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The following data represent the service charge for direct-deposit customers if a customer's account falls below the minimum required $1,500 balance for a sample of 26 banks.
12 8 5 5 6 6 10 10 9 7 10 7 75 0 10 6 9 12 0 5 10 8 5 5 9
a. Construct a 95% confidence interval for the population mean service charge if a customer's account falls below the $1,500 minimum.
b. Explain in words what this confidence interval means.
In order to compare the means of two populations, independent random samples of 484 observations are selected from each population, with the following results:
It is a striking fact that the first digits of numbers in legitimate records often follow a distribution known as Benford's Law, shown below.
Compute cumulative probabilities for these numbers in second column. Then create a histogram illustrating data distribution. Using generated Normal probability table, determine probability of Pr(X
Based on your answers to a through d, decide whether or not to reject the null hypothesis at the given significance level. Explain your conclusion in the context of the problem.
For thefts involving more than $1,000, there is an inverse relationship between the value of the goods stolen and the length of the prison sentence given to the thief.
Determine the dimensions of resulting exchanger?
X is a continuous random variable uniformly distributed on [20, 45] that is, the end points c = 20 and d = 45.
To determine whether two categorical variables are independent, one should use the:
If person is selected at random determine the probability that he/she has enzyme level less than 4.0 units/ml?
At the .05 significance level, can she conclude that there is a difference in the mean amount of weight loss among the three diets?
Find a 95% confidence interval for the difference in the proportion of deaths between the streptokinase and the control group.
National average for 2-year leases is 30,000 miles. Select the suitable hypothesis.
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