According to official census figures, 12% of couples living together are not married. A researcher took a random sample of 400 couples and found that 11% of them are not married. Test at the 15% significance level if the current percentage of unmarried couples is less than 12%.

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step-by-step explanation:

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36

step-by-step explanation:

1. x> -5

2. x< 8

step-by-step explanation:

1. 2x> -10

divide by 2 from both sides of equation.

2x/2> -10/2

simplify, to find the answer.

-10/2=-5

x> -5 is the correct answer.

2. 3x< 24

divide by 3 from both sides of equation.

3x/3< 24/3

simplify, to find the answer.

24/3=8

x< 8 is the correct answer.

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