Computing critical value and null hypothesis

Assignment Help Basic Statistics

Reference no: EM1318393

Q1) Sociologist wishes to find out if life expectancy of people in Africa is less than life expectancy of people in Asia. Data obtained is listed in the table below

	Africa (1)	Asia (2)
	55.3	65.2
σ	8.1	9.3
n	53	42

1) What is the null hypothesis? Use α =0.05

a) H0 : µ1 ≥ µ2

b) H0 : µ1 = µ2

c) H0 : µ1 ≤ µ2

d) H0 : µ1 ≠ µ2

2) Compute critical value. Use α =0.05

a) -2.33

b) -2.58

c) -1.96

d) -1.645

Q3) A marketing firm asked random set of married and single men as to how much they were eager to spend for vacation. At α = .05, is a difference in two amounts?

	Married men	Single men
Sample size	50	70
Mean spending	260	185
Sample variance	4500	9000

a) Yes because the test value 5.07 is outside interval (-1.96, 1.96)

b) No, as the test value 2.00 is outside interval (-1.96, 1.96)

c) No, as the test value 0.34 is inside interval (-1.96, 1.96)

d)Yes, as the test value 2.00 is inside interval (-1.96, 1.96)

Reference no: EM1318393

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