# Question: Refer to the exam scores displayed in Exercise 3 98 In exercise

Refer to the exam scores displayed in Exercise 3.98.

In exercise

a. Use the empirical rule to estimate the percentages of the observations that lie within one, two, and three standard deviations to either side of the mean.

b. Use the data to obtain the exact percentages of the observations that lie within one, two, and three standard deviations to either side of the mean.

c. Compare your answers in parts (a) and (b).

d. Construct a histogram or a stem-and-leaf diagram for the exam scores. Based on your graph, comment on your comparisons in part (c).

e. Is it appropriate to use the empirical rule for these data? Explain your answer.

In exercise

a. Use the empirical rule to estimate the percentages of the observations that lie within one, two, and three standard deviations to either side of the mean.

b. Use the data to obtain the exact percentages of the observations that lie within one, two, and three standard deviations to either side of the mean.

c. Compare your answers in parts (a) and (b).

d. Construct a histogram or a stem-and-leaf diagram for the exam scores. Based on your graph, comment on your comparisons in part (c).

e. Is it appropriate to use the empirical rule for these data? Explain your answer.

## Answer to relevant Questions

Refer to Exercise 3.99. In exercise Chebychev’s rule also permits you to make pertinent statements about a data set when only its mean and standard deviation are known. Here is an example of that use of Chebychev’s rule. ...1, 2, 3, 4, 1, 2, 3, 4 a. Obtain the quartiles. b. Determine the interquartile range. c. Find the five-number summary. 1, 2, 3, 4, 5, 6, 7, 1, 2, 3, 4, 5, 6, 7 a. Obtain the quartiles. b. Determine the interquartile range. c. Find the five-number summary. In the article “Material Culture as Memory: Combs and Cremations in Early Medieval Britain” (Early Medieval Europe, Vol. 12, Issue 2, pp. 89–128), H. Williams discussed the frequency of cremation burials found in 17 ...In an article titled "Great White, Deep Trouble" (National Geographic, Vol. 197(4), pp. 2-29), Peter Benchley-the author of JAWS-discussed various aspects of the Great White Shark (Carcharodon carcharias). Data on the number ...Post your question