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Members of the Senate took a battery of tests to assess their abilities. In the Talking As If You Are Saying Something Test, the average score was 40 with a standard deviation of 5. In the Be Sincere Even If You Don't Mean It Test, the average score was 80 with a standard deviation of 10.
a. What is the probability that one of the senators earned a score of less than 90 on the Be Sincere Even If You Don't Mean It Test?
b. What is the probability that one of the senators earned more than a score of 43 on the Talking As If You Are Saying Something Test?
Calculate the standard deviation of the sample mean for samples of size 1, 4, 25, 100, 250, 500, 1000, and 5000. Graph your results with the sample size on the x axis and the standard deviation on the y axis.
q1. a researcher is interested in comparing the effectiveness of three different kinds of therapy for anger problems.
Get an answer from tutors to this homework question now: Under what circumstances is the experimentwise alpha level a concern?
If light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500 hours, what percentage of light bulbs have a life less than 2500 hours?
q1 if light bulbs have lives that are normally distributed with a mean of 2500 hours and a standard deviation of 500
Which of the following is the correct set of probabilities for X and if a student is selected at random, the probability he or she is either a Junior or a Senior
Compute the probability of a successful operation (i.e., an operation in which at least one hit is a success) if all 3 missiles are launched and a hit within 40 miles of the target is considered a success.
Consider you have completed a survey of employees working in a call center doing customer service for a major manufacturing company.
Explain the notion of hypothesis testing. What is the general process that one should follow in conducting a hypothesis test?
1. a fruit grower sprays 200 trees with a new spray and 200 other trees with a standard spray to protect against insect
In a regression analysis, three independent variables are used in the equation based on a sample of forty observations. What are the degrees of freedom associated with the F-statistic?
A random sample of 150 voters yields 87 who support her. The candidate wishes to test her claim at the 0.05 level of significance. Compute the value of test statistic.
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