Question

z-values, whereas means located to the right of: 6. Means located to the left of u: have havez-values. a. positive; negative b. negative; positive 7. Which of the following is most likely to represent a statement of the null hypothesis? a. Ho:>0. b. H. : <0. c. He: u=0. d. H.: p0. 8. Other things being equal, an alpha level of .05 should lead to a rejection of the null hypothesis a. more often than when alpha is set at .01 b. more often than when alpha is set a .10 c. less often than when alpha is set at .01 d. none of the above 19. Rejecting H, when in fact it should have been retained causes the a. standard error b. sampling error с. Type I error d. Type II error

Answer 1

According to Chegg's guideline I can only answer to one question.

  
solution 6) The 2-values are available in standased Normal table. The geoph of a standard Normal is given below. In these type of testing the null hypothesis is H- some constant. Here since it is standardized we have - M_o. . In Mancy testing problem we have to find a 1902 Z value corresponding to certain value of a such that P[12]<Zayn] =1-2. Now consider the graph. The graph is nu divided into 2 equal pouts at -o. so we have clearly the mean located to the left of u have a negative value because all nalues in (-2,0) is negative and mean located to the right of u hoi positive a-values in since all the values in (o,) is positive.

- Therefore the required answer is b. negative ; positive