Question

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 44 male consumers was $132.32, and the average
expenditure in a sample survey of 32 female consumers was $67.83.
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 $10. 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. ________ to _________

Answer #1

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 50 male consumers was $135.13 and the average
expenditure in a sample survey of 39 female consumers was $65.59.
Based on past surveys, the standard deviation for male consumers is
assumed to be $31 , and the standard deviation for female consumers
is assumed to...

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 50 male consumers was $135.13 and the average
expenditure in a sample survey of 39 female consumers was $65.59.
Based on past surveys, the standard deviation for male consumers is
assumed to be $31 , and the standard deviation for female consumers
is assumed to...

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 56 male consumers was $130, and the average
expenditure in a sample survey of 34 female consumers was $66.
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...

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 $140, and the average
expenditure in a sample survey of 34 female consumers was $69.
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). Do male and female
consumers differ in the amounts they spend? The average expenditure
in a sample survey of 52 male consumers was $140, and the average
expenditure in a sample survey of 38 female consumers was $62.
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). Do male and female
consumers differ in the amounts they spend? The average expenditure
in a sample survey of 50 male consumers was $135.78 , and the
average expenditure in a sample survey of 39 female consumers was
63.35. 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...

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 44 male consumers was $136.81, and the
average expenditure in a sample survey of 37 female consumers was
$63.26. 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...

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 $134.44, and the
average expenditure in a sample survey of 33 female consumers was
$63.97. Based on past surveys, the standard deviation for male
consumers is assumed to be $31, 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 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 37 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 female consumers differ in
the amounts they spend? The average expenditure in a sample survey
of 44 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
$32, and the standard deviation for female consumers is assumed to
be $18.
What is...

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