Question
In: Statistics and Probability
What is the best point estimate for the population's variance if the sample standard deviation is...
What is the best point estimate for the population's variance if the sample standard deviation is 3.7? Round your answer to one decimal place, if necessary.
Solutions
Expert Solution
point estimate for the population's variance = sample standard deviation2 = 3.72 = 13.69 (ans)
orchestra answered 2 years agoRelated Solutions
(a) Use the Sample Variance Definition to find the variance and standard deviation of the data.
Perform each task, given the following sample data. (Round your
answers to one decimal place.)
4
8
7
4
10
9
(a) Use the Sample Variance Definition to find the variance and
standard deviation of the data.
variance
standard deviation
(b) Use the Alternative Formula for Sample Variance to find the
variance and standard deviation of the data.
variance
standard deviation
A) Given that the sample size is 15 and the standard deviation is 2.3, the variance...
A) Given that the sample size is 15 and the standard deviation
is 2.3, the variance is
B) Given that the sample size is 25 and the variance for a data
set is 2.8, what is the standard deviation?
C) A recent survey of a new diet cola reported the following
percentages of people who liked the taste. Find the weighted mean
of the percentages.
Area
% Favored
Number surveyed
1
50
1500
2
40
2500
3
25
500
D)...
Find the SS, the variance, and the Standard Deviation of Sample A Please be sure to...
Find the SS, the variance, and the Standard Deviation of
Sample A
Please be sure to show your entire work. For each
step.
Sample A
8
10
18
1
6
11
9
10
10
7
Calculate the sample variance and sample standard deviation for the following frequency distribution of heights in...
Calculate the sample variance and sample standard deviation for
the following frequency distribution of heights in centimeters for
a sample of 8-year-old boys. If necessary, round to one more
decimal place than the largest number of decimal places given in
the data.
Heights in Centimeters
Class Frequency
120.6 - 123.6 26
123.7 - 126.7 22
126.8--129.8 34
129.9-132.9 26
133-136 44
1.Given a sample of the following values, what is the variance and standard deviation? {15, 5,...
1.Given a sample of the following values, what is the variance
and standard deviation? {15, 5, 14, 11, 5}
2.
Given the Contingency table below, calculate the probability
that an individual drawn randomly would be Under 40 and wants a
Smart Phone as a prize.
Table of Prize Choice by Age
Chosen Device
Smart Phone
Smart Watch
Totals
Ages
Under 40
30
80
110
40 and Up
50
40
90
Totals
80
120
200
Find the range, variance, and standard deviation for the given sample data, if possible. If the...
Find the range, variance, and standard deviation for the given
sample data, if possible. If the measures of variation can be
obtained for these values, do the results make sense?
Biologists conducted experiments to determine whether a
deficiency of carbon dioxide in the soil affects the phenotypes of
peas. Listed below are the phenotype codes, where
1=smooth-yellow, 2=smooth-green, 3=wrinkled yellow, and
4=wrinkled-green.
2 1 3 2 3 1 4 3 2 2 2 3 2 2 2 2 1 2...
a. The standard deviation of a sample of data was 14. Find the variance. B. Given...
a. The standard deviation of a sample of data was 14. Find the
variance.
B. Given the sample data 5, 0, 7, 5, 9, and 6, find its
range
C.
A new weight-loss program claims that participants will lose an
average of more than 10 pounds after completing it. The data table
shows the weights of five individuals before and after the
program.
1
2
3
4
5
weight before
264
220
285
264
195
weight after
240
223
267...
Calculate the sample variance and sample standard deviation for the following frequency distribution of heart rates...
Calculate the sample variance and sample standard deviation for
the following frequency distribution of heart rates for a sample of
American adults. If necessary, round to one more decimal place than
the largest number of decimal places given in the data.
Heart Rates in Beats per Minute
Class
Frequency
61 - 66
4
67 - 72
8
73 - 78
5
79 - 84
7
85 - 90
13
#1 Compute the (sample) variance and standard deviation of the data sample. (Round your answers to...
#1 Compute the (sample) variance and standard deviation of the
data sample. (Round your answers to two decimal places.)
−1, 9, 9, 2, 11
variance
standard deviation
#2 Compute the (sample) variance and standard deviation of the
data sample. (Round your answers to two decimal places.)
−8, 3, 6, 8, 0, 6
variance
standard
deviation
#3 Compute the (sample) variance and standard deviation of the
data sample. (Round your answers to two decimal places.)
2.8, −3.2, 2.5, −0.2, −0.2
variance...
Calculate the sample variance and sample standard deviation for the following frequency distribution of heart rates...
Calculate the sample variance and sample standard deviation for
the following frequency distribution of heart rates for a sample of
American adults. If necessary, round to one more decimal place than
the largest number of decimal places given in the data.
Heart Rates in Beats per Minute
Class
Frequency
61 - 66
10
67 - 72
6
73 - 78
14
79 - 84
5
85 - 90
14
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