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hodyreva [135]
3 years ago
8

A survey was done that asked people to indicate whether they preferred pool swimming or ocean swimming. The results of the surve

y are shown in the two-way table.
Chantal is making a relative frequency table from this data.

What operation should Chantal perform to determine the relative frequency of a person over 30 years old who prefers ocean swimming?

Mathematics
1 answer:
Leviafan [203]3 years ago
5 0

I am 100% sure it is A. I did the test and it showed it was A.

Please leave a thanks.

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mr_godi [17]
<span>radius=1/2 diameter
 are=radius^2*3.14
Hope I helped, and good luck!</span>
7 0
3 years ago
Read 2 more answers
Suppose the round-trip airfare between Philadelphia and Los Angeles a month before the departure date follows the normal probabi
QveST [7]

Answer:

52.74% probability that a randomly selected airfare between these two cities will be between $325 and $425

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

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

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

\mu = 387.20, \sigma = 68.50

What is the probability that a randomly selected airfare between these two cities will be between $325 and $425?

This is the pvalue of Z when X = 425 subtracted by the pvalue of Z when X = 325. So

X = 425

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

Z = \frac{425 - 387.20}{68.50}

Z = 0.55

Z = 0.55 has a pvalue of 0.7088

X = 325

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

Z = \frac{325 - 387.20}{68.50}

Z = -0.91

Z = -0.91 has a pvalue of 0.1814

0.7088 - 0.1814 = 0.5274

52.74% probability that a randomly selected airfare between these two cities will be between $325 and $425

7 0
3 years ago
Can someone please answer this question?
Verdich [7]

100 because sum means addition so 1+0+0 is one, and one X one hundred is 100

Hope this helps :D

5 0
3 years ago
A 24 hour digital watch shows 19:29:00 on its face. The first two digitals adicate
liraira [26]

Answer:

271

Step-by-step explanation:

4 hours and 31 minutes = 240 + 31 = 271 minutes

8 0
3 years ago
Can someone give me the answer
larisa [96]

change it to 269 then add 15

5 0
2 years ago
Read 2 more answers
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