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Compare the standard deviation for the heights of males and the standard deviation for the heights of females in the class. Compare the values and explain what can be concluded based on the numbers.
On any given day, about 45% of the stocks on the American Stock Exchange increase in value. A random sample of four independent stocks is chosen.
test the hypothesis that the intake of linoleic acid in this group is lower than that of the general population. Also, compute a p-value for the hypothesis test.
The random variable x has a normal distribution with mean=30 and standard deviation=30, find the probability that x assumes a value more than two standard deviations from its mean. more than three standard deviations from the mean.
Please use the five-step process for hypothesis testing. The Connecticut Board of Education is concerned that first year female high school teachers are receiving lower salaries than their male counterparts.
Over the past 50 years, the number of hurricanes that have been reported are as follows: 9 times there were 7 hurricanes, 14 times there were 8 hurricanes, 19 times there were 11 hurricanes, and in the remaining years there were 14 hurricanes. Wha..
Calculate a 99% confidence interval for the true mean difference between pretreatment and after treatment testosterone levels of young male TBI patients.
Four students riding to school together offer a the excuse of a flat tire on their car for missing a test. On the makeup test, the professor asks the students to each identify the tire that went flat.
A research report summarizes the results of the hypothesis test by stating,"z = 2.13, p
The estimated miles per gallon ratings of a class of automobiles are normally distributed with a mean of 12.8 and a standard deviation of 3.2. What is the probability that one of these automobiles selected at random would get:
The statistical research was done primarily through the internet from governmental regulated sources. Estimates were used in consideration of absence of actual information.
Find a 95% confidence interval for the population mean selling price of all homes in this neighborhood.
Test hypothesis that people in State A are more depressed than U.S. population. Illustrate all of your hypothesis steps. (Use alpha = .01.)
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