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r-ruslan [8.4K]

4 years ago

8

The girls decide to only spend $40 between them.on average,how much money can each girl spend?

1 answer:

Neko [114]4 years ago

3 0

20 I think idk I'm doing this for points

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the ratio of the number of hair bands to the number of ribbons in different gift boxes is 7: 4 which table best shows the number

Roman55 [17]

<span>so you have 7 hair bands to 4 number of ribbons</span>

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4 years ago

Read 2 more answers

What polynomial when divided by 9y to the 3rd power yields 8y to the 2nd power-2y+4 as a quotient?

ladessa [460]

9y(8y² - 2y + 4)
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3 years ago

en una reunion hay 2 arequipeños,2 trujillanos, 3 piuranos y 4 limeños ¿de cuantas maneras diferentes pueden colocarse en un fil

Svetlanka [38]

Answer:

In a meeting there are 2 Arequipeños, 2 Trujillanos, 3 Piuranos and 4 Limans. In how many different ways can they be placed in a row so that those of the same city are together?

Step-by-step explanation:

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4 years ago

A survey of 25 randomly selected customers found the ages shown (in years). The mean is 32.64 years and the standard deviation i

____ [38]

Answer:

See below for answers and explanations

Step-by-step explanation:

<u>Part A</u>

Assuming that conditions have been met for the interval, we use the formula $\displaystyle CI=\bar{x}\pm t\frac{s}{\sqrt{n}}$ where $\bar{x}$ represents the sample mean, $t$ represents the critical value, $s$ represents the sample standard deviation, and $n$ is the sample size.

The critical value of $t$ for an 80% confidence level with degrees of freedom $df=n-1=25-1=24$ is equivalent to $t=1.317836$

Thus, we can compute the confidence interval:

$\displaystyle CI=\bar{x}\pm t\frac{s}{\sqrt{n}}\\\\CI=32.64\pm1.317836\biggr(\frac{9.39}{\sqrt{25}}\biggr)\\\\CI\approx\{30.17,35.11\}$

Therefore, we are 80% confident that the true mean age of all customers is between 30.17 and 35.11 years.

<u>Part B</u>

The margin of error is $\displaystyle t\frac{s}{\sqrt{n}}=1.317836\biggr(\frac{9.39}{\sqrt{25}}\biggr)\approx2.47$

6 0

3 years ago

Anyone know the answers?? Please help?

Murljashka [212]

24. C
25. D

I honestly don't know.

4 0

3 years ago