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What proportion of kids aged 10-15 years is assumed to follow a normal distribution with a mean of 191 and a standard deviation of 22.4
When performing a chi-square test for independence, explain how the "cell frequencies under the independence assumption" are calculated.
For each of the F statistics given above find the degrees of freedom and an approximate P-value. Summarize the results of these tests.
The probability that merchandise stolen from a store will be recovered is 15%. Suppose a random sample of 8 stores, from which merchandise has been stolen, is chosen. Find the mean μ of this probability distribution.
Does the data prove a significant difference in mean GPAs? GPA1 GPA for Randomly Selected Students in Four Business Majors.
Find the 99% confidence interval for the population proportion.
The resulting list of twenty values has a mean of 4.4 and a standard deviation of 4.2. Construct a 99% confidence interval to estimate the difference between the mothers and fathers.
What is the minimum sample size needed in order for you to be confident that your estimate is within 5 of ? Use the value for the population standard deviation of scores on this subsection.
Mention your decision regarding the null hypothesis. If H 0 rejected can we conclude that treatment 2 and treatment 3 differ? Use 95 percent level of confidence.
The manager requires the estimate to be within 1.0 minutes of the population value. What sample size is needed?
There is significant evidence at alpha=0.05 t o show that the populations of endotoxin levels in children living varying distances from operating farms are not equal.
Compute the following .r = correlation between x and y = - 0.7 = mean of the values of x = 50.25 = mean of the values of y = 31.77 = standard deviation of the values of x = 15.85 = standard deviation of the values of y = 1.76 The slope of the leas..
Assume P1 and P2 move simultaneously. Represent this game in normal form.
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