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Perform the following activities using a program such as MS Excel. Keep all calculations within one file. You may use separate worksheets within the same file, though. 1.Open a worksheet and enter in the following data: Years of Education Expenditures on Books 13 5 17 45 9 0 11 18 15 25 12 4 13 10 18 35 16 15 10 0 a.Using this data, report the descriptive statistics for each variable. Report the mean and the standard deviation for each variable. b.Determine if there is a relationship between the two variables. Be sure to determine if the relationship is significant. c.Using this same data, report the regression equation that could be used to make predictions about the amount of money spent on books when the number of years of education is known. 2.You are a researcher who is interested in studying the effects of Prozac on children. You equally divide 40 young rats into two groups: one that receives no Prozac and one group that receives one dose of Prozac. You want to determine if there is a significant effect of Prozac on learning and memory. You collect the number of errors on a task for each subject, which is listed below. Higher numbers of errors indicate lower levels of learning and memory. You analyze the data using a software program to determine if groups are significantly different from one another. Control Group Prozac Group 5 12 2 7 6 10 3 12 2 14 5 10 3 9 1 11 2 6 1 11 2 9 7 11 3 11 5 12 5 15 4 10 3 12 5 12 4 11 5 6
This set of height measurements are recorded in centimeters. Answer the following questions using the Histogram Applet. Is 1.7cm a Plausible mean value? Explain.
Perform the 5 steps of hypothesis testing procedure. Please present the calculations and results and Graphs. Make all possible observations and interpret the results
Which shows the production time requirements for the 4 required manufacturing operations and the accounting department's estimate of the profit contribution per bag?
Find out the probability that temperature of oven will range from 460 to 470 F?
To revise an existing inventory system, a company needs to know something about the lead time for orders it places for a critical part. The company looks at the last 20 orders placed and finds that the lead time in days are:
A researcher wanted to invetigate whether there is a significant difference in the average age of instructors, assistant professors, assocated professors and full professors at a university. The faculty was selected at random and their ages were r..
What is the probability that the second one selected is defective given that the first one was defective? What is the probability that both are defective?
Suppose the horses in a large stable have a mean weight of 1464 lbs, and a standard deviation of 111. What is the probability that the mean weight of the sample horses would differ from the population mean by less than 11 lbs if 34 horses are samp..
Find the discrete probability distribution for the random variable X and compute the corresponding mean and standard deviation.
Far separated sample means + differences of sample means are large compared to their internal (within) variability! Which of the following examples indicate group diff"s are "large"?
What is the approximate probability that the mean diameter of the sample of 36 bearings will lie within 0.0001 inch of the population mean diameter of the bearings?
What is a p-value in testing hypothesis? How does this p-value help us to decide to/not to reject a Null hypothesis? What might happen if we do not use this p-value in particular, when we are rejecting a Null hypothesis?
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