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Question : The mean of a normal probability distribution is 60; the standard deviation is 5.
(a) About what percent of the observations lie between 55 and 65?
(b) About what percent of the observations lie between 50 and 70?
(c) About what percent of the observations lie between 45 and 75?
What is the probability that the mean contents of a six-pack are less than 12 ounces and what is the chance I find at most two defectives in the sample
Write ten-step study plan with suitable example that will permit you to analyze your data.
Compute standard error of mean? Compute the margin of error, with 95% confidence.
Let x be average number of employees in group health insurance plan and y be average administrative cost as percentage of claims. Determine sample correlation coefficient.
Then estimate demand again with a weighted moving average in which sales in the most recent year are given a weight of 2 and sales in the other two years are each given a weight of 1.
Draw a simulation experiment for car agency and simulate using fleet of four rental cars for 10 days.
Complete the table and answer the following questions. Use the .05 significance level.
Test the claim that the mean age of the prison population in one city is less than 26 years. Sample data are summarized as n = 25, x = 24.4 years, and s = 9.2 years. Use a significance level of α = 0.05.
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots. A partial ANOVA table
Determine the calculated value of the test statistic? What distribution does test statistic have when null hypothesis is true?
Of the nine members of the board of trustees of a college, five agree with president on a certain issue. The president selects three trustees at random and asks for their opinions. What is the probability that at least two of them would agree with..
The lifetime of a 2-volt non-rechargeable battery in constant use has a Normal distribution with a mean of 516 hours and a standard deviation of 20 hours. The proportion of batteries with lifetimes exceeding 520 hours is approximately.
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