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3 years ago

Mrs.plunket paid $1.78 for 2/3 of a pound of potatoes what is the price per pound of potatoes

Mathematics

2 answers:

Lesechka [4]3 years ago

4 0

I think it is 2.67 but i might be wrong

zalisa [80]3 years ago

4 0

This question has a very simple answer

all you need to do is divide $1.78 by 2/3

for 1/3 pound of potatoes, it's about $0.89

the answer to your question is = $0.89

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mr_godi [17]

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2 years ago

Because of staffing decisions, managers of the Gibson-Marion Hotel are interested in the variability in the number of rooms occu

olchik [2.2K]

Answer:

a) $s^2 =30^2 =900$

b) $\frac{(19)(30)^2}{30.144} \leq \sigma^2 \leq \frac{(19)(30)^2}{10.117}$

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Step-by-step explanation:

Assuming the following question: Because of staffing decisions, managers of the Gibson-Marimont Hotel are interested in the variability in the number of rooms occupied per day during a particular season of the year. A sample of 20 days of operation shows a sample mean of 290 rooms occupied per day and a sample standard deviation of 30 rooms

Part a

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$s^2 =30^2 =900$

Part b

The confidence interval for the population variance is given by the following formula:

$\frac{(n-1)s^2}{\chi^2_{\alpha/2}} \leq \sigma^2 \leq \frac{(n-1)s^2}{\chi^2_{1-\alpha/2}}$

The degrees of freedom are given by:

$df=n-1=20-1=19$

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$\chi^2_{1- \alpha/2}=10.117$

And replacing into the formula for the interval we got:

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$567.28 \leq \sigma^2 \leq 1690.224$

Part c

Now we just take square root on both sides of the interval and we got:

$23.818 \leq \sigma \leq 41.112$

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