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AleksandrR [38]

2 years ago

5

Anne has already knit 86 centimeters of scarf, and can knit 22 centimeters each night. After 21 nights of knitting, how many cen

timeters of scarf will Anne have knit in total? Write and solve an equation to find the answer.

1 answer:

vagabundo [1.1K]2 years ago

6 0

Answer: 548

Step-by-step explanation:

She kit 426 in 21 nights = 22x21

And then you add how much she already finish

426+86=548

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Diano4ka-milaya [45]

Answer:

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Step-by-step explanation:

a.What is the standard error?

The standard error is

$s = \frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample. So

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b.What is the margin of error at 90% confidence?

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.9}{2} = 0.05$

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Now, find the margin of error M as such

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c. Using my sample of 30, what would be the 90% confidence interval for the population mean?

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247 - 14.11 = 232.89 pounds

Upper bound

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