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 50 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 $40, and the standard deviation for female consumers is assumed to be $20. What is the point estimate of the difference between the population mean expenditure for males and the population mean expenditure for females (to 2 decimals)?   At 99% confidence, what is the margin of error (to 2 decimals)?   Develop a 99% confidence interval for the difference between the two population means (to 2 decimals). Use z-table. (  ,   )

Q: newspaper reports that the average expenditure on Valentine's Day is $100.89. Do male and female…

A: Therefore, we are 99% confident that the true difference in average expenditures between male and…

Q: Would a person spending $476 on their car be considered usual or unusual if the amount spent by the…

A: Given information- Population mean µ = $347 Population standard deviation, σ = $39.58 Let, X be the…

Q: Former basketball player, Rebecca Lobo, is 6'4" (or 76 inches). Suppose the average height of women…

A: We know, (1 foot = 12 inch)Given;X: height of womenmean(X)=μ=5'4''(i.e. 5 foot 4 inches)=64''(i.e.…

Q: Round your answers to 2 decimal places. a. What is the point estimate of the difference between the…

A:

Q: Suppose you know the population average wage in the manufacturing industry in the U.S. is $26.72 per…

A: Type II error = P( Fail to reject Ho| When mu = 25)

Q: The average expenditure on Valentine's Day was expected to be $100.89  (USA Today, February 13,…

A:

Q: A newspaper reports that the average expenditure on Valentine's Day is $100.89. De male and female…

A: The question is about confidence interval.Given :No. of male consumers ( n1 ) = 40No. of female…

Q: The mean assessed value of homes in Southern County is $158,000 with a standard deviation of…

A: Old mean = E(X) = 158000 Old SD = SD(X) = 32000

Q: What is the point estimate of the difference between the population mean expenditure for males and…

A: Provided data is, the average expenditure on Valentine's Day was expected to be $100.89. The average…

Q: The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and female…

A: Solution

Q: The average McDonald's restaurant generates $3.6 million in sales each year with a standard…

A: For the MacDonald's restaurant the following information is provided. Average μ=3.6  Standard…

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: statistics professor reported that the mean score in a recent quiz is 72 and the standard deviation…

A: Solution

Q: The mean height for women in the United States is approximately 64.5 inches with a standard…

A: Formula : Z =(X - μ)/σ

Q: USA Today reports that the average expenditure on Valentine's Day was expected to be $100.89. Do…

A: Given information:

Q: The average expenditure on Valentine's Day was expected to be $108.89 (USA Today, February 13,…

A: Given: Z value = 2.576 the standard deviation for male consumers is assumed to be $33 σ1=33 the…

Q: A newspaper reports that the average expenditure on Valentine's Day is $100.89. Do male and female…

A: given data male:x¯1  = 131.67σ1 = 45n1 = 40female:x¯2  = 69.64σ2 = 20n2 = 30claim : μ1 ≠ μ2

Q: The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and female…

A:

Q: A large company has many employees and the annual salaries of those employees follow a normal…

A: X follows a Normal distribution with mean = 70000 and S.D = 12000 Then z=(x-mean)/SD =…

Q: USA Today reports that the average expenditure on Valentine's Day was expected to be $100.89. Do…

A: Given information: x¯M=131.68nM=48σM=34x¯F=65.89nF=30σF=20z=2.576

Q: The average McDonald's restaurant generates $3.4 million in sales each year with a standard…

A:

Q: USA Today reports that the average expenditure on Valentine's Day was expected to be %100.89 . Do…

A: Given: For males: n1 = 42 X1 = 137.96 σ1 = 32 For females: n2 = 37 X2 = 66.6 σ2 = 18 Formula Used:…

Q: Suppose you know the population average wage in the manufacturing industry in the U.S. is $26.72 per…

A: true mean value = 25 mu = 26.72 s = 2.6

Q: The average expenditure on Valentine's Day was expected to be $100.89  (USA Today, February 13,…

A: Given that ,The Average expenditure of 54 male consumers =$133.56The Average expenditure of 34…

Q: The average McDonald's restaurant generates $2 million in sales each year with a standard deviation…

A: Sample  (x) (x-x̄)2 1 2.6 0.1089 2 3.2 0.8649 3 2.2 0.0049 4 2.6 0.1089 5 2.2 0.0049 6…

Q: A newspaper reports that the average expenditure on Valentine's Day is $100.89. Do male and female…

A: The sample size for male group is 40, the sample mean is $138.67 and the population standard…

Q: The average McDonald's restaurant generates $3.2 million in sales each year with a standard…

A:

Q: The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and female…

A: GivenFor male For female 1)The point estimate is calculated as shown below

Q: The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and female…

A: 1. The formula for the point estimate is: The point estimate for the true difference between the…

Q: reports that the average expenditure on Valentine's Day was expected to be $100.89. Do male and…

A: Given that    Sample sizes n1=60      , n2=37   Sample means X̄1=133.15   , X̄2= 60.72     ?1 =31…

Q: (a) What is the point estimate (in dollars) of the difference between the population mean…

A: x1= 133.67x2 = 69.64   n1 = 40n2 = 30   s1 = 45s2 = 20

Q: A study by the National Center for Health Statistics suggested that women between the ages 20 and 29…

A: The objective of this question is to find the proportion of women between the ages of 20 and 29 in…

Q: Lightbulbs are measured in lumens (light output), watts (energy use), and hours (life). A standard…

A: Given:-            Standard white light bulb mean = 675 hours…

Q: USA Today reports that the average expenditure on Valentine's Day was expected to be $100.89. Do…

A: Given Male consumers Sample size, n1=44 Sample mean, x¯1=$138.99 Pop sd, σ1=$33   Female consumer…

Q: You may need to use the appropriate appendix table or technology to answer this question. A…

A: Male consumer Sample size, n1=40 Sample mean, x¯1=132.67 Population sd, σ1=45   Female consumer…

Q: On a nationwide math test, the mean was 72 and the standard deviation was 7. If Roberto scored 90,…

A: Given that, Mean = 72 Standard deviation = 7

Q: The stature of men is normally distributed, with a mean of 69.0 inches and a standard deviation of…

A: From the given information, the mean of women is 63.6 inches and standard deviation is 2.5 inches.…

Q: The average expenditure in a sample survey of 42 male consumers was $135.67, and the average…

A: Given: Population mean expenditure, μ=100.89              Sample size for men, n1= 42…

Q: What is the correct answer for letter B?

A: b. From part a. the point estimate is observed to be 67.03 and from part c. the 99% confidence…

Q: The average expenditure on Valentine's Day was expected to be $100.89. The average expenditure in a…

A: 1.