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3 years ago

2. Mr. Holms used of a carton of orange

Mathematics

1 answer:

Zepler [3.9K]3 years ago

3 0

1/2 fraction of whole carton was used for each serving

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We wish to give a 90% confidence interval for the mean value of a normally distributed random variable. We obtain a simple rando

coldgirl [10]

Answer: $(9.27025,\ 11.12975)$

Step-by-step explanation:

Given : Sample size : n= 9

Degree of freedom = df =n-1 =8

Sample mean : $\overline{x}=10.2$

sample standard deviation : $s= 1.5$

Significance level ; $\alpha= 1-0.90=0.10$

Since population standard deviation is not given , so we use t- test.

Using t-distribution table , we have

Critical value = $t_{\alpha/2, df}=t_{0.05 , 8}=1.8595$

Confidence interval for the population mean :

$\overline{x}\pm t_{\alpha/2, df}\dfrac{s}{\sqrt{n}}$

90% confidence interval for the mean value will be :

$10.2\pm (1.8595)\dfrac{1.5}{\sqrt{9}}$

$10.2\pm (1.8595)\dfrac{1.5}{3}$

$10.2\pm (1.8595)(0.5)$

$10.2\pm (0.92975)$

$(10.2-0.92975,\ 10.2+0.92975)$

$(9.27025,\ 11.12975)$

Hence, the 90% confidence interval for the mean value= $(9.27025,\ 11.12975)$

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3 years ago

An office administrator earns $16 an hour, and she works 48 hours a week. What is her weekly wage?

Dvinal [7]

If she works 48 hours per week and she earns 16 dollars per hour, we can find the weekly wage by multiplying 48 by 16. This gets us a weekly wage of $768 (Choice A).

:)

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What is the area of the circle?

Gelneren [198K]

Answer:

For a circle.

Step-by-step explanation:

A=πr^2

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Help! I'll give brainliest to the first correct answer!

Mice21 [21]

Answer:A

Step-by-step explanation:

the answer is A

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4 years ago

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Help please! Not sure what this is

Lesechka [4]

B. Rotation
I’m assuming the question is not asking about placement but just the way the shape is.
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