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to estimate the mean height u of male student on your campus, you will measure an SRS of students. Heights of people of the same sex and similar ages are close to Normal. You know from govt data that the standard deviation of the heights of young men is about 2.8 inches. suppose (unknown to you) the mean height of all male students is 70 inches.
you measure 25 students. what is the sampling distribution of their average height x bar?
You wish to evaluate the proportion of customers who are satisfied with their supermarket at level of confidence of .92 and in .025 of true value. How large of sample is required?
Find out the constant using probability density function also cumulative distribution function. Assume X be a continuous random variable with probability density function.
For a group of 10 men subjected to a stress situation, the mean number of heartbeats per minute was 126, and the standard deviation was 4. Find the 95% confidence interval of the true mean.
What is the difference between resampling (bootstrapping) and double sampling in research? Is there any difference or is the same? Please explain your response?
30% of college freshmen support increased military spending. If 12 college freshmen are randomly selected, find the probability that more than 5 selected students support increased military spending.
How many treatments are there? What is the total sample size? Is there a significant difference at the 5% Level of significance? Would I accept or reject the null Hypothesis.
Assume that you want to use a 0.05 significance level to test the claim that paired sample data come from a population for which the mean difference is Ud = 0. Find (a) d-, (b) Sd, (c) the t test statistic, and the critical values.
Testing for Population mean - Based on this sample evidence, is Joan's supervisor correct? Use a = .05.
A large electronics company wants to estimate the proportion of all households that own GPS machines. What sample size is required that would give the maximum error of 2.0% for a 95% confidence interval? An unscientific survey had a result of 30%.
Explain how probability is used in that situation. Identify the type of probability your example best fits by explaining whether it is an independent event or dependent upon something else.
Identify the regression equation and make the prediction. Show your procedure, or explain how you reached your answer. Costs of Television: Find the best predicted quality score of a Hitachi television with a price of $1900. Is the predicted qualit..
A bank wants to get new customers for their credit card. They try two different approaches in their marketing campaign. The first promises a "cash back" reward; the second promises low interest rates. A sample of 500 people are mailed the first br..
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