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1. What is the probability that a sample mean from a sample size 16 lies above 145 lb?
2. Find P95, the 95th percentile for the population of women's weights.
3. Find P95, the 95th percentile for the population of means for samples of size 16.
A manufacturer claims that the mean life of batteries manufactured by his company is at least 44 months. A random sample of 40 of these batteries was tested, resulting in a sample mean life of 41 months with a sample standard deviation of 16 month..
suppose the heights of sons and fathers has a correlation of 0.6 and both sons and fathers have an average height of 68
find the mean and standard deviation of this population. List all possible swamples of size 2. Find the sample average for each sample.
You are a consumer psychologist interested in holiday spending. A national census reports that the American family spent an average of u = 101$ for Halloween candy and costumes last year. A sample of n families this year produced a mean of xbar = ..
Based on the expected value of the lottery ticket, would you pay $1 for a ticket? Round the answer to 3 decimal places. Omit the "tiny_mce_markerquot; sign in your response.)
the mental development index mdi of the bayley scales of infant development is a standardized measure used in
Testing for a linear correlation. Construct a scatter plot, find the value of the linear correlation coefficient r, and find the critical values of r from the table below using a=0.05.
individuals filing federal income tax returns prior to march 31 received an average refund of 1056. consifer the
Forecast quarterly demand where x = 0 in second quarter of last year. Quarterly seasonal factors are Q1=1.5, Q2=0.8, Q3=1.1, Q4=0.6. Determine the forecast for last quarter?
A random sample of 550 automobiles on the road shows that 219 of them have Goodyear tires. Conduct the test at α = 0.01.
Use the expected value approach to decide whether to market the new product. Because of the high dollar values involved, especially the possibility of a $100,000 loss.
the irs reported that 62 of individual tax returns were filed electronically in 2008. a random sample of 225 tax
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