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Show that it satisfies the required condition for being a probability distribution.
A calculus instructor uses computer aided instruction and allows students to take the midterm exam as many times as needed until a passing grade is obtained. Following is a record of the number of students in a class of 20 who took the test each number of times.
Students
Number of tests
10
1
7
2
3
4
A researcher selects a random example of college students and measures number of hours they spend watching television per week and their grade point average.
Do any of the selected samples seem to be out of the control limits? Describe.
We desire to test at 0.05 level of significance whether modification increases the life of battery. What is our decision rule? Reject null hypothesis if calculated t is less than 1.96.
Evaluate z statistic for the Wilcoxon rank sum test, standard deviation for the Wilcoxon rank sum test and P-value for the Wilcoxon rank sum test
If we want to estimate the populations mean travel-to-work time San Francisco residents with a margin of error of 1 minute, what sample size should be used? Assume 95 percent confidence.
A manufacturer of 35-mm cameras knows that a shipment of 30 cameras sent to the large discount store contains 8 defective cameras. The manufacturer also knows that the store will choose two of the cameras at a random, test them, and accept the shi..
Set-up/solve the problem graphically. (How many ceiling fans and how many floor fans should be made?)
Create a scatter plot for those data. Based on scatter plot, how would you explain relationship between the two variable.
A statistics instructor wants to know which route will get her to school the fastest. Each day from October 2 to November 15, when she gets to the turn point she checks the odometer on her car
What is the mean and standard deviation of the number preferring the incumbent and what is the probability that more than 68% will favor the incumbent?
Conduct the hypothesis test and compute the p-value. At a 0.05 level of significance, what is your conclusion?
At significance levels of .05 and .01 test H 0 : the factors A and B are independent.
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