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Recent test scores on the Law School Admission Test (LSAT) are normally distributed with a mean of 162.4 and a standard deviation of 15.9. What is the probability that the mean of 12 randomly selected scores is less than 161?
Internet is 13.4 hours per week, with the sample standard deviation of 6.8 hours. Determine the 95 percent confidence interval for mean time Wired subscribers spend on Internet.
In a carnival game the players selects two coins from a bag containing two silver dollars and six slugs. Write down the probability distribution for the winnings and determine how much the player would have to pay so that he would break even, on t..
it is the responsibility of the federal government to judge the safety and effectiveness of new drugs. there are two
Suppose 8 cups of coffee are served to a subject, where for each cup a coin is flipped to determine if regular or decaf coffee is poured.
a sample of 36 receipts at the theater concession stand has a mean total of 18.927 with a standard deviation of 3.883.
Draw a graph for the standard normal distribution. Label the horizontal axis at values of -3, -2, -1, 0, 1, 2, and 3.
The figure shows a scatterplot of the heights and weights of some women taking statistics.
Based on observations of a few third graders in the lunch line, they assess P(P) as 0.75. More convincing evidence that P(P) is .75 would be?
computer services inc. wants to determine a confidence interval for the average cpu time of their teleprocessing
Does being single cause an increased risk of violent crime? Describe a potential confounding variable that illustrates why it is unreasonable to conclude that a change in marital status causes a change in crime risk.
For what proportion of patients will drug be effective for between 2 and 2.25 hours?
For 1
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