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s344n2d4d5 [400]
3 years ago
6

I need help with this plz help me fast!!

Mathematics
2 answers:
aliina [53]3 years ago
5 0

The answer is a....I think.

lesya692 [45]3 years ago
4 0
The answer is A I believe
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Using the simple random sample of weights of women from a data​ set, we obtain these sample​ statistics: nequals45 and x overbar
Tomtit [17]

Answer: (141.1, 156.48)

Step-by-step explanation:

Given sample statistics : n=45

\overline{x}=148.79\text{ lb}

\sigma=31.37\text{ lb}

a) We know that the best point estimate of the population mean is the sample mean.

Therefore, the best point estimate of the mean weight of all women = \mu=148.79\text{ lb}

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

\mu\ \pm E, where E is the margin of error.

Formula for Margin of error :-

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

Given : Significance level : \alpha=1-0.90=0.1

Critical value : z_{\alpha/2}=z_{0.05}=\pm1.645

Margin of error : E=1.645\times\dfrac{31.37}{\sqrt{45}}\approx 7.69

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

148.79\ \pm\ 7.69 =(148.79-7.69\ ,\ 148.79+7.69)=(141.1,\ 156.48)

Hence, the 90​% confidence interval estimate of the mean weight of all women= (141.1, 156.48)

3 0
3 years ago
Violet earned a score of 662 on Exam A that had a mean of 550 and a standard
jeyben [28]

Answer:

Step-by-step explanation:

662

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Write an equation to represent m varies inversely as the square of q ?​
kolezko [41]

Answer:

m = \frac{k}{q^2}

Step-by-step explanation:

Given m varies inversely as q² then the equation relating them is

m = \frac{k}{q^2} ← k is the constant of variation

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3 years ago
You saved $300 to spend over the summer part c
juin [17]

Answer:

huh?

Step-by-step explanation:

3 0
3 years ago
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What is z equal too ? please help me !!! thanks 10 points asap !!!
wariber [46]
Z would mean 0 considering they would both be the last
5 0
3 years ago
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