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h-p is said to be the leading seller of pc's in the U.S WITH 27% share of the pc market. if a researcher selects 130 recent pc purchases, use the normal approximation to the binomial to find the probability that more than 39 bought a h-p computer
How does the efficiency of a regression predict the power of the t-test? How do robust standard errors change the comparison between hypothesis testing using OLS and robust regression? What does dependence in the e do to the t-test? what does non-no..
The results of a recent poll on the preference of shoppers regarding two products are shown below.
X is a continuous random variable uniformly distributed on [20, 45] that is, the end points c = 20 and d = 45.
According to Advertising Age, average base salary for women working as copywriters in advertising firms is higher than average base salary for men. The average base salary for women is $67,000 and the average base salary for men is $65,500 (Workin..
The sample data are summarized by the statistics n = 27, x = 4.6 years, s- 1.9 years.
Answer the following three questions based on what you know about statistics now.
Find the best point estimate of the mean salary of all NCAA football coaches.
Find a 99% confidence interval for the difference in the mean number of calls between night and day.
Find out the operating characteristics for this system.
Depends on the satellite information illustrate what is the expected number µ of real forest fires on the Seward Peninsula.
Bob Billy is an operations analyst for Dollar-Does-It stores based in Iva, SC. He is currently studying the order and stocking policies for top-selling toy.
The population of incomes in a particular community is thought to be highly right-skewed with a mean equal to $36,789 and a standard deviation equal to $2,490.
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