Strikes Advertisements for an instructional video claimthat the techniques will improve the ability of Little League pitchers to throw strikes and that, after undergo-ing the training, players will be able to throw strikes on at least 60% of their pitches. To test this claim, wehave 20 Little Leaguers throw 50 pitches each, and werecord the number of strikes. After the players participatein the training program, we repeat the test. The tableshows the number of strikes each player threw beforeand after the training. a) Is there evidence that after training players can throwstrikes more than 60% of the time? b) Is there evidence that the training is effective in im-proving a player’s ability to throw strikes? Number of Strikes(out of 50) Number of Strikes(out of 50)Before After Before After28 35 33 3329 36 33 3530 32 34 3232 28 34 3032 30 34 3332 31 35 3432 32 36 3732 34 36 3332 35 37 3533 36 37 32
Strikes Advertisements for an instructional video claimthat the techniques will improve the ability of Little League pitchers to throw strikes and that, after undergo-ing the training, players will be able to throw strikes on at least 60% of their pitches. To test this claim, wehave 20 Little Leaguers throw 50 pitches each, and werecord the number of strikes. After the players participatein the training program, we repeat the test. The tableshows the number of strikes each player threw beforeand after the training. a) Is there evidence that after training players can throwstrikes more than 60% of the time? b) Is there evidence that the training is effective in im-proving a player’s ability to throw strikes? Number of Strikes(out of 50) Number of Strikes(out of 50)Before After Before After28 35 33 3329 36 33 3530 32 34 3232 28 34 3032 30 34 3332 31 35 3432 32 36 3732 34 36 3332 35 37 3533 36 37 32
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 9E
Related questions
Topic Video
Question
100%
Strikes Advertisements for an instructional video claim
that the techniques will improve the ability of Little
that the techniques will improve the ability of Little
League pitchers to throw strikes and that, after undergo-
ing the training, players will be able to throw strikes
ing the training, players will be able to throw strikes
on at least 60% of their pitches. To test this claim, we
have 20 Little Leaguers throw 50 pitches each, and we
record the number of strikes. After the players participate
in the training program, we repeat the test. The table
shows the number of strikes each player threw before
and after the training.
have 20 Little Leaguers throw 50 pitches each, and we
record the number of strikes. After the players participate
in the training program, we repeat the test. The table
shows the number of strikes each player threw before
and after the training.
a) Is there evidence that after training players can throw
strikes more than 60% of the time?
strikes more than 60% of the time?
b) Is there evidence that the training is effective in im-
proving a player’s ability to throw strikes?
proving a player’s ability to throw strikes?
Number of Strikes
(out of 50)
(out of 50)
Number of Strikes
(out of 50)
Before After Before After
28 35 33 33
29 36 33 35
30 32 34 32
32 28 34 30
32 30 34 33
32 31 35 34
32 32 36 37
32 34 36 33
32 35 37 35
33 36 37 32
(out of 50)
Before After Before After
28 35 33 33
29 36 33 35
30 32 34 32
32 28 34 30
32 30 34 33
32 31 35 34
32 32 36 37
32 34 36 33
32 35 37 35
33 36 37 32
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