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Find the critical value for different types of sample size and level of significance:
A paired difference experiment yielded and pairs of observations. In each case described below, what is the rejection region for testing H0: mean= 6 against Ha: mean >6. Use standard deviation = 8.1. a) nD = 43, a = 0.07 z>
b) nD = 29, a = 0.01
c) nD = 9, a = 0.03 t >
Create a 95% confidence interval for true mean debt for student borrowers.
A certain airplane has two independent alternators to provide electrical power.
Indicate which would be the independent variable and which would be the dependent variable in each of the following:
What is the probability that the average IQ, from a random sample of 64 individuals, is greater than 102?
If the standard deviation is $89.46, find the probability that a randomly selected customer spends between $550.67 and $836.94.
The profit from selling food at an outdoor cafe depends on the number of hours of sunshine through the formula, Profit = 1000(1-(e -x /10)). Find the expected level of profit.
The following table shows the number of miles driven in each trial.
Find out the mean to the nearest whole number, for the following list of numbers: 20, 43, 67, 52, 67, 44, 62, 90, 21, 19, 15
Complete the test at the 5% level of significance.
Mean=63.6 Standard deviation=2.5 If 36 data points are arbitrarily chosen, determine the probability that mean is less than 64.
Compare among expected monetary approach also expected utility approach. Sketch the brokers utility curve and describe what it says about her risk profile.
Use PHStat to make a box-whisker plot. If PHSTAT has yet to be installed, calculate Xmin, Xmax, Q 1 , Q 3 and median using equation in Class Notes-Quartiles, Percentile & Dectiles.
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