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3 years ago

-4x-10≤2 A)x≤-3 B)x≥-3 C)x≤2 D)x≥2

Mathematics

1 answer:

AnnZ [28]3 years ago

7 0

X>2 because if u divide -4 and -10 you get 2.5 and that is greater than 2

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Consider the following hypothesis test: H 0: 20 H a: < 20 A sample of 60 provided a sample mean of 19.5. The population stand

viva [34]

Answer:

We reject the null hypothesis and accept the alternate hypothesis. Thus, it be concluded that the population mean is less than 20.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 60

Sample mean, $\bar{x}$ = 19.5

Sample size, n = 60

Alpha, α = 0.05

Population standard deviation, σ = 1.8

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 20\\H_A: \mu < 20$

We use One-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{19.5 - 20}{\frac{1.8}{\sqrt{60}} } = -2.151$

Now, $z_{critical} \text{ at 0.05 level of significance } = -1.64$

Since,

$z_{stat} < z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis. Thus, it be concluded that the population mean is less than 20.

5 0

4 years ago

BRAINLY

Ksivusya [100]

The answer would be m>-4

8 0

3 years ago

I need help me explain the answer

Slav-nsk [51]

108 is the answer because a triangle has a total of 180 degrees and you only have 72 so far basically add 36+36 or 36*2 then since you have 72 subtract it from 180 and thats your answer

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4 years ago

Which is bigger 80,000 lbs or 9 t? Or are they the same?

Serga [27]

80,000 pounds is bigger than 9 tons. If you convert 80,000 pounds to tons, it will be equal to 40 tons.

<em>Hope it helps</em>

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3 years ago

Read 2 more answers

Solution:

ivann1987 [24]

What are the choices ?

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4 years ago