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Given a sample size of 22, with sample mean 726.2 and sample standard deviation 85.3, we perform the following hypothesis test.
Ho:u:= 750H1:u< 750
What is the conclusion of the test at the a=0.10 level? Please explain answer.
Assume sps professors have the average life normally distributed of 82 years, with population standard deviation of 5 years. Determine percent of sps professors will not live more than 80 years?
In testing whether each of the independent variables (Xs) in a multiple regression equation is statistically significant in explaining the dependent variable (Y), one uses the:
The mean salary for engineers with less than 5 years' experience is $60,000 with a standard deviation of $5,000. Compute the z values for both Rob and Rachel.
A survey indicates that male employees were more likely than females to relocate without being promoted. What information would you want to know before you accepted the results of this survey?
Using a 5% level of significance, is there any difference in proportion of guests who would select the two resorts? What is your conclusion?
Among coffee drinkers, men drink a mean of 3.2 cups per day with a standard deviation of 0.8 cups. assume the number of coffee drinks per day follows a normal distribution.
Determine, with 95% confidence, if the stocks from "socially conscious" companies are different from the mean P/E ratio of all other major stocks.
In a large section of statistics class, the points for the final exams are normally distributed with a mean of 72 and a standard deviation of 9. Grades are to be assigned according to the following rule.
1.females in a certain class rated their intelligence with a mean of 6.5. the males in the same class rated their
70% of all americans can do routine computations. If an employer were to hire 8 randomly selected americans, determine the probability distribution.
If these answers were combined into single statistic, how could we explain sample space? Mention how many elements are in sample space?
Fitting of simple linear regression equation - A researcher wishes to determine whether a person's age is related to the number of hours he or she jogs per week.
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