Question

a. 26 Given a test statistic of 2.09 paired with a critical z-score of 233 on a one tailed test, then the c fail to reject at α-1% b)fail to reject Hua-5% reject and accept H. at a-5% e) noot ofthese ,reject ILndecepti,re.rs 27. At a 95% a) 1A interval, how often would we expect 95% c)1% to 28. We are allowed to use the normal distribution if d)90% e)10% ơīs known b) n-500 c α b) df c) the-test statistic" (LS) d) the critical z-score (2) increase the confid) ncrease the sample size ) incrase the risrn or more c) eitber (o) or (b) d) both (e) and(b) ) noe of these 29. a p-value for an hypothesistest, it's compared to what vabue to make osr decision 30, action will cause the confidence interval to widen? e)themical-score(.) d) increase a C) all of these except choice (a) 31. If 1 joey is chosep at random, what's the probability that it weighs between 450 and 470 mg 32. If 1 joey is chosen at random, what's the probability that it weishs exacty $00 mg? 33. If 10 joeys are chosen at random, how likely is it that they average between 450 and 470 m? 121 c) 2266 d) .1056 e) mone of these b) .121 2266 d) 106 one of these b) less than 1% c) 5% d) 0% e) none of these a) o a) o a)1% 34. What is the critical value (ze or te) to be used in this test? d)42.12 e) none ofthese ±1.645 c) ±2.13 a) 1.96 d)0456 e)none ofthese 35. What is the p-value result for this test? b) .0250 c) .0228 a).0050 Does Christine reject or fail to reject (FTR) He and for what reason? reject because p-value s a c)FTR because pvaoe a 36. FTR because reject because its! <闷 eject because P-value > a nQr 37. What is the new critical value (ze or t) to be used in this test? a) t1.96 b) 1.645 c) 2.13 d) 2.12 e) none of these

Answer 1

Solution(26)
Given in the question test stat= 2.09 so p-value = 0.0143
Zcrit = 2.33 and alpha = 0.01
Also This is one tailed test so here we can see that p-value is greater than alpha value so we are failed to reject H0.
So its answer is A.

Solution(27)
If confidence level is 95%
than we are 5% often expect mean to fail outside the interval estimate.
So its answer is B. i.e. 5%

Solution(28)
We will use normal distribution if population standard deviation is known so its answer is A.

Solution(29)
p-value always compared to alpha value. so its answer is A. i.e. alpha

Solution(30)

If confidence level increases than confidence interval width will increase so its answer is A.