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(a) A cut-off score of 85 has been established for a sample of scores in which the mean is 65. If the corresponding z-score is 2.5 and the scores are normally distributed, what is the standard deviation?
(b) The standard deviation of a normal distribution is 12 and 95% of the values are greater than 6. What is the value of the mean?
(c) The mean of a normal distribution is 132, and only 10% of the values are greater than 155. What is the standard deviation?
shown below are rental and leasing revenue figures for office machinery and equipment in the united states over a
Using the empirical rule what percentage of adults is 25 - 45 has iq score bet 70 and 130.
it has been stated that 75 of the population have a smart phone. if you randomly choose 10 people what is the
a local health center noted that in a sample of 400 patients 80 were referred to them by the local hospital.a. provide
Canine Gourmet Super Breath dog treats are sold in boxes labeled with a net weight of 12 ounces (340grams) per box. Each box contains eight individual 1.5 ounce packets. To reduce the chances of shorting the customer, product design specifications..
assume that a procedure yields a binomial distribution with a trial repeated ntimes. use a binomial probabilities table
Statistics utilizes math and science in its application. So, why do you need to be an effective writer when using statistics
Dealing with a large collection of categories complicates a regression, and software does not always provide the needed tools. The following procedure is often helpful.
listed below in order by row are the annual high values of the dow jones industrial average for each year beginning
Solve Prob. 19.7-3 for a two-period model, assuming no salvage value, no backlogging at the end of the second period, and no discounting Prob. 19.7-3
The philosophies that created the US Constitution were a political experiment, one that had never been tried before. Write an analysis of the influence and changes for each of the following democratic republican ideals ideals.
1. given the sample mean is 34020 the sample standard deviation is 2200 n 32 determine the 90 confidence interval
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