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Determine the critical value Za/2 that corresponds to 94% level of confidence.
Compute the 90% confidence interval about m if the sample size, n, is 55. How does does increasing the sample size affect the margin of error, E?
The residents play both shuffleboard and poker, find the probability that a resident plays poker, given that they garden (that is, find P(poker | garden).
Find a 90% confidence interval for the mean amount spent by patients at the pharmacy. Show your calculations and/or explain the process used to obtain the interval.
In a bumper test, three types of autos were deliberately crashed into a barrier at 5 mph, and the resulting damage (in dollars) was estimated.
A robot, when working properly, produces 5% or less defective items. whenever the robot produces more than 5% defective items, needs repair.
Marie claims she can predict the sex of pregnant women's babies for first-time new mothers. She sees 1000 women a year, and she always predicts a female. She charges $1000 for a prediction
A flour mill produces flour in small bags before distributing them to wholesalers. The average weight of each bags is 8 kg with a standard deviation of 0.5 kg.
At.05 significance level, is there a difference in mean number of calls per day between 2 employees? Compute the p -value?
Based on a survey of over 10,000 households, the number of televisions in the home was recorded as given in the table below. Based on the data, find the expected number of televisions in a home.
The major shopping areas in community of Springdale include Springdale Mall, West Mall, and downtown area on Main Street. A telephone survey has been conducted to determine strengths and weaknesses of these areas and to find out how they fit in th..
What is a nonparametric procedure? Describe specifically when you would utilize a nonparametric test. Under what conditions should you use the Wilcoxon sum rank test?
The heights of 20- to 29-year-old females are known to have a population standard deviation 1) = 2.7 inches. A simple random sample of n = 15 females 20 to 29 years old results in the following data
Suppose wheat and sugar are two basic ingredients necessary to bake two items: a loaf of bread and a muffin. A baker has 25 pounds of wheat and 5 pounds of sugar.
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