Identify the class width, class midpoints, and class boundaries for the given frequency distribution. Blood Platelet Count Frequency 150-219 220-289 44 290-359 81 360 429 430 499 6 500-569 570-639 1 The class width is O- (Type an integer or a decimal. Do not round.) The class midpoints areO (Type integers or decimals. Do not round. Use a comma to separate answers as needed.) The class boundaries aren (Type integers or decimals. Do not round. Use a comma to separate answers as needed.)

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Identify the class width, class midpoints, and class boundaries for the given frequency distribution.
Blood Platelet Count
Frequency
150-219
220-289
44
290-359
81
360 429
430 499
6
500-569
570-639
1
The class width is O-
(Type an integer or a decimal. Do not round.)
The class midpoints areO
(Type integers or decimals. Do not round. Use a comma to separate answers as needed.)
The class boundaries aren
(Type integers or decimals. Do not round. Use a comma to separate answers as needed.)
Transcribed Image Text:Identify the class width, class midpoints, and class boundaries for the given frequency distribution. Blood Platelet Count Frequency 150-219 220-289 44 290-359 81 360 429 430 499 6 500-569 570-639 1 The class width is O- (Type an integer or a decimal. Do not round.) The class midpoints areO (Type integers or decimals. Do not round. Use a comma to separate answers as needed.) The class boundaries aren (Type integers or decimals. Do not round. Use a comma to separate answers as needed.)
A pediatrician has three patients with measles and they are ages 2, 4, and 12. Assume that samples of size n=2 are randomly selected with replacement from the population. Listed below
are the nine different samples. Complete parts (a) through (d) below.
2,2
2,4
2,12
4,2
4.4
4,12
12,2
12,4
12,12
a. Find the value of the population standard deviation o.
(Round to three decimal places as needed.)
b. Find the standard deviation of each of the nine samples and then summarize the sampling distribution of the standard deviations in the format of a table representing the probability
distribution of the distinct standard deviation values.
Probability
(Type integers or fractions. Use ascending order of the sample standard deviations.)
c. Find the mean of the sampling distribution of the sample standard deviations.
The mean of the sampling distribution of the sample standard deviations is
(Round to three decimal places as needed.)
d. Based on the preceding results, is the sample standard deviation an unbiased estimator of the population standard deviation? Why or why not?
O A. The sample standard deviations do target the population standard deviation. Therefore, sample standard deviations are unbiased estimators.
O B. The sample standard deviations do not target the population standard deviation. Therefore, sample standard deviations are biased estimators.
OC. The sample standard deviations do not target the population standard deviation. Therefore, sample standard deviations are unbiased estimators.
O D. The sample standard deviations do target the population standard deviation. Therefore, sample standard deviations are biased estimators.
Transcribed Image Text:A pediatrician has three patients with measles and they are ages 2, 4, and 12. Assume that samples of size n=2 are randomly selected with replacement from the population. Listed below are the nine different samples. Complete parts (a) through (d) below. 2,2 2,4 2,12 4,2 4.4 4,12 12,2 12,4 12,12 a. Find the value of the population standard deviation o. (Round to three decimal places as needed.) b. Find the standard deviation of each of the nine samples and then summarize the sampling distribution of the standard deviations in the format of a table representing the probability distribution of the distinct standard deviation values. Probability (Type integers or fractions. Use ascending order of the sample standard deviations.) c. Find the mean of the sampling distribution of the sample standard deviations. The mean of the sampling distribution of the sample standard deviations is (Round to three decimal places as needed.) d. Based on the preceding results, is the sample standard deviation an unbiased estimator of the population standard deviation? Why or why not? O A. The sample standard deviations do target the population standard deviation. Therefore, sample standard deviations are unbiased estimators. O B. The sample standard deviations do not target the population standard deviation. Therefore, sample standard deviations are biased estimators. OC. The sample standard deviations do not target the population standard deviation. Therefore, sample standard deviations are unbiased estimators. O D. The sample standard deviations do target the population standard deviation. Therefore, sample standard deviations are biased estimators.
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