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Question: Scores are obtained from the Law School Admission Test (LSAT) are normally distributed with a mean score of 550 and a standard deviation of 110.
a. If a test score is selected at random, find the probability that it is less than 750.
b. If the top 15% of the test scores are usually good enough for admission to law school, find the cut off score for gaining admission.
An insurance company has gathered the following information regarding the number of accidents reported per day over a period of 100 days.
At the heart of quantitative research is regression analysis. A regression model simply measures the association of two variables - variation: the dependent variable's observed value
Give 0.95 probability bounds on the value of the sample mean that would be obtained. Also give 0.90 probability bounds on the value of the sample mean.
In an Asian country with a population of 6 million people, 60,000 deaths occurred during the year ending December 31, 1995. . What was the cause-specific mortality rate from cholera in 1995?
Assume that a decision maker wants to estimate a population proportion with 90% confidence and a margin of error of ±0.03. The decision maker has obtained a pilot sample of 10.
There're several measures of central tendency. By far the most frequently utilized of these measures is mean of population. Remember that the source of the data that you want to analyze always comes from what is called a population.
Construct the 95% confidence interval estimate of the mean number of migraine attacks for those treated with acupuncture.
Assume the population standard deviation is 7.1 mpg. State the correct null and alternative hypotheses that the company wishes to test. Calculate the test statistic that would be used for conducting the desired test.
Nicotine patches are often used to help smokers quit. Does giving medicine to fight depression also help? A randomized double blind experiment assigned 244 smokers to receive nicotine patches and another 245 to receive both a patch and the antidep..
Calculate the probability that a random sample of 40 children's full-length movies produces an average length of 85 minutes or more.
analyze the monthly returns for freddie mac since august 1 1989.step 1 download the monthly returns for freddie mac
The probability of obtaining a random sample mean, which is lower than the population mean, is:
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