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Studentka2010 [4]
1 year ago
13

4. (40 Pts) The Vacation Times website rates recreational vehicle campgrounds

Mathematics
1 answer:
dusya [7]1 year ago
6 0

Using the normal distribution, it is found that:

a) The rating would have to be of at least 9.78.

b) The z-score for a rating of 5 is of -1.53.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.

The mean and the standard deviation are given by:

\mu = 7.6, \sigma = 1.7

For item a, we have to find the 90th percentile, which is <u>X when Z = 1.28</u>, hence:

Z = \frac{X - \mu}{\sigma}

1.28 = (X - 7.6)/1.7

X - 7.6 = 1.28 x 1.7

X = 9.78.

The rating would have to be of at least 9.78.

For item b, we have to find <u>Z when X = 5</u>, hence:

Z = \frac{X - \mu}{\sigma}

Z = (5 - 7.6)/1.7

Z = -1.53.


The z-score for a rating of 5 is of -1.53.

More can be learned about the normal distribution at brainly.com/question/24808124

#SPJ1

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Dmitry [639]

Answer:

Rounding to nearest hundredths gives us r=0.06.

So r is about 6%.

Step-by-step explanation:

So we are given:

A=P(1+r)^t

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A=P(1+r)^t

2300=1600(1+r)^6

Divide both sides by 1600:

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Take the 6th root of both sides:

\sqrt[6]{\frac{23}{16}}=1+r

Subtract 1 on both sides:

\sqrt[6]{\frac{23}{16}}-1=r

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Most likely we are asked to round to a certain place value.

I'm going to put my value for r into my calculator.

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Rounding to nearest hundredths gives us r=0.06.

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3 years ago
How do convert 50/6 in the lowest fraction
vovikov84 [41]

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The 25 coins in Danielle's piggy bank have a value of at least $1.44. The bank contains only nickels and dimes. What is the fewe
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Should be 3 dimes at least.
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HELP HELP HELP I WILL GIVE BRAINLIEST YALL BETTER NOT GIVE ME A NOT SMART ANSWERS IF YOU DO ILL REPORT THE QUESTION :/
monitta

Answer:

C

Step-by-step explanation:

Multiply ben (y) by 4 since dave has 4x more and add % since jeff has 5 more than Daves total

Hope this helps ^_^

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lbvjy [14]

Answer:

240 minutes or 4 hours

Step-by-step explanation:

So if it takes Erica 80 minutes to analyze the company's monthly credit card statements, she will get 30/80 of it done in 30 minutes.

If it takes Alexa 2 hours to analyze the company's monthly credit card statements, she will get 30/120 of it done in 30 minutes.

Add 15 to each of the fractions because they analyze the company's monthly credit card statements with Mack for 15 more minutes.

So you have 45/80 and 45/120.

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