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Q1) Fuel efficiency of cars in Motorville (measured in miles per hours) is of interest to you. It is known the variable has Normal probability distribution. You choose a random
Sample of 20 cars and obtain the following results: x‾= 26.8 s= 2.4
a) Calculate a 95% confidence interval for the population mean, µ
b) Calculate a 90% confidence interval for µ.
Q2) Determine the value of the finite population correction factor if population size is 1000 and the sample size is 300? What is the smallest sample size for which finite population correction factor must be Used?
An instructor claims the average time to take a statistics test is greater than 39 min. As, if a sample of 33 students took 43 min. is the instructor's claim true?
Standard deviation was increased to 40, determine the overall effect on their society? Would this change be a good thing?
Test hypothesis that annual incomes of corporate trainers in areas of more than 500,000 are considerably more than those in areas of less than 100,000. Make use of the 5% level of risk.
In ANOVA, which of the following is not affected by whether or not the population means are equal?
Develop an appropriate forecast model for the given problem whereas the student population has remained constant during this period.
Use a two proportion z-test to perform the required hypothesis test. State the conclusion.
What is the null hypothesis? What is your decision if a = 0.01?
A college student is taking 5 courses in a semester. He is willing to assume that he will get an A with probability 0.10, a B with probability 0.80, and a C with probability 0.1 in each of the courses. He defines X1, X2, and X3 to be the number of..
Recognize the kind of sampling (random, systematic, convenience, stratified, cluster) employed whenever a sample of people who smoke is obtained as explained below.
Any value which is based on having measured a sample is called:
Find a 95% confidence interval for the mean dielectric strength of the oil.
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
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