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Stat 200 Week 7
  • From Mathematics, Statistics
  • Due on 21 Mar, 2015 07:49:00
  • Asked On 18 Mar, 2015 05:51:39
  • Due date has already passed, but you can still post solutions.
Question posted by
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13. Consider the data.

x

26

29

32

34

36

37

40

 

 

y

48

68

66

69

76

67

84

 

 

 

Find y-predicted when x = 30.

 

(a) Draw the scatter plot for the variables.

Use Excel or other program. Copy/paste in a Word file. 

(b) Compute the correlation coefficient. Use three decimal places.

Use technology. If you use the formula do not show me the computations.

(c) Find the equation of the regression line.

(d) Find the predicted y-value for the specified x-value.

(e) Test r for statistical significance using α = 0.05.

 

 

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Stat 200 Week 7 Solution
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  • Submitted On 19 Mar, 2015 07:05:55
Solution posted by
solution

The test statistic = r*√((n-2)/(1-r^2 ))=0.8611*√((7-2)/(1-〖0.8611〗^2 )) = 3.787
Df = n-2 = 7-2 = 5
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