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The GRE combined scores for students applying to an engineering school's Graduate Program are normally distributed with a mean of 1500 and a standard deviation of 100.
(a) An applicant needs a minimum combined score of 1400 to gain admission.
(b) What percentage of applicants have combined GRE scores between 1200 and
(c) The Dean of Engineering wants to change the minimum combined GRE score What percentage of applicants meet or exceed the minimum qualification ? Needed to gain admission, so that only 33% of applicants are eligible. What should the new minimum score be?
A Gallup Poll (June 9 to 12, 2008) interviewed a random sample of 822 adults (18 years or older). The people in the sample were asked about their level of confidence in a variety of institutions in the United States. Here are the results for small..
The probability that Traci Muldone will die during the 10-year term of a life insurance policy is assessed by the insurance company at 1/5. Arthur Average's probability of living to the end of the 10-year period is reckoned at 95%
A researcher desires to estimate the difference in means of two populations. To accomplish this, she takes a random sample of 81 items from the first population.
With a population standard deviation of 15. Use the 95% confidence interval. Approximately how many Kleenexes should go in the automobile glove compartment boxes?
During the 2003 season, MLB took steps to speed up the play of baseball games in order to maintain fan interest; the following results come from a sample of 60 games played during the summer of 2002. And a sample of 50 games played during the summ..
Wwith a standard deviation of 1.7 grams. Assuming the distribution of weights is normally distributed, 4% of whooping crane eggs weigh less than how many grams?
What are the relevant hypotheses? Perform an appropriate parametric statistical procedure to test these hypotheses and briefly explain your results (a level = 0.05).
Develop the 5-Step Hypothesis Test for a particular claim related to your work or life environment. (This should be a test of one-sample mean or one-sample proportion.
A political science professor is interested in finding out whether there is a relation between political affiliation and attitude towards a recent supreme court ruling about challenges to federal affirmative-action programs.
Suppose that you perform a significance test regarding a population mean and that the evidence does not warrant rejection of the null hypothesis.
A simple random sample of 64 observations was taken from a large population. The sample mean and the standard deviation were determined to be 320 and 120 respectively. The standard error of the mean is?
A movie theater owner wanted to know how many people hated commercial at the beginning of movies if less then 10% hated the commercials the he would leave them.
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