Please help on the ones that aren’t answered! 19. An equiprobable approach goodn

Question

Please help on the ones that aren’t answered! 19. An equiprobable approach goodness of fit test with 8 cells for data that is normally distributed with a theoretical given mean of 10 and a std of 2, would have how many degrees of freedom for the critical value? 11. Receiving a false positive on an engineering job interview drug test means the testing facility has? b. 6 d. a. Committed a type 1 error b. Committed a type 2 error c. Made the correct decision d. None of the above 20. Assuming normality and independence,if nl or n2 or both are

Explanation / Answer

Solution:

11) A type I error is the incorrect rejection of a true null hypothesis (a "false positive").

Answer: (a) Committed a type 1 error

13) a type II error is incorrectly retaining a false null hypothesis (a "false negative").

Answer: (b) Committed a type 2 error

14)Degrees of freedom in paired t test is (n-1). Here n = 20

Answer: (b) 19

19)There are (n-3) degrees of freedom for normal distribution in testing goodness of fit.

Here n = 8

Answer: (a) 5

20)For <30 sample size and after testing F test when Null hypothesis of F test can not rejected, then we use independent t- test.

Answer: (a) Independent t test

21)F test is used before testing mean for the equality of variances. But there are no information about mean and sample size.

Answer: (d) Can not determine from the above information

Done

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