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Using one mean Z test to test whether or not to support the claim.
The stats teacher believes the actual average amount of time students in the district study at home per week is lower than the publicized 6 hours. He conducts a hypothesis test and finds the following: = 5.65, σX = 1, n = 25. Is there evidence that the average hours is below 6? Explain.
a) There is fairly strong evidence that µX < 6, a p-value of 0.04 is fairly small.
b) There is little evidence that µX < 6, a p-value of 0.04 is fairly large.
c) There is fairly strong evidence that µX < 6, a p-value of 0.08 is fairly small.
d) There is weak evidence that µX < 6, a p-value of 0.08 is fairly large.
What is the null hypothesis? Use a = 0.05 .
Confirm whether given random variable is binomial distribution or not. If this experiment is finished with replacement, explain why.
A certain airplane has two independent alternators to provide electrical power. The probability that a given alternator will fail on a 1-hour flight is .02. What is the probability that:
For the 20 test scores shown, find the percentile rank for a score of 86.
At the .05 significance level, can we conclude that the guideline is still reasonable?
A range of values constructed from sample data so that the parameter occurs within that range at a specified probability is:
Find out sample correlation coefficients of (I) age with dry weight, and (2) age with log 10 dry weight. Interpret your results.
A random-effects ANOVA refers to the analysis where the levels included in the study represent a random sample of all levels that exist.
What is the probability that a particular driver had exactly two speeding violations?
Determine a 95% confidence interval for the true mean weight of such boxes?
Students are the University of New Harmony received 10, 000 course grades last semester. The table below breaks down these grades by which school of the university taught the course.
At the .01 significance level, can we conclude that there is more variation?
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