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The average height of a male soldier is 70 inches with a standard deviation of 4 inches. The average height of female soldier is 66 inches with a standard deviation of 4 inches. If a male soldier and female soldier are paired up what will be the mean and standard deviation for the difference in heights for each possible pair?
The mean sat verbal score is 401, with a standard deviation of 97. Use the empirical rule to determine what percent of the scores lie between 207 and 498.
Find out equation of the line of best fit. Find out r - Is there a strong relationship?
Based on the information about typical use, what is the probability that at least 25 of these women become pregnant in the next year? Is the Normal approximation permissible?
Identify your research question, your research (alternative) hypothesis, and your null hypothesis. Also, identify your independent and dependent variable.
Telephone calls arrive at a switchboard in a Poisson process at the rate of 2 per minute. A random one-tenth of the calls are long distance.
Paired samples t-test for the given data - financial advice from the voluntary organization - A local voluntary organization affiliated to the Citizens Advice Bureau offers free financial advice to residents in the area who are registered debtors
Is there sufficient evidence for concluding that true average repair time exceeds 200 min? Carry out a test of hypotheses using a significance level of .05.
Consider the following data values of variables x and y. The equation of the least-squares regression line for this data is
For a sample of 120 students selected at random, what is the mean and variance of the number of students who watch this game?
Compute the mean, median and mode measures of central tendency for the number of years of work experience. Which measure does the best job of describing central tendency for this variable?
You are given an annual time series with 40 consecutive values and asked to fit a fifth-order autoregressive model.
Using a 2-month weighted moving average, with weights of 2 for the most recent month and 1 for the previous month develop forecasts sales for March to June inclusive.
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