3 years ago

(3x/5-7)+7 is equal to what

Mathematics

1 answer:

Elena L [17]3 years ago

5 0

(3x/5-7)+7

= (3x/-2) + 7

= -3x/2 + 7

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a) Option A)

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b) Point estimate of difference = -78

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = $1,503

Sample mean, $\bar{x}$ = $1,425

Sample size, n = 25

Sample standard deviation, s = $160

We have to carry a hypothesis test that the mean annual premium in Pennsylvania is lower than the national mean annual premium.

a) First, we design the null and the alternate hypothesis

$H_{0}: \mu \geq 1503\text{ dollars}\\H_A: \mu < 1503\text{ dollars}$

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