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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).
With the sample standard deviation of 12 lbs. Determine the 90% confidence interval of true mean weight of all college wrestlers.
The time in hours required for 40 individuals to complete their federal income tax returns. Using past years' data, the population standard deviation can be assumed known with σ=9 hours.
Briefly describe how the standard deviation influences the outcome of the hypothesis test. How does standard deviation influence measures of effect size?
Explain why the flight times are a population. Find the mean and median of the flight times. Find the range and the standard deviation of the flight times.
A psychologist is investigating the hypothesis that children who grow up as the only child in the household develop different personality characteristics than those who grow up in larger families.
1.at what age do babies learn to crawl? does it take longer to learn in the winter when babies are often bundled in
When a 99% confidence interval is calculated instead of a 90% confidence interval with n being the same, the margin of error will be
Three members of a club will be selected to serve as officers. The first person selected will be president, the second person will be vice-president and the third will be secretary/treasurer.
Although this critique was later discarded, how does user error affect the marketplace. When I buy my morning coffee at Starbucks, the cup warns me: "Careful, the beverage you are about to enjoy is extremely hot."
Create an APA style table that presents descriptive statistics for the sample.
It is known from previous studies that the population variances are 8.1 and 7.3 respectively. Using a level of significance of .01, is there evidence that the out of state students may be receiving lower grades? Fully explain your answer.
An auditor for Health Maintenance Services of Georgia reports 40% of policyholders 55 years of older submit a claim during the year. Fifteen policyholders are randomly selected for company records. How many of the policyholders would you expect to ha..
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