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Parental pressure to succeed in school. A Pew Research Center Poll used telephone interviews to ask American adults if parents are pushing their kids too hard to succeed in school.
Of those responding, 64% said parents are placing too little pressure on their children. Assuming that this is an SRS of 1200 U.S. residents over the age of 18, give the 95% margin of error for this estimate.
the shear strength of each of ten test spot welds is determined yielding the following data psi409 382 389 386 377 358
Consider the following results for two samples randomly taken from two populations. Construct a 99 percent confidence interval estimate of the difference between the two sample means.
Find a 95% jackknife con?dence interval for the population mean mileage of the rental cars of this company.
Draw a bar chart of the percents found in parts (b) and (c) to show the relationship between the letter listed first and the letter picked.- Explain whether or not you think the letter listed first in the question affected the choice of letter.
if the null hypothesis for the f-test has been rejected a researcher can use either the scheffe or tukey test to
Suppose the horses in a large stable have a mean weight of 1464 lbs, and a standard deviation of 111. What is the probability that the mean weight of the sample horses would differ from the population mean by less than 11 lbs if 34 horses are samp..
a survey has discovered that the amount of money that a family of four spends on food per week is approximately
Give an example of when the F-statistic would be a useful value in data analysis. Provide details of what you would measure and how the F-statistic would be used.
A random sample of 10 yields the following thicknesses (in millimeters): 0.0048, 0.0053, 0.0051, 0.0051, 0.0052, 0.0049, 0.0051, 0.0047, 0.0054, 0.0052. Find the average loss per reel.
suppose that the probability that a person between the ages of 19 and 24 checks their daily horoscope is 0.12. if 400
New study is to use 90% confidence level. Estimate is to be within 1 percent of population proportion. Determine the essential sample size?
(a) Plot the quarterly number of tourists to Table Mountain for 2009 and 2010. (b) Calculate the de-seasonalised values for each quarter and plot on the same axis. Comment on the trend in the number of tourists visiting Table Mountain.
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