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Ad libitum [116K]

3 years ago

11

and to my sneakers but a total of 305.43 dollars on the groceries.She spent 213.20 in first month.How much did she spend in the

second month

1 answer:

stiv31 [10]3 years ago

5 0

Well 305.43 - 213.20 = 92.23 so im guessing 92.23 was spent in the second month.

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What should a size of a sample be in order to have a margin of error of 4% for a 90% confidence level from a population with a s

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In this problem:

We need a sample size of n or higher, when $M = 0.04, \sigma = 35$ . So

$M = z*\frac{\sigma}{\sqrt{n}}$

$0.04 = 1.645*\frac{35}{\sqrt{n}}$

$0.04\sqrt{n} = 1.645*35$

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3 years ago