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Do students at various colleges differ in now sociable they are? Twenty-five students were randomly selected from each of three colleges in a particular region and were asked to report on the amount of time they spent socializing each day with other students. The results for college x was a mean of 5 hours and an estimated population variance of 2 hours: for college y, m= 4, s2=1.5; and for college Z, M= 6, s2 =2.5 what should you conclude? Use the .5 level.
(a) Use the steps of hypothesis testing,
(b) Figure the effects size for the study; and
(c) Explain your answer to (a) and (b) to someone who has never had a course in statistics.
Four properties are randomly selected from each neighborhood and the ratios recorded for each as follows:
Graph the distribution using a histogram. Calculate the mean and standard deviation.
What additional strategies (up to 3) you would propose that may increase validity of the findings.
A. Determine the regression equation. B. Determine the estimated sales if 40 contacts are made.
Find out the p-value associated with test of hypothesis you conducted?
Determine the probability that mean annual snowfall during 40 randomly picked years will exceed 111.8 inches?
It could not do anything with the airport and suffer a loss of revenue. The current value of raised revenue from a new airport is in question.
Probability for simple and compound events.A certain bowler can bowl a strike 70% of the time. What is the probability that she.
Draw the suitable 2x2 table, compute and interpret suitable measure of association.
Report the t-value, whether you accept or reject Ho, and whether the difference was significant in a brief sentence.
Is it reasonable to compute that the mean of the population is actually $15,000.
Make up a scatter diagram with 10 dots for each of the following situations:
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