Homework: Assignment #3 Score: 0.38 of 1 pt 4of s(S complete) 7.4.9-T A medical

Question

Homework: Assignment #3 Score: 0.38 of 1 pt 4of s(S complete) 7.4.9-T A medical researcher says that less than 20% of adults i, a certain country are smokers. In a random sarple of 250 adults from smokers. At -0 05, is there enough evidence to support the researchers claim? Complete parts (a) though, (e) below. a)Identify the claim and state Ho and H What is the claim Less than 26% of adults in the oortry are smokers. Less than 20% of all adults are smokers. OB C. Exactly 19.2% of all adults are smokers. O D Exactly 19.2% of adults in the country are smokers identify Ho and H HoP 0.26 Type integers or decimals) (b) Find the crrical valuels) and idensty the sejection region(s) The criticall valuels) lis/are zo Round to three decimal places as needed. Use a coma to separate answers as needed)

Explanation / Answer

b) Z0 = -Z0.05 = 1.65

Rejection region: if Zstat < -1.65                                                                                                                                                                                                                                                                        

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