Question

Find the population variance for the following data set: 13,
23, 26, 17, 21

Answer #1

**Solution:**

We have to find the population variance for the following data set: 13, 23, 26, 17, 21

Formula:

x |
x^{2} |
---|---|

13 | 169 |

23 | 529 |

26 | 676 |

17 | 289 |

21 | 441 |

n = number of observations = 5

thus

Find the population variance and standard deviation for the set
of data: 13, 7, 21, 4, 15, 23, 7,
6.

Consider the following data:
25
24
18
20
21
18
16
20
23
17
15
13
19
23
24
20
16
26
21
24
15
22
16
12
20
23
19
26
20
25
21
19
21
25
23
26
21
19
20
14
(a)
Develop a frequency distribution
using classes of 12-14, 15-17, 18-20, 21-23, and 24-26.
Class
Frequency
12-14
15-17
18-20
21-23
24-26
Total
(b)
Develop a relative frequency
distribution and a percent frequency distribution using the classes...

1) Find the sample variance and standard deviation
15
36
21
20
17
14
2)Find the population variance and standard deviation for the
following population.
12 4 17 7 24 26

12, 16, 21, 14, 21, 20, 17, 13, 18, 22
Find a 95% CI for the population mean assuming the population
variance is 12.
From your CI above do you think the population mean could be 24?
State Yes or No and why.
Find a 90% CI for the population mean assuming the population
standard deviation is unknown.
From your CI above do you think the population mean could be
18?
State Yes or No and why.
Find a 90%...

Which data set would produce the following 5-number summary?
16, 21, 24, 26, 28
Group of answer choices
24, 18, 22, 23, 23, 21, 28
24, 18, 22, 25, 30, 21, 20
24, 16, 22, 28, 26, 21, 24
24, 16, 22, 25, 28, 21, 24

Consider the following data from a random sample: 23 12 26 14 20
25 14 11 21 14 25 21 22 21 8 19 17 22 17 16
a.) Construct a stem-and-leaf plot and specify the five-number
index (min, Q1, Q2, Q3, & max)
b.) Compute the mean and the standard deviation
c.) Find a 95% confidence interval for the population mean.

For the following set of data, find the population standard
deviation, to the nearest hundredth.
Data
Frequency
17
3
22
6
23
2
27
6
29
8
32
2
35
8
36
5
37
5

using the following data set, create a box plot for
this question.
17, 32, 27, 14, 18, 34, 16, 41, 28, 24, 40, 26, 23,
31, 37, 21, 30, 28

Which of the following would be the variance of this population
data set: 3, 9, 8, 9, 4, 5, 7, 11, 9, 7, 5, 4, 3, 1
Which of the following would be the standard deviation of this
sample data set: 67, 54, 17, 77, 92, 41, 75, 81

Consider the following data set.
14
27
13
14
15
14
11
13
21
11
25
26
29
a)
Determine the quartiles for this data.
b)
Determine the interquartile range for this data.
a)
The first quartile is
nothing,
the second quartile is
nothing,
and the third quartile is
nothing.
(Type integers or decimals.)
b)
The interquartile range is
nothing.
(Type an integer or a decimal.)

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