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3 years ago

Carol surveyed two samples of 200 people each about their favorite musical instrument and recorded them in the table below.

Mathematics

1 answer:

Tcecarenko [31]3 years ago

5 0

Answer:

$\%Guitar = 33 \%$

Step-by-step explanation:

Given

The two-way table

Required

Percentage of men and women whose favorite is Guitar

From the table, we have:

$Total = 200$

Those who prefer Guitar

$Men=29$

$Women = 37$

So:

$Guitar = 29 +37 = 66$

So, the percentage of men and women is:

$\%Guitar = \frac{Guitar}{Total} * 100\%$

$\%Guitar = \frac{66}{200} * 100\%$

$\%Guitar = \frac{6600}{200} \%$

$\%Guitar = 33 \%$

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4 years ago

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3 years ago

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Musya8 [376]

Answer:

A 95% confidence interval for the true mean minimum temperature that will damage an iPod is between 2.55°F and 7.45°F

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Step-by-step explanation:

Step 1

Null hypothesis: The average damaging temperature of nine iPods is 5°F

Alternate hypothesis: The average damaging temperature of nine iPods differs from 5°F

Step 2

Mean=5°F, Sd=3, df=n-1=9-1=8

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