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The Florida Credit Bank is concerned about the quality of service provided to its customers. With the old computer system, a teller at this bank could serve, on the average, 18 customers per hour. Management recently installed a new computer system in the bank expecting that it would increase the service rate. To check if the new computer system is more efficient than the old system, the management of the bank took a random sample of 20 hours and found that during these hours the mean number of customers served by tellers was 25 per hour with a standard deviation of 2.5. Use a 1% level of significance. The hypothesis is that the average number of customers served per hour is 24 or less against the alternative hypothesis that the mean number of customers waiting is greater than 24.
Suppose a researcher has trained observers to rank participants according to their level of frustration when trying to solve a puzzle.
Determine the test criteria that would be used to test Ho: u 1.0 with n=18 and significance level of 0.01 using the classical approach.
The proportion of participants registering strong disapproval was 65%. At the 95% confidence interval and using a two-sided test, which of the following statements do these data support?
Find the P value for the indicated hypothesis test with the given standardized test statistic, z. Decide whether to reject H0 for the given level of significance deviation. Two-tailed test with test statistic z= -2.43 and standard deviation = 0.04..
A bag contains 4 red marbles, 3 blue marbles, and 7 green marbles. If a marble is randomly selected from the bag, what is the probability that it is blue?
Prove that there is a sequence of polynomials p_n on [0,1] such that p_n ----> 0 pointwise on [0,1] but the integral from 0 to 1 of p_n dx
Bill calculates a linear correlation coefficient between two variable as 1.20. How would you interpret this?
"Determine if the statement is a typical null hypothesis (Ho) or alternative hypothesis (Ha). The average price of a particular statistics textbook over the Internet is the same as the average price of the textbook sold at all bookstores in a coll..
A breakdown of the responses is shown in the accompanying table. Is there evidence at the 10% level to infer that the responses differ among the three groups of employees?
Many people think that job satisfaction in workplace is directly related to annual income. To check the validity of this assumption survey of 430 active working adults in U.S was taken that relates their job satisfaction to their annual income.
In the Florida lottery, six numbers from 1 to 53 must be selected. to win the jackpot, the six numbers must match the draw numbers.
Is it possible to provide a meaningful interpretation of the intercept of the sample regression line? Explain.
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