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A national caterer determined that 37% of the people who sampled their food said that it was delicious. A random sample of 144 people is obtained from a population of 5000. The 144 people are asked to sample the caterer’s food. If

Construct a 95% confidence interval for the population mean, μ. Assume the population has a normal distribution. A sample of 20 part-time workers had mean annual earnings of $3120 with a standard deviation of $677.  Round to the nearest dollar. (Use )

Use the given linear correlation coefficient

A study was designed to investigate the effects of two variables – (1) a student’s level of mathematical anxiety and (2) teaching method – on a student’s achievement in a mathematics course. Students who had a low level of mathematical anxiety were taught using the traditional expository method. These students obtained a mean score of 380 with a standard deviation of 20 on a standardized test. Assuming a bell-shaped distribution, where would approximately 95% of the students score?

Is there a relationship between the raises administrators at State University receive and their performance on the job? A faculty group wants to determine whether job rating (x) is a useful linear predictor of raise (y). Consequently, the group considered the straight-line regression model,

A small computing center has found that the number of jobs submitted per day to its computers has a distribution that is approximately bell shaped, with a mean of 75 jobs and a standarddeviation of 8. Where do we expect approximately 95% of the distribution to fall?

A national caterer determined that 87% of the people who sampled their food said that it was delicious. A random sample of 144 people is obtained from a population of 5000. The 144 people are asked to sample the caterer’s food. If

A university dean is interested in determining the proportion of students who receive some sort of financial aid. Rather than examine the records for all students, the dean randomly selects 200 students and finds that 118 of them are receiving financial aid. Use a 95% confidence interval to estimate the true proportion of students on financial aid. Express the answer in the form

In a health food store, Jenny and Kevin create a trail mix from dried fruit, nuts, and granola. They buy 2 pounds of dried fruit at $4.00 per pound, 5 pounds of nuts at $3.00 per pound, and 3 pounds of granola at $3.50 per pound. Determine the cost per pound of the mix.

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