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2 years ago

15

The hat you want to buy at the store just went on sale. The original price was $12, and the sale price is $5. What percent is th

e original price marked down? *

1 answer:

BARSIC [14]2 years ago

6 0

Answer:

58.33%

Explanation:

The original price is set at 12, the sale price is 5

This means the price decrease by 7$

do find the percentage, we need to do 7/12

7/12 in percentage is 58.33%

or (58+1/3)%

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What is the critical value t' for constructing a 90% confidence interval for a mean from a sample size of

Oksana_A [137]

Answer:

$t^* = 1.740$

Explanation:

Given

$n = 18$ --- sample

$CI= 90\%$ --- confidence interval

Required

Determine the critical value

Start by calculating the degrees of freedom (df)

$df = n - 1$

$df = 18 - 1$

$df = 17$

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$\alpha = \frac{1 - CI}{2}$

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Express percentage as decimal

$\alpha = \frac{1 - 0.90}{2}$

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Next, we look at the t table at

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