O (b)Which of the following correctly describes the degrees of freedom? (Select all that apply.)O If a data set has n data values, there are n - 1 degrees of freedom.O Assume a data set has 93 values and there are 92 degrees of freedom. If the sample mean and 91 of the data values are known, it ispossible to determine the other 2 data values.O Assume a data set has 90 values and there are 89 degrees of freedom. If the sample mean and 89 of the data values are known, it ispossible to determine the last data value.A data set always has degrees of freedom equal to the number of data values. The calories per serving for a random sample of 76 brands of cereal are reported.O JMP Appletimp?DistributionsCaloriesQuantilesSummary Statistics100.0% maximum250Mean140.5263299.5%250Std Dev49.60899797.5%231.5Std Err Mean5.6905423Upper 95% Mean 151.86246Lower 95% Mean 129.1901790.0%21075.0%quartile197.550.0%median1207625.0%quartile11010.0%87501001502002502.5%0.5%50500.0%minimum50Click here to access the JMP applet in a new window.O (a)What is the number of data values?O 507812049O 76How many degrees of freedom are used for constructing a confidence interval for the population mean in this situation?O 767787O 121O 75

What is the number of data values? O 50 O 78 O 120 49 O 76 How many degrees of freedom are used for constructing a confidence interval for the population mean in this situation? O 76 O 77 87 O 121 O 75

What is the number of data values? O 50 O 78 O 120 49 O 76 How many degrees of freedom are used for constructing a confidence interval for the population mean in this situation? O 76 O 77 87 O 121 O 75

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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Concept explainers

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.

Question

O (b)
Which of the following correctly describes the degrees of freedom? (Select all that apply.)
O If a data set has n data values, there are n - 1 degrees of freedom.
O Assume a data set has 93 values and there are 92 degrees of freedom. If the sample mean and 91 of the data values are known, it is
possible to determine the other 2 data values.
O Assume a data set has 90 values and there are 89 degrees of freedom. If the sample mean and 89 of the data values are known, it is
possible to determine the last data value.
A data set always has degrees of freedom equal to the number of data values.

The calories per serving for a random sample of 76 brands of cereal are reported.
O JMP Applet
imp
?
Distributions
Calories
Quantiles
Summary Statistics
100.0% maximum
250
Mean
140.52632
99.5%
250
Std Dev
49.608997
97.5%
231.5
Std Err Mean
5.6905423
Upper 95% Mean 151.86246
Lower 95% Mean 129.19017
90.0%
210
75.0%
quartile
197.5
50.0%
median
120
76
25.0%
quartile
110
10.0%
87
50
100
150
200
250
2.5%
0.5%
50
50
0.0%
minimum
50
Click here to access the JMP applet in a new window.
O (a)
What is the number of data values?
O 50
78
120
49
O 76
How many degrees of freedom are used for constructing a confidence interval for the population mean in this situation?
O 76
77
87
O 121
O 75

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