Homework Help is Here – Start Your Trial Now!
Math
Statistics
You "clock" 14 of Steve Dalkowski's fastballs, obtaining a mean of 111.8 mph, with a stand deviation of 3.2 mph. To a 1% level of significance, can it be asserted that the average Dall fastball (in general) is over 110 mph? [Assume that the "speeds" of all of Dalkowski's fastballs are normally distributed.] 2 Greg Maddux throws 300 pitches, of which 237 are strikes. To a 1% level of significance, i in his boast that over 75% of his pitches (in general) are strikes?

You "clock" 14 of Steve Dalkowski's fastballs, obtaining a mean of 111.8 mph, with a stand deviation of 3.2 mph. To a 1% level of significance, can it be asserted that the average Dall fastball (in general) is over 110 mph? [Assume that the "speeds" of all of Dalkowski's fastballs are normally distributed.] 2 Greg Maddux throws 300 pitches, of which 237 are strikes. To a 1% level of significance, i in his boast that over 75% of his pitches (in general) are strikes?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
See similar textbooks
icon
Related questions
Question
Answer questions 1 and 2 and show work as shown in the example
Assume that all samples are random. 1 You "clock" 14 of Steve Dalkowski's fastballs, obtaining a mean of 111.8 mph, with a standard deviation of 3.2 mph. To a 1% level of significance, can it be asserted that the average Dalkowski fastball (in general) is over 110 mph? [Assume that the "speeds" of all of Dalkowski's fastballs are normally distributed.] 2 Greg Maddux throws 300 pitches, of which 237 are strikes. To a 1% level of significance, is he right in his boast that over 75% of his pitches (in general) are strikes?
Transcribed Image Text:Assume that all samples are random. 1 You "clock" 14 of Steve Dalkowski's fastballs, obtaining a mean of 111.8 mph, with a standard deviation of 3.2 mph. To a 1% level of significance, can it be asserted that the average Dalkowski fastball (in general) is over 110 mph? [Assume that the "speeds" of all of Dalkowski's fastballs are normally distributed.] 2 Greg Maddux throws 300 pitches, of which 237 are strikes. To a 1% level of significance, is he right in his boast that over 75% of his pitches (in general) are strikes?
Assume that all samples are random. 82 fastballs thrown by Aroldis Chapman had a mean speed of 102.4 mph, with a standard deviation of .9 mph. 99 fastballs thrown by Joel Zumaya had a mean speed of 102.1 mph, with a standard deviation of .8 mph. To a 2% level of significance, can it be asserted that, in general, Chapman's fastballs are faster than Zumaya's fastballs? Chapman m = 82 x=102.4 x-y's $₁3.9 M₂=? m = 1000 410 1000 =.41 P=? p= Zumaya n=99 y=102.1 $₂=-8 M₂=? 2% 0₂= ? 2.35 1000 men and 1200 women are polled; it's found that 410 of the men and 744 of the women underestimate their mathematical ability. To a 1% level of significance, can it be asserted that, in general, a smaller percentage of men than women underestimate their mathematical ability? Men Women n=1200 = 7.62 q=? 1% (410 + 744) (1000+1200) =5245 2.52 √² + 0² - 3 83 ≈.1271 A self-proclaimed "serial killer.expert" claims that 10% of 0 (x-1)-0's -1274 Ho: M₁ M₂ HA: M₁ M₂ ACCEPT! Z P(1-P) +91-9) 1000 1200 ~VA + 1000 ≈.02139 52.48 $200 -9.82) O 1/ 2% 2.05? YES! (-)-o's .02139 Ho:p=8 HA:P<8 Z -2.33 0 YES!!!!
Transcribed Image Text:Assume that all samples are random. 82 fastballs thrown by Aroldis Chapman had a mean speed of 102.4 mph, with a standard deviation of .9 mph. 99 fastballs thrown by Joel Zumaya had a mean speed of 102.1 mph, with a standard deviation of .8 mph. To a 2% level of significance, can it be asserted that, in general, Chapman's fastballs are faster than Zumaya's fastballs? Chapman m = 82 x=102.4 x-y's $₁3.9 M₂=? m = 1000 410 1000 =.41 P=? p= Zumaya n=99 y=102.1 $₂=-8 M₂=? 2% 0₂= ? 2.35 1000 men and 1200 women are polled; it's found that 410 of the men and 744 of the women underestimate their mathematical ability. To a 1% level of significance, can it be asserted that, in general, a smaller percentage of men than women underestimate their mathematical ability? Men Women n=1200 = 7.62 q=? 1% (410 + 744) (1000+1200) =5245 2.52 √² + 0² - 3 83 ≈.1271 A self-proclaimed "serial killer.expert" claims that 10% of 0 (x-1)-0's -1274 Ho: M₁ M₂ HA: M₁ M₂ ACCEPT! Z P(1-P) +91-9) 1000 1200 ~VA + 1000 ≈.02139 52.48 $200 -9.82) O 1/ 2% 2.05? YES! (-)-o's .02139 Ho:p=8 HA:P<8 Z -2.33 0 YES!!!!
Expert Solution
steps

Step by step

Solved in 3 steps with 4 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman
SEE MORE TEXTBOOKS