3 years ago

-7=2+ w Help please

Mathematics

1 answer:

ziro4ka [17]3 years ago

5 0

Answer:

w= -9 :)

Step-by-step explanation:

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A class survey in a large class for first-year college students asked, “About how many minutes do you study on a typical weeknig

Anika [276]

Answer: (110.22, 125.78)

Step-by-step explanation:

The confidence interval for the population mean is given by :-

$\mu\ \pm z_{\alpha/2}\times\dfrac{\sigma}{\sqrt{n}}$

Given : Sample size = 463

$\mu=118\text{ minutes}$

$\sigma=65\text{ minutes}$

Significance level : $\alpha=1-0.99=0.01$

Critical value : $z_{\alpha/2}=z_{0.005}=\pm2.576$

We assume that the population is normally distributed.

Now, the 90% confidence interval for the population mean will be :-

$118\ \pm\ 2.576\times\dfrac{65}{\sqrt{463}} \\\\\approx118\pm7.78=(118-7.78\ ,\ 118+7.78)=(110.22,\ 125.78)$

Hence, 99% confidence interval for the mean study time of all first-year students = (110.22, 125.78)

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3 years ago

Choose the correct numbers from the box below to complete the subtraction sentence that follows

maw [93]

Answer:

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Step-by-step explanation:

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2 years ago

A number cube with the numbers 1 through 6 is rolled. What is the probability of the number cube showing an even number or a num

inna [77]

Answer:

Step-by-step explanation:

The correct answer is 5/6 = 83.3%

I really hope this helps!

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3 years ago

2/5 × 1/6 , but the answer as a fraction 11 points

dusya [7]

Answer:

1/15

Step-by-step explanation:

2/5*1/6

Make the denominator the same

12/30*5/30

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When I three numbers and I need to figure out how many of each number do I put in five bags what do I do

Vladimir [108]

A= first number
B= second number
C= third number

A + B + C

Then divide by 5

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3 years ago