HW11_skeleton

10.2

• 1. Statistically significant
• 2. True
• 3. False
• 4. 2.333
• 5. 1.28

7.)

a) 2.31, reject null hypothesis 
  
b) 0.0104

11.)

a) -1.49, do not reject null hypothesis 
  
b) 0.1362

 

17. Test statistic = 0.65, do not reject null hypothesis

 

10.3

1.)

a) 2.602
  
b) -1.729
  
c) plus or minus 2.179

12.)

a) Ho: p = 63.7
   
   H1: p > 63.7
  
b) The p-value of .35 means that if the null hypothesis is true, this type of result would be expected in 35 out of 100 samples. 
  
c) Fail to reject null hypothesis because the p-value is larger than the level of significance 

13.)

a) Ho: mue = 22

   H1: mue > 22
  
b) The random sample is 200. You can assume that the sampled values are independent 
  
c) 2.176. Reject the null hypothesis 

d) There is evidence to say that students who complete the curriculum are ready for college-level math classes. 

14.)

a) Ho: mue = 501

   H1: mue < 501

b) Random sample of 100 students. Can assume that the values are independent 
  
c) -1.38. Fail to reject null hypothesis 

d) There is no evidence to say that students who learn enlish while learning another language score worse on the critical reading part of the SAT

15. -4.553, reject null hypothesis