Age 58 69 43 39 63 52 47 31 74 36 Cholesterol level 189 235 193...

Age	58	69	43	39	63	52	47	31	74	36
Cholesterol level	189	235	193	177	154	191	213	165	198	181

(3) (Continued from Question 2) Based on the sample of 10 men with ages and cholesterol levels given in the table in Question 2, answer the following.

(a) At 5% significance level, do the data provide sufficient evidence to conclude that age is useful as a (linear) predictor of cholesterol level? State any assumption(s) you make.

(b) What is the mean estimated cholesterol level for all 74 year old men?

(c) Find a 90% confidence interval for mean cholesterol level for all 74 year old men.

(d) Find a 90% prediction interval for mean cholesterol level for all 74 year old men.

(e) If we wish to add one dummy predictor variable to make a multiple regression model, what would it be?

please show me the math for this

Expert Solution

orchestra answered 1 year ago

43 77 36 40 47 47 39 33 51 43 34 41 31 32 31 23...

43 77 36 40 47 47 39 33 51 43 34 41 31 32 31 23 50 41 43 45 50 44 41 45 40 33 42 25 41 36 38 33 26 54 44 49 21 26 37 43 32 45 38 40 25 62 41 62 45 37 44 43 41 33 37 25 37 40 32 42 56 34 47 52 39 47 41 44 49 34 43 48 49 41 31 48 First, sort the data....

0, 3, 11, 24, 36, 47, 42, 53, 56, 59, 52, 58, 50, 64, 63, 61,...

0, 3, 11, 24, 36, 47, 42, 53, 56, 59, 52, 58, 50, 64, 63, 61, 65, 78, 89, 91 A. Calculate the mean, median, and mode. B. Which measure, mean or median, best describes the central tendency of this data? Why?

1. Make a box-plot for the following data: 34 36 39 43 51 53 62 63...

1. Make a box-plot for the following data: 34 36 39 43 51 53 62 63 73 79 2. The blood pressure of 40 women have a mean of 110.8 mm hg and a standard deviation of 17.1 mm hg. Is a measurement of 181 mm hg unusual?

Age Group Midpoint Diastolic Blood Pressure 5 60 7 63 9 69 11 74 13 75...

Age Group Midpoint Diastolic Blood Pressure 5 60 7 63 9 69 11 74 13 75 15 71 17 77 19 85 21 78 a. Which of these variables - age group or blood pressure - are the independent and dependent variables? Independent: Age ? Dependent: Blood Pressure ? b. Find the regression equation which best describes the relationship between these variables. Y = a + bx? c. Calculate the correlation coefficient for this regression equation for this sample.

Age (years) 74 68 63 55 50 45 38 31 26 21 16 Time (hours) 0...

Age (years) 74 68 63 55 50 45 38 31 26 21 16 Time (hours) 0 2 4 6 8 10 12 14 16 18 20 1. Find the equation of a linear regression line for the data where age is the independent variable, x, and time is the dependent variable. (Enter a mathematical expression. Round your numerical answers to three decimal places.) ŷ = 2. Using the equation from part (a), estimate the number of hours a person 30...

The actual values for 12 periods (shown in order) are: (1) 45 (2) 52 (3) 48 (4) 59 (5) 55 (6) 55 (7) 64 (8) 58 (9) 73 (10) 66 (11) 69 (12) 74

Question 1 contains the actual values for 12 periods (listed in order, 1-12). In Excel, create forecasts for periods 6-13 using each of the following methods: 5 period simple moving average; 4 period weighted moving average (0.63, 0.26, 0.08, 0.03); exponential smoothing (alpha = 0.23 and the forecast for period 5 = 53); linear regression with the equation based on all 12 periods; and quadratic regression with the equation based on all 12 periods. Round all numerical answers to two...

1.The actual values for 12 periods (shown in order) are:(1) 45 (2) 52 (3) 48 (4) 59 (5) 55 (6) 55 (7) 64 (8) 58 (9) 73 (10) 66 (11) 69 (12) 74