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Twenty-five factory workers were asked how many vacation days they take a year. The average of the sample was 22.85 days, and the standard deviation was 5.80 days. In the past HR uses an average of 25 vacation days per worker in order to make available man-hour and payroll predictions. Is there evidence to show that the number of vacation days decreased over the past year? Use alpha = .05
State the hypothesis, the test statistic, the conclusion, (what you are accepting or rejecting) and make sure you answer the question.
Find out the marginal probability density function for the provided value. Assume that two random variables, X and Y, have bivariate pdf given by:
What is approximately the largest sample mean of another sample of n= 16 participants you would expect to obtain from this finite population?
Any value which is based on having measured a sample is called:
The standard deviation of the time to complete the entire homework assignment
Is there any evidence that the different teatments produced different responses? If so, which one seems to work best?
Form the column of differences and find the mean and standard deviation of this column of numbers.
Probability for simple and compound events.A certain bowler can bowl a strike 70% of the time. What is the probability that she.
Aggregate the opinions of the experts by computing the minimum, maximum, 25 th percentile, 50 th percentile, and 75 th percentile values.
It is suspected that the mean turnover has changed and is not 6.0. Use the .05 significance level. Give the formula for the test statistic.
FBI Report Do greater universities tend to have more property crime, would you speek that the correlation is low, moderate or high
The mean and the standard deviation of a sample of 100 bank customer waiting times are 5.46 and 2.475 minutes, respectively. a) Assuming the distribution is bell-shaped, calculate the waiting time intervals containing 68% and 95% of bank customer w..
Note that Σ x = 2233 and Σ x 2 = 138,053. At the 5% level of significance, can the instructor conclude that the new mean is different from 64?
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