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Given are five observations collected in a regretion study on two variables:
x 2 6 9 13 20
y 7 18 9 26 23
a) What is the value of the standard error of the estimate?
b) Test for a significant relationship by using the t test Use a=.05
The data consists of random sample of 30 households from the 2007 American Community Survey. Construct a frequency distribution and a histogram for each data set.
For the most recent year available, the mean annual cost to attend a private university in the United States was $20,182. Assume the distribution of annual costs follows the normal probability distribution and the standard deviation is $4,400.
Problems on Sampling Variability and Standard Error and Confidence Intervals
Which of the following statements is true regarding a nonparametric test? We assume that the data has been chosen from a normally distributed population
Five homes were recently sold in Oxnard Acres. Four of the homes sold for $400,000 while the fifth home sold for $2.5 million. Which measure of central tendency best represents a typical home price in Oxnard Acres?
Assume the arrival of these emails i3 approximated by the Poisson distribution.
Find out 90% confidence interval for mean grade of all the students in the class.
What is the maximum error of estimate for p ?
Using a separate 2 by 2 table, compute predictive value positive and predictive value negative for population of 1,000 drug users.
What would you recommend Taylor do to cut back its labor cost? (Illustrate using an ABC plan.)
The average age of the students in the sample was 23 with a standard deviation of 3.5: a) Formulate the hypotheses for this problem.
Many people attend work and produce little or nothing of value that is why they are terminated.
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