Assume that the data has a normal distribution and the number of observations is

Question

Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. -0.05for a left-tailed test. SELECT ALL APPLICABLE CHOICES B) 1.96 1.96 ±1.645 1.645 E) None of these 19 Assume that a simple random sample has been selected from a normally distributed population and test the conclusion that addresses the original claim and select three correct choices. A test of sobriety SELECT ALL APPLICABLE CHOICES A) Not enough evidence to reject the Ho given claim. State the final B) Ho: 35 (claim) involves measuring the subject's motor skills.

Explanation / Answer

18)
for left tailed
P(Z< z*) = 0.05
z* = -1.645
option D) is correct

19)

Ho: mu = 35
Ha: mu not equal 35

t = (Xbar - mu)/(s/sqrt(n))
= (41 - 35)/(3.7/sqrt(20))
= 7.252112

p-value < 0.01
we reject the null

correct options F) and H)
and option E) would have correct if 35 would have instead of 53

19)

optio B) is correct

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