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The average score of local students on a college entrance exam is 110, with a standard deviation of 5. The distribution is roughly bell shaped. Use the Empirical Rule to find the percentage of local students with scores above 120.  

Find the mean, median, and mode of the following statistic students’ test scores:58 61 54 58 51 59 58 52 53 56 Just write: Mean=? Median=? Mode=?

Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal distribution. A sample of 25 randomly English majors has a mean test score of 81.5 with astandard deviation of 10.2. Round to the nearest hundredth. (Use )

In a mechanical system, which force has the mechanical advantage?

Find the area under the standard normal curve between  and .

Find the standardized test statistic estimate, , to test the hypothesis that . Use α = 0.01. The sample statistics listed below are from independent samples.Sample statistics: ,  , and  ,

Given the linear correlation coefficient , determine the coefficient of determination, 

Find the test statistic, , to test the hypothesis that

Determine the standardized test statistic, z, to test the claim about the population proportion  given and

Many people think that a national lobby’s successful fight against gun control legislation is reflecting the will of a minority of Americans. A random sample of 4000 citizens yielded 2250 who are in favor of gun control legislation. Estimate the true proportion of all Americans who are in favor of gun control legislation using a 90% confidence interval. Express the answer in the form