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Suppose that a random sample of 16 adults has a mean score of 71 on a standardized personality test, with a standard deviation of 6. (A higher score indicates a more personable participant.) If we assume that scores on this test are normally distributed, find a 95% confidence interval for the mean score of all takers of this test. Complete the table below.
A. What is the lower limit of the confidence interval?
B. What is the upper limit of the confidence interval?
four hundred draws are made at random with replacement from a box. the average of the draws is 152.4 and their sd is
At the 0.01 level of significance, can we conclude that the type of collision is independent of whether the accident took place in a rural versus an urban setting?
A random sample of 160 car crashes are selected and categorized by age. The are listed below. The age distribution of for the given categories is 18% for under 26, 39% for 26-45, 31% for 46-65, and 12% for over 65.
Using the following measurements of y and x, perform a bivariate polynomial regression analysis.
What is the predicted values of the fund in the period t = 1? What is the predicted value of the fund in the period 3, and period 7?
Forty-four percent of consumers with credit cards carry balances from month to month. five consumers with credit cards are randomly selected. What is the probability that all consumers carry a credit card balance?
while walking along a railroad track in a daydream you are suddenly aware of a loud noise right behind you. what would
How many distinct two-level 16-run statistical orthogonal designs are available? What is meant by "distinct"?
1. a basketball player makes 40 of her free throws. she takes 5 free throws in a game. if the shots are independent of
The English Department wants to know whether there is a difference in the proportions of female students taking Eng 110 and Eng 100 courses. Samples are collected from each class: Eng 110 sample found 16 out of 29 students in class and Eng 100 ..
there are six ways in which a person and the situation interact to shape a persons goals thoughts feelings and
Mean duration of stuttering, in seconds, was recorded for 9 subjects whose disability had been classified as mild, moderate, or severe.
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