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IceJOKER [234]
2 years ago
8

A customer service survey was conducted of 500 customers: 250 men and 250 women. The data on one of the questions show that 175

men and 160 women rate the customer service as excellent. What percentage of men gave an excellent rating? What percentage of women gave an excellent rating? What was the total percentage of customers giving an excellent rating?
a)70%, 64%, 67%
b)70%, 64%, 70%
c)70%, 66%, 67%
d) 75%, 64%, 67%
Mathematics
1 answer:
Evgen [1.6K]2 years ago
5 0

Answer:

a) 70%, 64%, 67%

Step-by-step explanation:

Total customers surveyed = 500

Number of men = 250

Number of women = 250

Number of men who rated the customer service excellent = 175

Number of women who rated the customer service excellent = 160

Total number of customers who rated the customer service excellent = 175+160 =335

Percentage of men who rated the customer service excellent

⇒ \frac{\textrm{Number of men who rated excelent}}{\textrm{Total number of men}}\times 100

⇒ \frac{175}{250}\times 100

⇒ 70%

Percentage of women who rated the customer service excellent

⇒ \frac{\textrm{Number of women who rated excelent}}{\textrm{Total number of men}}\times 100

⇒ \frac{160}{250}\times 100

⇒ 64%

Percentage of customers who rated the customer service excellent

⇒ \frac{\textrm{Number of customers who rated excelent}}{\textrm{Total number of men}}\times 100

⇒ \frac{335}{500}\times 100

⇒ 67%

So, the correct order is : 70%, 64%, 67% (Answer)

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After 8 years a loan grows to $75 210. If the interest was compounded annually at a rate of 8.5%, find the size of the initial l
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Given:
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term = 8 years
rate = 8.5%
Initial loan = ?

In this case, we need to find the present value of the loan. Compounded means that even the interest has an interest.

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Let

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The distance's equation in function notation is equal to

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Using a graph tool

see the attached figure

The domain of the function is the interval----------> [0,∞)

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The range of the function is the interval------->  [0,∞)

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<u>Statements</u>

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Answer:

The probability that Albert's sample of 64 will have a mean between 13.5 and 16.5 minutes is 0.9973.

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

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If we apply the Z score formula to our probability we got this:

P(13.5

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And we can find this probability on this way:

P(-3

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.  

P(-3

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