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Time spent using email per session is normally distributed with μ = 8 minutes and σ = 2 minutes.
a) What is the probability that the sample mean is between 7.8 and 8.2 minutes?
b) What is the probability that the sample mean is between 7.5 and 8 minutes?
c) If you select a random sample of 100 sessions, what is the probability that the sample mean is between 7.8 and 8.2 minutes?
Draw a scatter diagram of the following bivariate data.
Also include information about the number of participants you would assess and how you would go about estimating effect size and statistical power (when relevant).
Calculate the probability that a hand of 13 cards dealt from a normal pack of 52 contains exactly two kings and one ace. what is the probability that it contains exactly one ace given that it contains exactly two kings.
A doctor believes that the variance of systolic blood pressure is 470. A random sample of 20 patients found a variance of 525. What is the smaller critical value that would be used in a hypothesis test at a .05 significance level?
The accounting department at Western Materials Inc. national manufacturer of unattached garages, reports it takes two construction workers of a mean of 32 hours and standard deviation of 2 hours to erect Red Barn MODEL.
State the values of the coefficient of correlation and coefficient of determination correct to three decimal places
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.
The incarceration rate in one nation's prisons was 965 per 100,000 male residents, and 65 per 100,000 female residents.
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Compute the standard error of the proportion.
Which of the following best explains how the F ratio examines differences among groups? A. The critical F is compared to the critical t.
Illustrate what amount of sales would be required to be a super savings club member. Elucidate amount of sales would be required to be a gold club status.
Determine a random number generator and make simulated data for not more than 25 participants (test subjects) in study using ranges of values for variables you established above.
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