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Find the Z score for a standard normal curve.
For a standard normal curve, find the z-score that separates the bottom 90% from the top 10%.
A. 0.28B. 1.28C. 2.28D. 3.28
Decide if the events A and B are mutually exclusive or not mutually exclusive. A card is drawn from standard deck of 52 playing cards.
What is your conclusion regarding null hypothesis?
Test the hypothesis. Will you reject or not reject the null hypothesis at α = 0.05
Compute a 95% confidence interval for the population proportion of positive drug tests. Explain why is the normality assumption not a problem despite the very small value of p.
Assume the data for the three groups are independent and the data are approximately Normal. The P-value is less than 0.01. The correct conclusion is that
What is the minimum sample size needed in order for you to be 95% confident that your estimate is within 5 of µ? Use the value 20 for the population standard deviation of scores on this subsection.
Assuming that students make their decisions independently, the number who accept has the B (1200, 0.75) distribution. If this number is less than 950, the college will admit students from its waiting list.
Assuming no discrimination based on gender, what is the probability of getting 41 or fewer women when 100 new employees are hired?
Findout either the given correlation is significant at given level of significance. Illustrate what does sample size have to do with the significance of r.
Do any of the selected samples seem to be out of the control limits? Describe.
Create the indicated confidence interval for population mean µ using a t- distribution.
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