## This problem uses the attached file. Based on the following output, please answer this question: is the main

 Tests of Between-Subjects Effects Dependent Variable:   The grade level Source Type III Sum of Squares df Mean Square F Sig. Corrected Model .833a 1 .833 3.169 .078 Intercept 282.133 1 282.133 1072.773 .000 StudentType .833 1 .833 3.169 .078 Error 31.033 118 .263 Total 314.000 120 Corrected Total 31.867 119 a. R Squared = .026 (Adjusted R Squared = .018)

This problem uses the attached file. Based on the following output, please answer this question: is the main effect of Student type significant or not?

F(1,118) = ?, p = .078. Does it show that the average grade level is roughly the same for the two student groups? Please explain all work.

## Using the below exhibit formulate a statistical hypothesis appropriate for the consumer

Using the below exhibit formulate a statistical hypothesis appropriate for the consumer group’s purpose, then calculate the mean average miles per gallon. compute the sample variance and sample standard deviation. determine the most appropriate statistical test using 0.05 significance level.

 purchaser miles per gallon Purchaser miles per gallon 1 30.9 13 27 2 24.5 14 26.7 3 31.2 15 31 4 28.7 16 23.5 5 35.1 17 29.4 6 29 18 26.3 7 28.8 19 27.5 8 23.1 20 28.2 9 31 21 28.4 10 30.2 22 29.1 11 28.4 23 21.9 12 29.3 24 30.9

## Q15. If one city has a higher CPI than another city, the city with the higher CPI must have a higher cost of living.

Q15. If one city has a higher CPI than another city, the city with the higher CPI must have a higher cost of living.
a. true
b. false

If banks had \$10 million in legal reserves, \$105 million in checkable deposits, and a 10 percent reserve requirement, they would have to reduce their checkable deposits or increase their reserves.
a. true
b. false

Q17. Nominal wages can be converted into real wages by
a. multiplying the nominal wages by the CPI
b. adding the CPI to the nominal wages
c. subtracting the CPI from the nominal wages
d. dividing the nominal wages by the CPI

Q20. According to the equation of exchange, if total output is 2,000 units, the velocity of money is 5, and the money supply is \$1,000, the average price per transaction will be
a. \$0.50
b. \$2.50
c. \$5.00
d. \$7.50

Q37. Which of the following Fed actions would increase the level of total bank reserves?
b. selling securities to commercial banks
c. reducing reserve requirements
d. raising the discount rate

Q42. According to the Keynesian analysis, equilibrium occurs at the point where total aggregate expenditure equals total output.
a. true
b. false

## 10. As a result of higher expected inflation, (Points : 1)

 10. As a result of higher expected inflation, (Points : 1)

the demand and supply curves for loanable funds both shift to the right and the equilibrium interest rate usually rises.
the demand and supply curves for loanable funds both shift to the left and the equilibrium interest rate usually falls.
the demand curve for loanable funds shifts to the right, the supply curve for loanable funds shifts to the left, and the equilibrium interest rate usually rises.
the demand curve for loanable funds shifts to the left, the supply curve for loanable funds shifts to the right, and the equilibrium interest rate usually rises.

the demand and supply curves for loanable funds both shift to the right and the equilibrium interest rate usually rises.
the demand and supply curves for loanable funds both shift to the left and the equilibrium interest rate usually falls.
the demand curve for loanable funds shifts to the right, the supply curve for loanable funds shifts to the left, and the equilibrium interest rate usually rises.
the demand curve for loanable funds shifts to the left, the supply curve for loanable funds shifts to the right, and the equilibrium interest rate usually rises.

## After a number of complaints about its directory assistance

 After a number of complaints about its directory assistance, a telephone company examined samples of calls to determine the frequency of wrong numbers given to callers. Each sample consisted of 110 calls.

 SAMPLE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Number of errors 6 3 5 2 2 6 3 3 5 10 3 2 5 4 6 5 a. Determine 95 percent limits. (Do not round your intermediate calculations. Round your final answers to 3 decimal places.)

 UCL LCL  b. Is the process stable (i.e., in control)?

Yes

No

## Problem: Given the following printout, answer questions a through e

Problem: Given the following printout, answer questions a through e.
>t.test(math~female)
Welch Two Sample t-test
data: math by gender
t = -0.411, df = 187.575, p-value = 0.6816
95 percent confidence interval:
-3.193325 2.092206
sample estimates:
mean in group female mean in group male
52.39450 52.94505
a) State the null and the alternative hypothesis in symbols and words.

b) What is your conclusion regarding the null? (Reject or fail to reject)

.

c) Write your conclusion within context.

d) Interpret the 95% confidence interval.

e) Find the relevant descriptive on R and show how the t value and confidence interval was calculated? (The data is attached hsb2.csv)

## suppose you know σ and you want an 85% confidence level. What value would you use as z in formula of

 suppose you know σ and you want an 85% confidence level. What value would you use as z in formula of confidence interval for a population mean? (Round your answer to 2 decimal places.)

 Value of z [removed]

 a. The sample size is 15 and the level of confidence is 95%.

 Value of t [removed]

 b. The sample size is 24 and the level of confidence is 98%.

 Value of t [removed]

 c. The sample size is 12 and the level of confidence is 90%.

 Value of t

 Past surveys reveal that 30% of tourists going to Las Vegas to gamble spend more than \$1,000. The Visitor’s Bureau of Las Vegas wants to update this percentage.

 a. The new study is to use the 90% confidence level. The estimate is to be within 1% of the population proportion. What is the necessary sample size? (Round your answer to the next whole number.)

 Sample size [removed]

 b. The Bureau feels the sample size determined above is too large. What can be done to reduce the sample? Based on your suggestion, recalculate the sample size. (Hint: Use an allowable error in the range of 0.01 to 0.05) (Round your answer to the next whole number.)

 Sample size [removed]

 Forty-nine items are randomly selected from a population of 500 items. The sample mean is 40 and the sample standard deviation 9.

 Develop a 99% confidence interval for the population mean. (Round your answers to 3 decimal places.)

 The confidence interval is between   [removed] and [removed]

## Below is the profit model spreadsheet for a shoe manufacturer in the month of January. 1)

Below is the profit model spreadsheet for a shoe manufacturer in the month of January. 1) Calculate the revenue for units sold. 2) Calculate the variable cost of production. 3) Calculate the total profit

 Profit Model for January Cost in Dollars Unit Price 49 Unit Cost 23 Fixed Cost for Production 350,000 Demand 40,000 Model Unit Price 49 Quantity Sold 38,000 Revenue Unit Cost 23 Quantity Produced 38,000 Variable Cost Fixed Cost 300,000 Profit

## Pond’s Age-Defying Complex, a cream with alpha hydroxy acid,

Pond’s Age-Defying Complex, a cream with alpha hydroxy acid, advertises that it canreduce wrinkles and improve the skin. In a study published in Archives of Dermatology(recent year), 33 middle-aged women used a cream with alpha hydroxy acid for 22weeks. At the end of the study period, a dermatologist judged whether each womanexhibited skin improvement. The results for the 33 women are listed below.

 Improved Improved No improvement Improved No improvement No improvement Improved Improved Improved Improved Improved Improved No improvement Improved Improved Improved No improvement Improved Improved Improved No improvement Improved No improvement Improved Improved Improved Improved Improved Improved No improvement Improved Improved No improvement

a) MINITAB Output. Enter these data into a MINITAB worksheet all in onecolumn. Use Skin Cream as your header. Select Stat > Basic Statistics > 1-Proportion… Complete the dialog in order to obtain a 97 percent confidenceinterval.
b) Based on the 97% confidence interval for women exhibiting noimprovement, do you have sufficient evidence to conclude that the creamwill improve the skin of more than 60% of middle-aged women? Explain

## In an analysis of hunting by African lions, biologists filmed prey captures

In an analysis of hunting by African lions, biologists filmed prey captures from the safety of their vehicles.  Prey captures were then divided into a sequence of events.   One of the events is the stalk, defined as the reduction of predator-prey distance for prey that has been specifically targeted.  The investigators identified two types of stalk: (a) “crouching,” — the lion is concealed and either the lion advances toward the prey or the prey advances (unaware) toward the lion, and (b) “running,” — the lion is less concealed and advances toward the prey in a rapid manner.

Data on lions’ stalks of wildebeests and zebras from a simple random sample of 159 kills appear in the table below.

 Characteristic Numeric value Mean stalking time 31.6 min Standard deviation of stalk time 16.4 min Proportion of stalks of the crouching type 0.92

The same monitoring of radio-collared lions over the years suggests that the overall proportion of stalks that are the crouching type is about 0.87. Do the data above provide evidence that for this population of lions the proportion of crouching stalks of wildebeests and zebras is greater than what was originally thought? Use alpha=0.05