2 years ago

What is 18.75 rounded two decimals places

Mathematics

1 answer:

Serggg [28]2 years ago

7 0

The answer would be 18.8

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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)

3 0

3 years ago

I really need this ASAP! what is 14 2/7 as a fraction

nlexa [21]

Multiply 14 by the denominator of the fraction.

14 • 7 = 98

Then add it to the numerator.

98 + 2 = 100

Your answer is 100/7

8 0

3 years ago

Im<br> sorry if u are having trouble seeing

algol [13]

Answer:

1) 1 to 3

2) 1/3 B*H

Step-by-step explanation:

3 0

2 years ago

Can someone help me?It's urgent and thank you!

Dafna1 [17]

Answer number 3

Step-by-step explanation:

8 0

2 years ago

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The table below represents ordered pairs that satisfy the functions f(x) and g(x). A 3-column table has 4 rows. Column 1 is labe

allsm [11]

Answer:

B and D are the correct answers.

Step-by-step explanation:

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2 years ago

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What is 18.75 rounded two decimals places​

What is 18.75 rounded two decimals places