Reference no: EM131089668
4. Given the following data set:
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x
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1
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3
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7
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9
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13
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15
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y
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1
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5
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8
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10
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11
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13
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Find the correlation coefficient.
Using this to predict the value of y when x = 2.
Find the root mean square error.
5. For 1000 men age 18 - 24 in the HANES sample
Average height (X) = 75 inches SDx = 3 inches
Average weight (Y) = 160 pounds SDy = 20 pounds
Correlation r = .6
One man in the sample was 65 inches tall what is his expected weight?
6. In a certain class, midterm score average out 70 with an SD of 15, as do scores on the final. The correlation between midterm scores and final scores is about 0.40. The scatter diagram is football-shaped.
a. Predict the final score for a student whose midterm score is
(i) 75 (ii) 30 (ii) 60 (iv) unknown
b. Predict the midterm score for a student whose final score is 45.
c. Apparently low-scoring students on the midterm do better on the final, but low -scoring student on the final did better on the midterm. How is this possible?
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Obtaining information on a population vs information
: Statistics students frequently confuse obtaining information on a population vs information on a sample. Suppose you are a researcher interested in studying one aspect of childhood obesity. You decide to look at the BMI of fifth grade boys in the ..
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Compute the rate of simple interest per annum
: When purchased on hire purchase over two years there is a deposit to pay of £140 and 24 monthly payments of £26. (a) In each case calculate the rate of simple interest per annum charged on the initial amount borrowed.
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Describe the general adaptation syndrome
: Describe and provide two concrete examples of the active prevention strategies described in Chapter 6. Describe three different models explaining why people continue to smoke over time. Do you smoke? If so do these seem to fit your use pattern?
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Percentage of the net annual premium
: A delivery van can be insured for a net annual premium of £861.64. The net premium may be paid in 52 equal weekly installments, but then a charge of £1.10 is added to each installment.
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Correlation between midterm scores and final scores
: 6. In a certain class, midterm score average out 70 with an SD of 15, as do scores on the final. The correlation between midterm scores and final scores is about 0.40. The scatter diagram is football-shaped.
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Discount for prompt payment
: A store orders 100 hammers and 50 chisels from a supplier in Belgium. The hammers cost €5.30 each, and the total cost of the order, before discount, is €775.
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The long run this change will shift the industry
: If firms enter a purely competitive industry, then in the long run this change will shift the industry: Demand curve to the left, and the individual firm's demand curve will shift down. Demand curve to the right, and the individual firm's demand curv..
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The specific cancer site from the section drop-down menu
: 1) What is the estimated number of new cancer cases for 2016, for all cancer sites combined? 2) What are the Top 3 Cancer Sites for Incidence (both sexes, all races)
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Unemployment insurance benefits would influence
: Do you think unemployment insurance benefits would influence the unemployment rate? Suggest some actions that the U.S. government might take to create more jobs.
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