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A sample of final exam scores is normally distributed with a mean equal to 28 and a variance equal to 25.
a. What percentage of scores are between 23 and 33? (Round your answer to two decimal places.)
b. What raw score is the cutoff for the top 10% of scores? (Round your answer to one decimal place.)
c. What is the proportion below 19? (Round your answer to four decimal places.)
d. What is the probability of a score less than 37? (Round your answer to four decimal places.)
A local historian knows that the age of artifacts in his library is Normally distributed with an average of 76 years old with a standard deviation of 14 years.
A cohort study was designed to look at the association of pesticides and the occurrence of childhood leukemia. Children living in rural areas were followed and leukemia rates were compared between those children living in areas with high and low p..
Based on past data, the Student Recreation Center knew that the proportion of students who prefer exercising outside over exercising in a gym was 0.734. To update their records, the SRC conducted a survey. Out of 95 students surveyed, 76 indicated..
You are advertising on two television programs that achieve the reach percentages listed. What is their combined reach?
a. What is the independent variable and what are its levels? What is the dependent variable? b. Is this a between-groups or within-groups design? Explain.
Assume the branch manager requested estimates of the mean selling price of Gulf View condominiums with a margin of error of $40,000 and the mean selling price of No Gulf View condominiums with a margin of error of $15,000. Using 95% confidence, ho..
A researcher hypothesized that the average number of sports that colleges offer for males is greater than the average number of sports that colleges
Describe the use of normal probability plot to evaluate whether a set of data is normally distributed?
Find a 95% confidence interval for the mean amount of interest it could gain if each of its customers paid exactly one day more promptly.
consider the number of subsets of a set with nelements. use the fact that there are cnk subsets of k elements with
Does the process appear to have been in control? Determine control limits for future production.
an article recommended the following estimated regression equation for relating y vo2max lmin a measure of
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