Question
In: Statistics and Probability
The average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13, 2006)....
The average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13, 2006). Do male and female consumers differ in the amounts they spend? The average expenditure in a sample survey of 46 male consumers was$134.51 , and the average expenditure in a sample survey of 31 female consumers was $63.18. Based on past surveys, the standard deviation for male consumers is assumed to be$32 , and the standard deviation for female consumers is assumed to be $18 . The z value is 2.576 . Round your answers to decimal places.
a. What is the point estimate of the difference between the population mean expenditure for males and the population mean expenditure for females?
b. At 99% confidence, what is the margin of error?
c. Develop a 99% confidence interval for the difference between the two population means.
Solutions
orchestra answered 1 year agoRelated Solutions
The average expenditure on Valentine's Day was expected to be $100.89 (USA Today, February 13, 2006)....
The average expenditure on Valentine's Day was expected to be
$100.89 (USA Today, February 13, 2006). Do male and female
consumers differ in the amounts they spend? The average expenditure
in a sample survey of 58 male consumers was $139, and the average
expenditure in a sample survey of 33 female consumers was $61.31.
Based on past surveys, the standard deviation for male consumers is
assumed to be $33, and the standard deviation for female consumers
is assumed to be...
The average expenditure on Valentine's Day was expected to be 100.89 (USA Today, February 13, 2006)....
The average expenditure on Valentine's Day was expected to be
100.89 (USA Today, February 13, 2006). Do male and female
consumers differ in the amounts they spend? The average expenditure
in a sample survey of 60 male consumers was 130.6, and the average
expenditure in a sample survey of 35 female consumers was 63.24 .
Based on past surveys, the standard deviation for male consumers is
assumed to be 30 , and the standard deviation for female consumers
is assumed...
The average expenditure on Valentine’s Day was expected to be $100.89 (USA Today, February 13, 2006)....
The average expenditure on Valentine’s Day was expected to be
$100.89 (USA Today, February 13, 2006). Do male and female
consumers differ in the amounts they spend? The average expenditure
in a sample survey of 40 male consumers was $135.67, and the
average expenditure in a sample survey of 30 female consumers was
$68.64. Based on past surveys, the standard deviation for male
consumers is assumed to be $35, and the standard deviation for
female consumers is assumed to be...
The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and...
The USA Today reports that the average expenditure on
Valentine's Day is $100.89. Do male and female consumers differ in
the amounts they spend? The average expenditure in a sample survey
of 48 male consumers was $135.67, and the average expenditure in a
sample survey of 34 female consumers was $68.64. Based on past
surveys, the standard deviation for male consumers is assumed to be
$35, and the standard deviation for female consumers is assumed to
be $23.
Develop a...
The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and...
The USA Today reports that the average expenditure on
Valentine's Day is $100.89. Do male and female consumers differ in
the amounts they spend? The average expenditure in a sample survey
of 41 male consumers was $135.67, and the average expenditure in a
sample survey of 39 female consumers was $68.64. Based on past
surveys, the standard deviation for male consumers is assumed to be
$34, and the standard deviation for female consumers is assumed to
be $22.
a. What...
The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and...
The USA Today reports that the average expenditure on
Valentine's Day is $100.89. Do male and female consumers differ in
the amounts they spend? The average expenditure in a sample survey
of 46 male consumers was $135.67, and the average expenditure in a
sample survey of 40 female consumers was $68.64. Based on past
surveys, the standard deviation for male consumers is assumed to be
$32, and the standard deviation for female consumers is assumed to
be $22.
What is...
The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and...
The USA Today reports that the average expenditure on
Valentine's Day is $100.89. Do male and female consumers differ in
the amounts they spend? The average expenditure in a sample survey
of 49 male consumers was $135.67, and the average expenditure in a
sample survey of 31 female consumers was $68.64. Based on past
surveys, the standard deviation for male consumers is assumed to be
$36, and the standard deviation for female consumers is assumed to
be $18.
What is...
The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and...
The USA Today reports that the average expenditure on
Valentine's Day is $100.89. Do male and female consumers differ in
the amounts they spend? The average expenditure in a sample survey
of 43 male consumers was $135.67, and the average expenditure in a
sample survey of 36 female consumers was $68.64. Based on past
surveys, the standard deviation for male consumers is assumed to be
$36, and the standard deviation for female consumers is assumed to
be $24. What is...
The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and...
The USA Today reports that the average expenditure on
Valentine's Day is $100.89. Do male and female consumers differ in
the amounts they spend? The average expenditure in a sample survey
of 43 male consumers was $135.67, and the average expenditure in a
sample survey of 30 female consumers was $68.64. Based on past
surveys, the standard deviation for male consumers is assumed to be
$30, and the standard deviation for female consumers is assumed to
be $19.
What is...
The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and...
The USA Today reports that the average expenditure on
Valentine's Day is $100.89. Do male and female consumers differ in
the amounts they spend? The average expenditure in a sample survey
of 48 male consumers was $135.67, and the average expenditure in a
sample survey of 34 female consumers was $68.64. Based on past
surveys, the standard deviation for male consumers is assumed to be
$40, and the standard deviation for female consumers is assumed to
be $23.
What is...
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