Score: 0 of 1 pt 3.4.1 Fill in the blank. represents the number of standard deviations an observation is from the mean. The represents the number of standard deviations an observation is from the mean. The

La Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and a standard deviation of 700 Su grams while babies bom after a gestation period of 40 weeks have a mean weight of 2900 grams and a standard deviation of 395 grams. If a 34-week gestation period baby weighs 3150 grams and a 40-week gestation period baby weighs 3350 grams, find the Pe corresponding 2-scores. Which baby weighs more relative to the gestation period? Find the corresponding Z-scores. Which baby weighs relatively more? Select the correct choice below and fill in the answer boxes to complete your choice (Round to two decimal places as needed.) O A. The baby born in week 34 weighs relatively more since its Z-score. is smaller than the Z-score of for the baby born in week 40 OB. The baby born in week 40 weighs relatively more since its Z-score, is smaller than the 2-score of for the baby born in week 34 OC. The baby born in week 40 weighs relatively more since its Z-score, is larger than the 2-score of for the baby born in week 34 D. The baby born in week 34 weighs relatively more since its Z-score, is larger than the 2-score of for the baby born in week 40

La Su Pe In a certain city, the average 20 to 29-year old man is 69.6 inches tall, with a standard deviation of 3.0 inches, while the average 20 to 29-year old woman is 64.5 inches tall, with a standard deviation of 3.9 inches. Who is relatively taller, a 75-inch man or a 70-inch woman? Find the corresponding z-scores. Who is relatively taller, a 75-inch man or a 70-inch woman? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) O A. The Z-score for the woman, is smaller than the Z-score for the man, so she is relatively taller B. The Z-score for the man, is larger than the z-score for the woman, so he is relatively taller OC. The Z-score for the man, is smaller than the Z-score for the woman, so he is relatively taller D. The Z-score for the woman, is larger than the Z-score for the man, so she is relatively taller

La Su A highly selective boarding school will only admit students who place at least 2 standard deviations above the mean on a standardized test that has a mean of 100 and a standard deviation of 24. What is the minimum score that an applicant must make on the test to be accepted? The minimum score that an applicant must make on the test to be accepted is be

La Su Pe A manufacturer of bolts has a quality control policy that requires it to destroy any bolts that are more than 2 standard deviations from the mean. The quality-control engineer knows that the bolts coming off the assembly line have mean length of 13 cm with a standard deviation of 0.10 cm. For what lengths will a bolt be destroyed? Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to one decimal place as needed.) O A. A bolt will be destroyed if the length is less than OB. A bolt will be destroyed if the length is less than cm or greater than OC. A bolt will be destroyed if the length is greater than D. A bolt will be destroyed if the length is between cm and cm. cm cm cm.

Explain the meaning of the following percentiles in parts (a) and (b). (a) The 5th percentile of the weight of males 36 months of age in a certain city is 13.0 kg. (b) The 95th percentile of the length of newborn females in a certain city is 53.3 cm. (a) Choose the correct answer below. O A. 5% of males weigh 13.0 kg or more, and 95% of 36-month-old males weigh less than 13.0 kg. B. 5% of males weigh 13.0 kg or less, and 95% of 36-month-old males weigh more than 13.0 kg. OC. 5% of 36-month-old males weigh 13.0 kg or less, and 95% of 36-month-old males weigh more than 13.0 kg. OD. 5% of 36-month-old males weigh 13.0 kg or more, and 95% of 36-month-old males weigh less than 13.0 kg.

La Su Pe Violent crimes include rape, robbery, assault, and homicide. The following is a summary of the violent-crime rate (violent crimes per 100,000 population) for all states of a country in a certain year. Complete parts (a) through (d). Q, -271.8, Q2 - 387.9, Q, = 529.7 (a) Provide an interpretation of these results. Choose the correct answer below. O A. 25% of the states have a violent-crime rate that is 271.8 crimes per 100.000 population or less. 50% of the states have a violent-crime rate that is 387.9 crimes per 100,000 population or less. 75% of the states have a violent-crime rate that is 529.7 crimes per 100,000 population or less. B. 25% of the states have a violent-crime rate that is 271.8 crimes per 100.000 population or more. 50% of the states have a violent-crime rate that is 387.9 crimes per 100,000 population or more. 75% of the states have a violent-crime rate that is 529.7 crimes per 100,000 population or more OC. 75% of the states have a violent-crime rate that is 271.8 crimes per 100,000 population or less. 50% of the states have a violent-crime rate that is 387.9 crimes per 100,000 population or less. 25% of the states have a violent-crime rate that is 529.7 crimes per 100.000 population or less

La Su Pe The accompanying data represent the miles per gallon of a random sample of cars with a three-cylinder, 1.0 liter engine. (a) Compute the Z-score corresponding to the individual who obtained 36.2 miles per gallon. Interpret this result (b) Determine the quartiles. (c) Compute and interpret the interquartile range, IQR. (d) Determine the lower and upper fences. Are there any outliers? B Click the icon to view the data. (a) Compute the z-score corresponding to the individual who obtained 362 miles per gallon. Interpret this result The Z-score corresponding to the individual is and indicates that the data value is standard deviation(s) the decimals rounded to two decimal places as needed.) mean MPG Data median 32.8 34.1 34.8 35.6 35.9 36.2 37.5 37.6 378 38.0 382 38.4 38.6 38.7 39.3 39.6 40.1 40.6 41.5 41.6 42.5 427 43.7 49.1 Enter your answer in the edit field

The accompanying data represent the monthly rate of return of a certain company's common stock for the past few years. Complete parts (a) and (b) below. Click the icon to view the data table. (a) Determine and interpret the quartiles. Х Rate of Return The first quartile is Q1 = (Round to four decimal places as needed.) 0.26 0.26 0.04 0.06 0.06 -0.04 -0.04 0.22 0.48 0.06 -0.15 0.19 0.05 0.18 0.09 0.02 -0.05 -0.02 0.08 0.02 -0.02 0.13 -0.08 -0.02 0.06 -0.01 0.07 -0.05 0.01 -0.10 0.02 0.03 0.01 0.11 -0.11 0.09 0.10 0.25 -0.02 0.03 Print Done

0 La Su Pe A cellular phone company monitors monthly phone usage. The following data represent the monthly phone use in minutes of one particular customer for the past 20 months. Use the given data to answer parts (a) and (b) 326 535 482 518 550 405 340 507 385 526 556 483 552 462 394 447 457 434 477 433 (a) Determine the standard deviation and interquartile range of the data, (Round to two decimal places as needed.) S

Ati La Su Pe Explain the circumstances for which the interquartile range is the preferred measure of dispersion. What is an advantage that the standard deviation has over the interquartile range? Choose the correct answer below. O A. The interquartile range is preferred when the distribution is symmetric. An advantage of the standard deviation is that it increases as the dispersion of the data increases OB. The interquartile range is preferred when the data are skewed or have outliers. An advantage of the standard deviation is that it uses all the observations in its computation. OC. The interquartile range is preferred when the data are not skewed or no have outliers. An advantage of the standard deviation is that it uses all the observations in its computation OD. The interquartile range is preferred when the data are bell shaped. An advantage of the standard deviation is that it is resistant to extreme values. O E. The interquartile range is preferred when the distribution is symmetric. An advantage of the standard deviation is that it is resistant to extreme values. OF. The interquartile range is preferred when the data are bell shaped. An advantage of the standard deviation is that it increases as the dispersion of the data increases

Question Help Cu 3.5.16 Ati The data to the right represent the number of chocolate chips per cookie in a random sample of a Su name brand and a store brand. Complete parts (a) to (c) below. Pe Full data set Name Brand Store Brand 35 30 23 24 22 17 24 25 28 27 16 27 32 22 29 23 22 29 28 22 23 30 33 26 26 20 (a) Draw side-by-side boxplots for each brand of cookie. Label the boxplots 'N' for the name brand and "S" for the store brand Choose the correct answer below ОА. Ов. OC N N 10 20 40 10 Click to select your answer and then click Check Answer. ? 2 parts remaining Clear All Final Check

Cu COL.3.63 Att La Which measure of spread is considered resistant? Su Choose the correct answer below. Pe O Range O Standard deviation O Variance O Interquartile range

If someone's gross annual income has a z-score of positive 2, what can be concluded? Choose the correct answer below. O A. Their income is 2 standard deviations above the median income. B. Their income is 2 standard deviations above the mean income. OC. Their income is 2 standard deviations below the median income. OD. Their income is twice the mean income.

Explain why Z-scores would be an appropriate way to compare the heights of the world's tallest man and tallest woman. Choose the correct answer below. OA. Z-scores are resistant to extreme values, making them ideal for this type of comparison B. Male and female heights have different units, and a unitless measure is needed for comparison OC. Height distributions for men and women have different centers and spreads, making it difficult to compare male and female heights directly OD. Z-scores can only be calculated for data values from distributions with similar centers and spread.

La If you calculate the z-score for your height in inches, what unit is used on the Z-score? Su Choose the correct answer below. Pe O A. The Z-score will have no units. OB. The Z-score will be in square inches. O C. The Z-score will be in reciprocal inches. OD. The Z-score will be in inches.

Suppose a student earns a 75 on his statistics exam, and his grade has a z-score of 1.5. Since the class did not perform well on the exam, the professor announces that she will adjust the grades by adding 10 points to each score. How will this adjustment change the student's Z-score? e Choose the correct answer below. A. It is not possible to determine the effect this adjustment will have on your Z-score without more information B. Your Z-score will be higher than 1.5 since your score is higher and the class mean will remain the same after the adjustment OC. Your Z-score will be lower than 1.5 since the class mean will increase with the adjustment, lowering all the z-scores. OD. Your Z-score will not change since the adjustment shifts the entire distribution of scores but does not change the relative position of your score in the class.

QL.3.74 Question Help of the middle percent of the data The interquartile range (IQR) is a measure of the Choose the answers below that correctly fills in the blanks The interquartile range (IQR) is a measure of the of the middle percent of the data 50 25 75

Cu Ati 3.5.2 Question Help In a boxplot, if the median is to the left of the center of the box and the right whisker is substantially longer than the left whisker, the distribution is skewed La Su Pe left right

Cu 3.5.3 Question Help Ati La (a) Identify the shape of the distribution, and (b) determine the five-number summary Assume that each number in the five-number Su summary is an integer Pe a a. Choose the correct answer below for the shape of the distribution O A The distribution is roughly symmetric B. The distribution is skewed left OC. The distribution is skewed right OD. The shape of the distribution cannot be determined from the boxplot. Click to select your answer and then click Check Answer Check Answer Clear All 1 part remaining

Cu 3.5.5 Att La Use the side-by-side boxplots shown to complete parts (a) through (e). Su a Pe Q x y 90 120 30 (a) What is the median of variable x? The median of variable x is (Round to the nearest integer as needed.) Enter your answer in the answer box and then click Check Answer. Clear All 4 parts remaining

Cu 3.5.12-T 0.610 0.609 0.610 Ati La Su Pe The following data represent the weight (in grams) of a random sample of 13 medicine tablets. 0 612 0.605 0.610 Find the five-number summary, and construct a boxplot for the data. Comment on the shape of 0.608 0.599 0.610 the distribution 0.612 0.600 0.605 0.607 The five-number summary is $0.0.0.00 (Round to three decimal places as needed. Use ascending order.) Enter your answer in the edit fields and then click Check Answer. Check Answer Clear All 2 parts remaining G Þ O

La Twenty girls (ages 9-10) competed in the 50-meter freestyle event at a local swim meet. The mean time was 43.70 seconds with a standard deviation of 8.07 seconds. The median time was 40.15 with an IQR of 4.98 seconds. Without looking at a graphical display. Su what shape would you expect the distribution of swim times to have? Pe Choose the correct answer below. O A. The distribution is likely to be skewed to the left since the mean is greater than the median. The presence of outliers on the low end could explain the fact that the IQR is smaller than the standard deviation OB. The distribution is likely to be skewed to the right since the mean is greater than the median. The presence of outliers on the high end could explain the higher standard deviation and the greater mean. OC. The distribution is likely to be symmetric since the mean is similar to the median and the IQR is considerably smaller than the standard deviation OD. The distribution is likely to be skewed since the mean and median are different, but it is not possible to predict the direction of the skew

La Su Pe A collection of data on class sizes at a community college produces the five-number summary below. Comment on the shape of the distribution of class sizes. Min = 12 Q, = 22 Max = 40 Q2 = 35 Q3 = 38 Choose the correct answer below. OA. The distribution appears to be skewed right since the median is further from the first quartile than the third quartile. Also, the left whisker would be longer than the right whisker in a boxplot for the data. B. The distribution appears to be skewed left since the median is further from the first quartile than the third quartile. Also, the left whisker would be longer than the right whisker in a boxplot for the data, OC. The distribution appears to be skewed left since the median is closer to the first quartile than the third quartile. Also, the right whisker would be longer than the left whisker in a boxplot for the data. D. The distribution appears to be fairly symmetric since the median is about the same distance from the first and third quartiles.

La Su Pe Data on average gas prices were collected in three different regions and summarized in the boxplots shown below. Which region had the lowest median gas price per gallon? In which region do the gas prices seem least stable? A Price per Gallon 36- 3.4 3.2- 3 Coast A Coast Region Coast Uwe LG WW A. The Coast Cregion had the lowest median gas price and also the least stable prices, B. The Coast Bregion had the lowest median gas price and also the least stable prices, C. The Coast A region had the lowest median gas price, but the Coast Cregion had the least stable prices. OD. The Coast A region had the lowest median gas price and also the least stable prices.

Question Help DL Score: 0 of 1 pt Cu COL.3.94 Ati La The following boxplot represents the exam scores for a class of 30 students. Which histogram Su seems most reasonable for this data? Pe AExam Scores 100- 90- 80- 70- 60- 50- Class 1 B OD Frequency OA A Frequency 8- AFrequency 8 3- 6- 6- OC Frequency 6- 5- 4 3. 2- 1 0-1 50 60 70 80 90 100 Class 1 Exam Scores 2 4- 4- 1 2- 2- 0 50 60 70 80 90 100 Class 1 Exam Scores 0 50 60 70 80 90 100 Class 1 Exam Scores 0 40 50 60 70 80 90 Class 1 Exam Scores Anna Aneuer