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In order to assess the protective immunizing activity of various whooping cough vaccines, suppose that 30 batches of different vaccines are tested on groups of children. Suppose that the following data give immunity percentage in home exposure values (IPHE values).
85
51
41
90
91
40
39
69
45
47
42
12
70
38
97
34
94
77
88
79
43
89
71
30
25
21
(a) Find the mean, variance, and standard deviation and interpret.
(b) Construct a frequency table with ?ve classes.
(c) Using the grouped data formula, ?nd the mean, variance, and standard deviation for the table in part (b) and compare it to the results in part (a).
you arrive to a trolly stop just missing the last trolly. the time until the next rolly arrival is modeled as a u46
Find a 95% confidence interval for the proportion p of the inner-city, working-class group who eventually became alcoholics.
consider the following summary data on the modulus of elasticity times106 psi for lumber of three different grades in
Explain why the allocation that would occur if consumers could costlessly resell a good is the same as the allocation from efficient rationing.
Test the hypothesis that the baby's birthweight is independent of the mother's age.
Find a 99% confidence interval for the population mean number of weekly miles.
Convert these four officers' scores to standardized z-values.Do you believe there was adequate reason to question these four exam scores? What suppositions are you making?
A psychologist is studying the distribution of IQ scores of girls at an alternative high school. In wishing to estimate the average IQ scores in this school.
a baseball player hit 67 home runs in a season. of the 67 home runs 20 went to right field 22 went to right center
Please show all steps to simplifying the rational expression.
Find the probability that a random selection of 9 songs will have mean length of 186.30 seconds or less. Assume distribution of the lengths of the songs is normal.
Population and the sample proportion of grandparents as primary caregivers (-hat) is to be calculated. What is the mean of the sampling distribution of -hat?
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