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Two samples of size 25 each yielding x-bar = 6.47, Sx = 1.14, y-bar = 6.17, and Sy =1.166 show a significant difference between means with a p-value of 0.3623.
This set of height measurements are recorded in centimeters. Answer the following questions using the Histogram Applet.
Determine the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes? Determine the probability of completing the exam in one hour or less?
What decision should be made regarding the null hypothesis?
Find the third quartile Q3 of the list of 24 sorted values shown below. Which is relatively better: a score of 81 on a psychology test or a score of 50 on a economics test? Scores on the psychology test have a mean of 88 and a standard deviation of..
A discrete random variable Y takes the value -1, 0 and 1 with probabilities 1/2θ, 1- θ and 1/2θ respectively. Let Y1 and Y2 be two independent random variables, each with the same distribution as Y.
Test the hypothesis that the annual incomes of Teachers in areas of more than 500,000 are significantly more than those in areas of less than 100,000. Use the 5% level of risk.
a score that is 6 points below the mean corresponds to a z- score of z -0.50. what is the population standard
For the events A and B, if (A∩B)' =S (where S, of course, is the sample space), then the events CANNOT be mutually exclusive.??b. In a confidence interval for the difference between n matched pairs of observations, the t-distribution to use is with 2..
Is this an ideal data collection method? Can the results be considered reliable? Can the gathered data be representative of the population?
What proportion of children 10-15 years would be classified as hyperlipidemia(assume that hyperlipidemia is defined as a total cholesterol level over 200)?
Using the Variable view in SPSS list what each of the values of the categories assigned for age represent.
Kannon Camera has developed a new camera that it claims can take an average of more than 10 photographs per second. You decide to evaluate the company's claim. In summary, in this problem you are given:
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