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Vikentia [17]
3 years ago
5

Brittany surveyed the students in three different Chemistry classes regarding the average number of hours of sleep they get each

night. She calculated the mean and standard deviation, SD, of the data and recorded the results in the table below.
Class A
Mean = 7.35
SD = 2.92

Class B
Mean = 6.87
SD = 3.65

Class C
Mean = 8.14
SD = 3.10
Use the information provided to complete the following statement.

Class ( A, B, C) shows the most consistency in the number of hours slept per night because the(standard deviation, mean) is the (highest, lowest).
Mathematics
2 answers:
Otrada [13]3 years ago
7 0

Answer:

Class A shows the most consistency in the number of hours slept per night because the standard deviation is the lowest.

Step-by-step explanation:

The standard deviation of a set measures how close the measures of this set are, that is, how consistent they are.

The lesser the standard deviation is, the higher the consistency is.

In this problem, we have that:

Class A has the lowest standard deviation.

So:

Class A shows the most consistency in the number of hours slept per night because the standard deviation is the lowest.

aalyn [17]3 years ago
6 0
Class B has the most consistant sleep because there is less of a difference between 6.87 and 3.65 than the other classes.
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Ed invests $912.08 in stocks and $487.78 in bonds. Then, Ed moves $378.29 from stocks to bonds. How much money does Ed now have
allochka39001 [22]

Answer:

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Step-by-step explanation:

All you need to do is 487.78+378.29 right?

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4 0
3 years ago
help solve this problem Based on a​ poll, 62​% of Internet users are more careful about personal information when using a public
erma4kov [3.2K]

Answer

The probability that among four randomly selected Internet​ users, at least one is more careful about personal information when using a public​ Wi-Fi hotspot is 0.979.

Step-by-step explanation:

Since  62​% of Internet users are more careful about personal information when using a public​ Wi-Fi hotspot.

Therefore, the Probability of 62​% of Internet users are more careful about personal information when using a public​ Wi-Fi hotspot is, p=0.62.

We have to find the probability that at least one user is more careful about personal information when using wi-fi hotspot.

Probability of internet users are not more careful about personal information when using a public wi-fi hotspot, i.e q=1-p

q=1-0.62=0.38

Use Binomial Distribution, i.e,  P\left ( X \right )=^nC_xp^xq^\left ( n-x \right )

p=0.62, q=0.38, n=4.

Required Probability  P\left ( X\geq 1 \right )=P\left ( X=1 \right )+P\left ( X=2 \right )+P\left ( X=3 \right )+P\left ( X=4 \right )

or

P\left ( X\geq 1 \right )=1-P\left ( X=0 \right )

                                          =1-^4C_0p^0q^\left ( 4-0 \right )

                                          =1-4\cdot1\cdot q^\left ( 4-0 \right )

                                         =1-4\cdot \left ( 0.38 \right )^4

                                         =1-0.02085136=0.97914864

Therefore, the probability that at least one users more careful about personal information when using wi-fi hotspot, i.e 0.979(approx).

RESULT:

<u>The result should not be impacted by this because volunteers are likely to have the most relevant responds.</u>



6 0
3 years ago
How do i Simplify 252 ÷ 3-3(4)(1)?
vivado [14]

9514 1404 393

Answer:

  72

Step-by-step explanation:

Enter the expression into your calculator.

__

If you're doing this by hand, follow the Order of Operations. The expression is the difference of a quotient and a product. The quotient is on the left, so it is figured first.

  252÷3 = 84

The product is figured next.

  3(4)(1) = 12(1) = 12

Then the difference is figured:

  84 -12 = 72

The simplified result is 72.

7 0
3 years ago
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