04/14/15

The population mean height of a basketball player is 200 cm
1.      The population mean height of a basketball player is 200 cm with a standard deviation of 15 cm. In a sample of 40 basketball players, what is the probability of getting a sample mean height... more
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01/04/15

The only issue I have is finding the sample standard deviation.... I've got everything else figured out. Please show the steps to getting the answer to s.
Twelve different video games showing substance use were observed and the duration times of game play (in seconds) are listed below. The design of the study justifies the assumption that the sample... more
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12/08/14

A two-tailed test is performed at a 5% level of significance. The p-value is determined to be 0.09. The null hypothesis
A two-tailed test is performed at a 5% level of significance. The p-value is determined to be 0.09. The null hypothesis
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12/08/14

Read the t statistic from the table of t distributions and circle the correct answer. A one-tailed test (upper
Read the t statistic from the table of t distributions and circle the correct answer. A one-tailed test (upper tail), a sample size of 18 at a .05 level of significance t =
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12/08/14

Z is a standard normal random variable. The P(1.20<= z <=1.85) equals?
Z is a standard normal random variable. The P(1.20<= z <=1.85) equals?
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11/11/14

Starting salaries of 64 college graduates who have taken a statistics course have a mean of $44,500 with a standard deviation of $6,800.
Find an 90% confidence interval for μ.
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10/28/14

For women aged 18-24, the systolic blood pressure (in hg mm) are normally distributed with...
...a mean of 114.8 and a standard deviation of 13.1 100 women between 18 and 24 are randomly selected, let t represent the systolic pressure of 100 women 100 women between 18 and 24 are randomly... more
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