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The director of Suntrust Hills company is concerned about the high cost of mortgage loan interest rates. The bank has no possibility of modifying the rates under the current economic conditions. The bank manager decides to survey a sample of the surrounding towns to see what people are paying for similar home interest rates. The telephone sample of 20 homes indicated that the customers are paying X (bar) = $185.4 and s = $32.20 for a yearly contract.
a. Using the 0.05 level of significance, is there evidence that the population mean is above $190?
b. What is your answer in (a) if s = $50 and the 0.10 level of significance is used?
c. What is your answer in (a) if X (bar) = $199.00 and s = $20.20?
Is there a significant difference in the proportions of patients reporting pain relief?
1. What do discrete random variables describe? 2. Explain joint probability. 3. Explain conditional probability.
Kind of examination produced significant main effects on both mean mark and time taken to complete the examination.
Find out the suitable critical value(s) for this situation given a 0.05 significance level. Find out/compute the value of sample test statistic.
You are told that twenty-five percent of the player names in the hat are quarterbacks and that forty percent of the players in the hat have Porsches in their garage at home. What is the likelihood that you will get to go to lunch with a quarterbac..
Computing probability values using normal distribution - How many students earned between $20,000 and $40,000
You will actually have negative sales using this multiple regression analysis
Which test should we use to determine whether the difference between Mesa and Tempe is statistically significant? Why? Should it be one or two-tailed?
What are the mean value and standard deviation of the number among these 15 that are from the second section? What are the mean value and standard deviation of the number of projects not among these first 15 that are from the second section?
The level of significance indicates the probability of rejecting a false null hypothesis.
The appropriate use of multiple regression depends on being able to make four basic assumptions about the data being used to develop the regression model:
At.05 level of significance, is there evidence to propose that mean life length of the batteries manufactured by this manufacturer is more than 400 hours?
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