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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MAC 1105  –  TEST #2:    (2.3 – 2.7) QUESTIONS #4,  6,  AND  13  REQUIRE YOU TO GRAPH FUNCTIONS BY HAND.  WHILE STILL WITHIN HONORLOCK, YOU MUST PRESENT YOUR THREE GRAPHS TO YOUR WEBCAM TO VERIFY YOU HAVE GRAPHED THEM BY HAND DURING THE TEST.    THEN ONCE YOU SUBMIT YOUR TEST TO HONORLOCK AND COME BACK TO TEAMS TO CHECK OUT, YOU WILL HAVE FIVE MINUTES TO SCAN AND UPLOAD THOSE GRAPHS TO THE CANVAS ASSIGNMENT CALLED:   TEST  #2  GRAPHS.   IF THOSE ANSWERS ARE NOT EMAILED TO ME WITHIN THAT TIME LIMIT, NO CREDIT WILL BE GIVEN FOR THOSE QUESTIONS. KEEP YOUR WORK NEAT, ORGANIZED, AND NUMBERED ON YOUR SCRAP PAPER IN CASE THERE ARE ANY  YOU WANT ME TO LOOK AT FOR PARTIAL CREDIT. If there are any questions you missed and want me to review for possible partial credit, you will have 5 minutes to scan your work and upload it to the Canvas Assignments called:  WORK SHOWN FROM TEST #2 ( 2.3 – 2.7) 

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.