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The ages of cars owned by all employees of a large company have a bell shaped distribution with a mean of 8 years and a standard deviation of 2 years. Using the empirical rule, find the approx. percentage of cars (owned by those employees) that are between 2 and 14 years old.
Use a 0.05 significance level to test the claim that king-size cigarettes with filters have a lower mean amount of nicotine than the mean amount of nicotine in non-filtered king-size cigarettes.
Compute the range and interquartile range
A journal polled its readers to determine the proportion of wives who, if given a second chance, would marry their husband again.
Examined the effect of body position on blood pressure
An experiment was conducted to determine the effects of three different pesticides (P1,P2,P3) on the yield of three different varieties of citrus tree (V1,V2,V3).
Perform a hypothesis test by using.04 level of significance to find out if there is a difference between the population means.
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
If you have a statistical package that computes binomial probabilities, find the probability that at least five funds outperform the market in all 10 years.
The scores of college-bound senior men on the math part of the SAT followed a normal distribution with mean 527 and standard deviation 116.
What is the probability that a visually impaired student gets less than 6.9 hours of sleep?
The standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was
If a technical breakthrough occurred that raised the profit per unit of X 1 to $3, would this affect the optimal solution?
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