2. The mean speeds of fastball pitches from two baseball pitchers will be compared. A sample of 14 fastball pitches is measured from each pitcher. Scouters believe that Rodriguez pitches a speedier fastball. Do the data support the claim at a=0.05? Pitcher Wesley Rodriguez X 86 91 S 3 7

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Answer #2 handwritten
Instructions. Read the problems carefully. For hypothesis testing, follow the 5-step procedure. For correlation
and regression, show your complete solutions and box your final answers. Write your answers on a clean sheet
of Paper. Scan or take a photo of your work and submit it in PDF format.
1.
2.
A random survey of 75 death row inmates revealed that the mean time on death
row is 17.4 years with a standard deviation of 6.3 years. Conduct a hypothesis test to
determine if the population mean time on death row could likely be 15 years. (Use
a=0.01)
The mean speeds of fastball pitches from two baseball pitchers will be compared. A
sample of 14 fastball pitches is measured from each pitcher. Scouters believe that Rodriguez
pitches a speedier fastball. Do the data support the claim at a=0.05?
A.
Pitcher
Wesley
Rodriguez
B.
x
X
3. A random sample of five professional athletes produced the following data: x is the player's
number of endorsements, and y is the amount of money made (in millions of dollars).
0
3
2
1
5
86
91
y
S
2
8
7
3
13
3
7
Compute the Pearson r and identify if it has (1) strong or weak relationship and
(2) a positive or negative relationship.
Identify the slope (b) and y' intercept (a), and then construct the equation of the
regression line (y'=a + bx).
Transcribed Image Text:Instructions. Read the problems carefully. For hypothesis testing, follow the 5-step procedure. For correlation and regression, show your complete solutions and box your final answers. Write your answers on a clean sheet of Paper. Scan or take a photo of your work and submit it in PDF format. 1. 2. A random survey of 75 death row inmates revealed that the mean time on death row is 17.4 years with a standard deviation of 6.3 years. Conduct a hypothesis test to determine if the population mean time on death row could likely be 15 years. (Use a=0.01) The mean speeds of fastball pitches from two baseball pitchers will be compared. A sample of 14 fastball pitches is measured from each pitcher. Scouters believe that Rodriguez pitches a speedier fastball. Do the data support the claim at a=0.05? A. Pitcher Wesley Rodriguez B. x X 3. A random sample of five professional athletes produced the following data: x is the player's number of endorsements, and y is the amount of money made (in millions of dollars). 0 3 2 1 5 86 91 y S 2 8 7 3 13 3 7 Compute the Pearson r and identify if it has (1) strong or weak relationship and (2) a positive or negative relationship. Identify the slope (b) and y' intercept (a), and then construct the equation of the regression line (y'=a + bx).
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