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olchik [2.2K]
2 years ago
14

Answer questions (a – d) for the following three data sets. A = {3, 5, 7, 9, 11, 12, 12} B = {1, 2, 2, 5, 5, 9, 13} C = {2, 5, 8

, 9, 12, 13, 17} a. Find the mean of each data set. b. Find the standard deviation of each data set. c. Identify the data set with the largest and smallest standard deviation. Explain what the standard deviations say about the data sets
Mathematics
1 answer:
jekas [21]2 years ago
5 0

Answer:#carry on learning

mark me as brainliest

a.8.4

b.5.4

c.9.4

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The standard deviation of a population is 4.1.<br><br> What is the margin of error?
grin007 [14]

Answer:

Margin of error is 4.1

Step-by-step explanation:

The margin of error in statistics refers to a quantity which expresses the amount of random sampling error from the results of a survey conducted. A large margin of error implies less confidence in the results of the survey.

The margin of error can be approximated using the population standard deviation, if known.

Therefore, the margin of error will be reported as 4.1

4 0
3 years ago
Correct each sentence by writing the correct form of the underlined verb
dexar [7]
Grammar isn't like math,
you have to sound it out to see if it makes sense.
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8 0
3 years ago
A mechanic charged $220.28 to repair a car. The price included charges for 3 hours of labor and $126.53 for parts. How much does
jasenka [17]
Lets x is the labor charges per hour
3x + 126.53 = 220.28

3x = 220.28 - 126.53
3x = 93.75
x = 93.75  /  3
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6 0
2 years ago
Read 2 more answers
A study was done to determine the average number of homes that a homeowner owns in his or her lifetime. For the 50 homeowners su
ipn [44]

Answer:

The 95% confidence interval for the true average number of homes that a person owns in his or her lifetime is (4,6.2).

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom,which is the sample size subtracted by 1. So

df = 50 - 1 = 49

95% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 49 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.95}{2} = 0.975. So we have T = 2.0096

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 2.0096\frac{3.8}{\sqrt{50}} = 1.1

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 5.1 - 1.1 = 4

The upper end of the interval is the sample mean added to M. So it is 5.1 + 1.1 = 6.2.

The 95% confidence interval for the true average number of homes that a person owns in his or her lifetime is (4,6.2).

7 0
2 years ago
2/18 +15/18 =17/18?
NeX [460]

Answer:

17/18

Step-by-step explanation:

2 /18  +  15 /18

=  2 /18  +  15/ 18

=  2+15 /18

=  17 /18

4 0
3 years ago
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