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The mean height of women in a country (age 20-29) is 64.3 inches. A random sample of 75 women in this age group is selected. what is the probablity that the mean height for the sample is greater than 65 inches?
Compare and contrast a Difference of Means test with a Paired Difference test. What, fundamentally, are we testing for in each? When do you use the difference of means?
A company requires its secretarial employees to demonstrate his/her ability to type more than 45 words per minute in a typing test.
A survey of 300 union members in New York reveals that 112 favor the Republican candidate for governor. Construct the 98% confidence interval for the true population proportion of all New York State union members who favor the Republican candidate..
Find the minimum sample size needed using a prior study that found that 36% of the respondents said they support abolishing the penny.
Construct a sample space using a tree diagram - Which of the following three sets of probabilities are inappropriate because they violate a basic rule of probability
What is the probability of finding 1 or more children with chronic bronchitis in a population where the incidence rate of chronic bronchitis is 10% (like the one above?)
A customer from Cavallaro's Fruit Stand picks a sample of 5 oranges at random from a crate containing 80 oranges, of which 6 are rotten. What is the probability that the sample contains 1 or more rotten oranges? (Round your answer to three decimal..
Using the following information, find the equation of the regression line, and predict the heart rate when 0.27 milligrams of the drug is used.
In 1990, 5.8% of job applicants who were tested for drugs failed the test. At the 0.01 significance level, test the claim that the failure rate is now lower if a simple random sample of 1520 current job applicants results in 58 failures. Does the ..
Perform the 5 steps of hypothesis testing procedure. Please present the calculations and results and Graphs. Make all possible observations and interpret the results
There are four entrances to the Government Center Building in downtown Philadelphia. The building maintenance supervisor would like to know if the entrances are equally utilized.
Based on a simple random sample of one hundred an analyst estimates the average hourly wage earned by workers in a city to be $30 and computes the margin of error to be $5. Can we conclude from this that most workers there earn between $25 and $35..
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