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Dmitriy789 [7]
3 years ago
12

Select the correct answer.

Mathematics
2 answers:
Nitella [24]3 years ago
7 0

Answer:

D. The mean number of hours will increase.

Step-by-step explanation:

bagirrra123 [75]3 years ago
4 0

Answer: it is B

Step-by-step explanation:

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Explain how to perform a​ two-sample z-test for the difference between two population means using independent samples with known
iren2701 [21]

Answer:

The steps 1-7 have been explained

Step-by-step explanation:

The steps are;

1) We will verify that the population standard deviations are known and that the population is normally distributed which means the sample size must be a minimum of 30.

2) We will state the null and alternative hypothesis

3) We will determine the critical values from the relevant tables

4) From the critical values gotten, we will determine it's corresponding region where it can be rejected.

5)We will calculate the value of the test statistic from the formula;

z = [(x1' - x2') - (μ1 - μ2)]/√[((σ1)²/n1) + ((σ2)²/n2)]

6) If the value of the test statistic gotten from step 5 above falls in the region of rejection noted in step 4,then we will reject the null hypothesis

7) After rejection of the null hypothesis, we will now give a decision/conclusion on the claim.

5 0
3 years ago
Simplify thefollowing algebraic expression 6(2y +8) -2 (3y
telo118 [61]
6(y+8) is the answer but you didn’t finish the equation so
5 0
3 years ago
Which is more, 13 feet or 4 yards?
NikAS [45]

Answer:

it is 13 feet

Step-by-step explanation:

because it is 4.33333 yards

3 0
3 years ago
“Half of a number (n) is at least 22."<br> translate and solve
viktelen [127]

Answer:

n >_44

Step-by-step explanation:

1/2n>_22

(times 2 on both sides)

n >_44

*** >_ is greater than or equal to sign

8 0
3 years ago
Find the volume of the given solid. under the surface z = 5xy and above the triangle with vertices (1, 1), (4, 1), and (1, 2)
Black_prince [1.1K]
So right now you see that you have x and y intercept right? Then plug those intercepts in equation that you have and solve for z. Which means z=5(1)(1) will be 5, 5(4)(1) will be 20, and 5(1)(2) will be 10. So, overall you have 5, 20, 10.
8 0
3 years ago
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