3 years ago

Kelly has 245 golf balls. Round this number to the nearest ten.

Mathematics

1 answer:

katen-ka-za [31]3 years ago

7 0

250 is the correct answer for this problem

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(23.01) In a randomized comparative experiment on the effect of dietary calcium on blood pressure, researchers divided 58 health

Paul [167]

Answer:

$113.7-2.154\frac{9.1}{\sqrt{29}}=110.06$

$113.7+2.154\frac{9.1}{\sqrt{29}}=117.34$

And the 96% confidence is given by (110.06; 117.34)

Step-by-step explanation:

Information given

$\bar X=113.7$ represent the sample mean

$\mu$ population mean (variable of interest)

s=9.1 represent the sample standard deviation

n=29 represent the sample size

Confidence interval

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are given by:

$df=n-1=29-1=28$

The Confidence is 0.96 or 96%, the significance is $\alpha=0.04$ and $\alpha/2 =0.02$ , and the critical value would be $t_{\alpha/2}=2.154$

Replacing the info we got:

$113.7-2.154\frac{9.1}{\sqrt{29}}=110.06$

$113.7+2.154\frac{9.1}{\sqrt{29}}=117.34$

And the 96% confidence is given by (110.06; 117.34)

5 0

3 years ago

PLEASE HELP ME THIS IS DUE ASAP!!! I will mark brainliest if right!!! Explain!

Fed [463]

Answer:

Step-by-step explanation:

6 0

2 years ago

What is the length of a diagonal of a rectangular picture whose sides are 12" x 17" round to the nearest 10th of an inch

MAXImum [283]

A^2 + b^2 = c^2
12^2 + 17^2 = 485
so c^2=485
so c=22.0 inches

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2 years ago

Given the function f(x)=-8x2+8x+9,state whether the vertex represents a maximum or minimum point for the function.

Lelechka [254]

8x2+8x+9
=16x+8x+9
=24x+9
Are that right

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3 years ago

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aliina [53]

It think the answer could quite possibly be 4

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3 years ago