2 years ago

Given that the minimum value is 4, find the value of k

Mathematics

1 answer:

finlep [7]2 years ago

5 0

Hope this would help you

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There are 60 dogs at a doggie daycare on Friday. If 1/3 of the dogs are large dogs, 1/6 of the dogs are medium-sized dogs,and th

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I need to divide a recipe in half that calls for 1/2 of a cup of sugar. How much sugar do I need?

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The price of an item yesterday was 130. Today, the price fell to 91 . Find the percentage decrease.

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The number of square feet per house is normally distributed with a population standard deviation of 154 square feet and an unkno

11111nata11111 [884]

Answer: (1500.66,1599.34)

Step-by-step explanation:

Confidence interval for population mean:

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

,where $\overline{x}$ = Sample mean , n= Sample size, z* = critical two tailed z-value , $\sigma$ = population standard deviation.

As per given , we have

n= 16

$\sigma = 154$ square feet

$\overline{x}= 1550$ square feet

$\alpha= 1-0.80 = 0.20$

Critical z-value = $z_{\alpha/2}=z_{0.2/2}=z_{0.1}=1.2815$

Confidence interval for population mean:

$1550\pm (1.2815)\dfrac{154}{\sqrt{16}}\\\\ = 1550\pm (1.2815)\dfrac{154}{4}\\\\= 1550\pm 49.33775\\\\ =(1550-49.33775,\ 1550+49.33775)\\\\\approx (1500.66,\ 1599.34)$

Required confidence interval: (1500.66,1599.34)

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