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Estimate the population mean based on a sample of size 25 for which the average is 100 and the standard deviation is 25. Answer the following questions about constructing the 80 percent confidence interval for the population mean.
What is the best point estimate of mean?
What value of z/t should be used for this interval?
What is the standard error for this interval?
What is the margin of error for this interval?
What is the low value for this interval?
What is the high value for this interval?
if p .05 the critical value for rejecting the null hypothesis
a teacher gave a reading test to a class of 5th grade students and computed the mean median and mode for the test
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explain in what sense that percentile ranks and standard scores are similar to one another? be sure to include an
Make a worksheet in Excel for your calculations. (b) Make a histogram of the data. Would you be justified in using a parametric t test that assumes normality?
provide me a half page response to the below discussion post.to review my employment is at a university where my
Write all the possible samples of size 2 and calculate the average or median of each one.
Approximately normally distributed with σ=10. Determine the probability that a randomly selected chocolate bar will have: 4.3 more than 155 calories.
The Speedy Oil Change Company advertised a 15-minute wait for an oil change. A sample of 23 oil changes showed a mean time of 16.5 minutes and a standard deviation of 4.3 minutes.
The survey reported that 31% of the respondents feel they have to save more for retirement to make up for what they lost. Develop a 95% confidence interval for the population proportion.
A study published in the New England Journal of Medicine (Aug. 2001) suggests that it's dangerous to enter a hospital on a weekend. During a 10-year period, researchers tracked over 4 million emergency admissions to hospitals in Ontario, Canada. T..
a facilities manager at a university reads in a research report that the mean amount of time spent in the shower by an
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