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Q1) As MSU student, you would like to know average grade point average (GPA) for all students enrolled in MSU in spring semester of 2007. You make a decision to take a sample of 200 students who were enrolled at MSU in spring semester of 2007 and ask them each what their GPA is. Mean of this sample is 2.71 with sample standard deviation of .55. What is range of values within which you can be 99% certain that mean GPA of all students enrolled in MSU in spring semester of 2007 falls? Mention your conclusion in one complete sentence.
Q2) A researcher at MSU reported that according to her sample, college graduate students at MSU take have average of 7.1 sexual partners with sample standard deviation of 3.4. N of this study was 4396.
i) Determine the point estimate in this study?
ii) Compute the standard error in this example?
iii) What is the population in this example?
How many days should be considered if a 95 percent confidence is used and the estimate is to be within one hundred dollars?
At the 0.05 level of significance, can we conclude Middletown students remained in their districts less time than Brockton students? Make use of 5-step hypothesis testing procedure.
In testing equality of two means below, determine the test statistic? (Use the equal variances formula)
Harry and Melissa Jacobson produce handcrafted furniture in a workshop on their farm. They have obtained a load of 600 board feet of birch from a neighbour and are preparation to produce round kitchen tables and ladder-back chairs during the next ..
Is this enough evidence to support Union's position? Use significance level of a = 0.05. You may suppose the mean annual salaries are normally distributed.
The casino game craps is based on rolling two dice. Here is the assignment of probabilities to the sum of numbers on the up face when two dice are rolled:
Determine the average score for ERAU graduates? Determine the value of test statistic? Significance level?
Where should the warranty limits be set so that only 10% of the TVs need repairs at the manufacturer's expense?
This activity is a revision of an activity found in Real Data: A Statistics Workbook Based on Empirical Data by Z. C Holcomb (1997). Published by Pyrczak Publishing.
Of the nine members of the board of trustees of a college, five agree with president on a certain issue. The president selects three trustees at random and asks for their opinions. What is the probability that at least two of them would agree with..
Determine the event that the sum of the numbers falling uppermost is less than or equal to 7
What is the probability that a particular driver had exactly two speeding violations?
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