Question
In: Statistics and Probability
In a study of speed dating, male subjects were asked to rate the attractiveness of their...
In a study of speed dating, male subjects were asked to rate the attractiveness of their female dates, and a sample of the results is listed below (1equalsnot attractive; 10equalsextremely attractive). Construct a confidence interval using a 90% confidence level. What do the results tell about the mean attractiveness ratings of the population of all adult females? 5, 7, 2, 9, 7, 6, 6, 8, 9, 10, 3, 8
Solutions
Expert Solution
Confidence interval for Population mean is given as below:
Confidence interval = Xbar ± t*S/sqrt(n)
From given data, we have
Xbar = 6.666666667
S = 2.424621183
n = 12
df = n – 1 = 11
Confidence level = 90%
Critical t value = 1.7959
(by using t-table)
Confidence interval = Xbar ± t*S/sqrt(n)
Confidence interval = 6.666666667 ± 1.7959*2.424621183/sqrt(12)
Confidence interval = 6.666666667 ± 1.2570
Lower limit = 6.666666667 - 1.2570 = 5.41
Upper limit = 6.666666667 + 1.2570 = 7.92
Confidence interval = (5.41, 7.92)
We are 90% confident that the mean attractiveness ratings will lies between 5.41 and 7.92.
orchestra answered 2 years agoRelated Solutions
In a study of speed dating, male subjects were asked to rate the attractiveness of their...
In a study of speed dating, male subjects were asked to rate
the attractiveness of their female dates, and a sample of the
results is listed below (1equalsnot attractive; 10equalsextremely
attractive). Construct a confidence interval using a 90%
confidence level. What do the results tell about the mean
attractiveness ratings of the population of all adult females? 5,
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In a study of speed dating, male subjects were asked to rate the attractiveness of their...
In a study of speed dating, male subjects were asked to rate
the attractiveness of their female dates, and a sample of the
results is listed below
(1=not attractive; 10=extremely attractive). Construct a
confidence interval using a 99% confidence level. What do the
results tell about the mean attractiveness ratings of the
population of all adult females?
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(Round to one decimal place as needed.)
In a study of speed dating, male subjects were asked to rate the attractiveness of their...
In a study of speed dating, male subjects were asked to rate
the attractiveness of their female dates, and a sample of the
results is listed below (1 equals =not attractive; 10 equals
=extremely attractive). Construct a confidence interval using a
99% confidence level. What do the results tell about the mean
attractiveness ratings of the population of all adult
females?
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In a study of speed dating, male subjects were asked to rate the attractiveness of their...
In a study of speed dating, male subjects were asked to rate
the attractiveness of their female dates, and a sample of the
results is listed below (1equalsnot attractive; 10equalsextremely
attractive). Construct a confidence interval using a 95%
confidence level. What do the results tell about the mean
attractiveness ratings of the population of all adult females?
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In a study of speed dating, male subjects were asked to rate the attractiveness of their...
In a study of speed dating, male subjects were asked to rate
the attractiveness of their female dates, and a sample of the
results is listed below (1equalsnot attractive; 10equalsextremely
attractive). Construct a confidence interval using a 90%
confidence level. What do the results tell about the mean
attractiveness ratings of the population of all adult females? 5,
7, 2, 9, 7, 6, 6, 8, 9, 10, 3, 8
In a study of speed dating, male subjects were asked to rate the attractiveness of their...
In a study of speed dating, male subjects were asked to rate
the attractiveness of their female dates, and a sample of the
results is listed below
(1equals=not
attractive;
10equals=extremely
attractive). Construct a confidence interval using a
90%
confidence level. What do the results tell about the mean
attractiveness ratings of the population of all adult females?
8,
9,
2,
8,
6,
5,
6,
9,
7,
8,
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In a study of speed dating, male subjects were asked to rate the attractiveness of their...
In a study of speed dating, male subjects were asked to rate
the attractiveness of their female dates, and a sample of the
results is listed below (1equalsnot attractive; 10equalsextremely
attractive). Construct a confidence interval using a 95%
confidence level. What do the results tell about the mean
attractiveness ratings of the population of all adult females?
8,9,3,8,7,6,8,8,8,10,4,9
What is the confidence interval for the population mean μ?
In a study of speed dating, male subjects were asked to rate the attractiveness of their...
In a study of speed dating, male subjects were asked to rate
the attractiveness of their female dates, and a sample of the
results is listed below (1equalsnot attractive; 10equalsextremely
attractive). Construct a confidence interval using a 99%
confidence level. What do the results tell about the mean
attractiveness ratings of the population of all adult females? 5,
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In a study of speed dating, male subjects were asked to rate the attractiveness of their...
In a study of speed dating, male subjects were asked to rate
the attractiveness of their female dates, and a sample of the
results is listed below (1 =not attractive; 10 equals=extremely
attractive). Construct a confidence interval using a 95%
confidence level. What do the results tell about the mean
attractiveness ratings of the population of all adult females?
7, 8, 2, 8, 4, 4, 6, 7, 7, 10, 6, 8
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n a study of speed dating, male subjects were asked to rate the attractiveness of their...
n a study of speed dating, male subjects were asked to rate the
attractiveness of their female dates, and a sample of the results
is listed below
(1=not
attractive;
10=extremely
attractive). Construct a confidence interval using a
99%
confidence level. What do the results tell about the mean
attractiveness ratings of the population of all adult females?
5,
7,
2,
9,
4,
6,
7,
8,
7,
10,
6,
8
What is the confidence interval for the population mean
μ?...
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