Q6 An instructional video on pitching claims that after unde

Q6 An instructional video on pitching claims that after undergoing the training on the? video, players will be able to throw strikes on at least 62?% of their pitches. To test this? claim, 20 Little Leaguers throw 50 pitches each before and after undergoing the training. The table records the number of strikes?(out of 50?) that each player threw. Use a significance level of 0.05.

Again and Again PLEASE DON\'t ANSWER IF YOU ARE NOT SURE 100%

Solution

answer of part (a) D

here we test  for One sample Mean

t= ( x^- 0)/s/n

here after calculation x^- =33.4, 0=31, s=2.4957

the test statistic t=4.300

p=0.000193

Yes, there is evidence that training is effective in improving the player ability to throw strikes

Yes, there is strong evidence that after training players can throw strikes more than 62% of the time

answer of part b) is B

Paired t -test statistic for H0: 1 = 2 (paired sample,):
t =d/(s_d/n) with df (n 1).

and statistic t=2.654

p-value=0.0078