1. Design an experiment to test the hypothesis that students who have knowledge of the hindsight bias do better on exams than students who have no knowledge of this bias. Be sure to use and apply all the elements necessary to run a true experiment.

6) How many different 5-digits zip codes can we have?

A) 100,000 B) 90,000 C) 81,000 D) 80,000

7) How many different 5-digits zip codes can we have with no zero as the first digit?

A) 100,000 B) 90,000 C) 81,000 D) 80,000

8) How many different 5-digits zip codes can we have with no zero as the first and last digit?

A) 100,000 B) 90,000 C) 81,000 D) 80,000

9) A security code consists of 4 parts, two digits first (zero is allowed) and 2 letters after (not case sensitive) How many different security codes are possible? A) 77,600 B) 67,600 C) 76,700 D) 76,600

10) A security code consists of 4 parts, two digit first (but the first digit can not be zero) and 2 letters after (not case sensitive but letter “o” is not allowed for both letters) How many different security codes are possible?

A) 56,250 B) 50,265 C) 56,625 D) 50,625

11) In how many ways Joe can dress up, if he has 6 shirts, 7 pants, and 5 pair of shoes?

A) 18 B) 180 C) 210 D) 201 11

2. There is a 50% chance that you will study for the exam and earn the highest grade in the class, and a 75% chance that you will earn the highest grade in the class.

Q The probability that you will study for the exam given that you earn the highest grade in the class is:

3. Cast two dice (one red, and one green) and add the numbers facing up. Let

E: The green die shows 2 .
F: The sum is 5 .
P(E|F) =

  P(F|E) =

If you wanted to conduct a case-control study to discover whether there was a relationship between Parkinson’s disease and having worked in a high stress occupation…

A. How might you go about selecting the cases and the controls for this study?

B. Assume that after you have selected the cases and the control you have a total of 1,000 cases and 2,000 controls. You find that among the cases 200 worked in a stressful occupation and among the controls 390 worked in a stressful occupation. What would be the odds ratio describing the relationship between working in a high stress occupation and having Parkinson’s disease?

C. Interpret the meaning of this odds ratio.

To test whether extracurricular activity is a good predictor of college success, a college administrator records whether students participated in extracurricular activities during high school and their subsequent college freshman GPA.

LEFT side of column: Activity RIGHT side: College GPA

(a). Code the dichotomous variable and then compute a point-biserial correlation coefficient. (Round your answer to three decimal places.)

A Bloomberg BusinessWeek subscriber study asked, "In the past 12 months, when traveling for business, what type of airline ticket did you purchase most often?" A second question asked if the type of airline ticket purchased most often was for domestic or international travel. Sample data obtained are shown in the following table.

a. Using a .05 level of significance, is the type of ticket purchased independent of the type of flight? Use Table 12.4.

Compute the value of the  2 test statistic (to 2 decimals). ????

The American Society of PeriAnesthesia Nurses (ASPAN; www.aspan.org) is a national organization serving nurses practicing in ambulatory surgery, preanesthesia, and postanesthesia care. The organization consists of the 40 components listed below. State/Region Membership Alabama 107 Arizona 432 Maryland, Delaware, DC 608 Connecticut 302 Florida 525 Georgia 385 Hawaii 72 Illinois 415 Indiana 212 Iowa 97 Kentucky 178 Louisiana 187 Michigan 497 Massachusetts 453 Maine 70 Minnesota, Dakotas 200 Missouri, Kansas 352 Mississippi 127 Nebraska 132 North Carolina 527 Nevada 101 New Jersey, Bermuda 707 Alaska, Idaho, Montana, Oregon, Washington 708 New York 912 Ohio 908 Oklahoma 199 Arkansas 64 California 992 New Mexico 100 Pennsylvania 673 Rhode Island 70 Colorado 498 South Carolina 279 Texas 888 Tennessee 197 Utah 77 Virginia 254 Vermont, New Hampshire 114 Wisconsin 402 West Virginia 38
Find the mean, median, and standard deviation of the number of members per component. (Round your answers to 2 decimal places.) b-1.
Find the coefficient of skewness, using the software method. (Round your answer to 2 decimal places.) b-2.
What do you conclude about the shape of the distribution of component size?
Mild positive skewness Mild negative skewness
Determine the first and third quartiles. Do not use the method described by Excel. (Round your answers to 2 decimal places.) d-1
What are the limits for outliers? (Round your answers to the nearest whole number. Negative amounts should be indicated by a minus sign.) d-2.

Are there any outliers? Zero One Three Four Two

Part #1

Allen's hummingbird (Selasphorus sasin) has been studied by zoologist Bill Alther.† Suppose a small group of 13 Allen's hummingbirds has been under study in Arizona. The average weight for these birds is x = 3.15 grams. Based on previous studies, we can assume that the weights of Allen's hummingbirds have a normal distribution, with σ = 0.32 gram.

(a) Find an 80% confidence interval for the average weights of Allen's hummingbirds in the study region. What is the margin of error? (Round your answers to two decimal places.)

lower limit

upper limit

margin of error

(d) Find the sample size necessary for an 80% confidence level with a maximal margin of error E = 0.07 for the mean weights of the hummingbirds. (Round up to the nearest whole number.)

Part #2

Overproduction of uric acid in the body can be an indication of cell breakdown. This may be an advance indication of illness such as gout, leukemia, or lymphoma.† Over a period of months, an adult male patient has taken thirteen blood tests for uric acid. The mean concentration was x = 5.35 mg/dl. The distribution of uric acid in healthy adult males can be assumed to be normal, with σ = 1.91 mg/dl.

(a) Find a 95% confidence interval for the population mean concentration of uric acid in this patient's blood. What is the margin of error? (Round your answers to two decimal places.)

lower limit

upper limit

margin of error

(d) Find the sample size necessary for a 95% confidence level with maximal margin of error E = 1.06 for the mean concentration of uric acid in this patient's blood. (Round your answer up to the nearest whole number.)

Two types of survey questions are open questions and closed questions. An open question allows for any kind of​ response; a closed question allows for only a fixed response. An open question and a closed question with its possible choices are given below. List the advantages and disadvantages of each question.

Open​ question: What can be done to get students to eat healthier​ foods?

Closed​ question: How would you get students to eat healthier​ foods?

1. Mandatory nutrition course

2. Offer only healthy foods in the cafeteria and remove unhealthy foods

3. Offer more healthy foods in the cafeteria and raise the prices on unhealthy foods

What are the advantages of an open​ question? Select all that apply.

A.

An open question allows for new solutions to be introduced.

B.

It is easy to compare the results of surveys with open questions.

C.

It is easy to quantify the responses of open questions.

D.

An open question allows the respondent to go​ in-depth with their answer.

What are the disadvantages of an open​ question? Select all that apply.

A.

It is difficult to quantify the responses of open questions.

B.

An open question limits the possible responses of the respondent.

C.

It is difficult to compare the results of surveys with open questions.

D.

The form of the question may influence the opinion of the respondent.

What are the advantages of a closed​ question? Select all that apply.

A.

It is easy to quantify and compare the results of surveys with closed questions.

B.

Closed questions allow the respondent to go​ in-depth with their answers.

C.

Closed questions allow for new solutions to be introduced.

D.

It is possible to automate the collection of results for closed questions.

What are the disadvantages of a closed​ question? Select all that apply.

A.

The form of the question may influence the opinion of the respondent.

B.

Closed questions allow for new solutions to be introduced.

C.

Closed questions may not provide appropriate alternative responses.

D.

It is difficult to quantify and compare the results of surveys with closed questions.

using this model

flog(antibody ratio)jTIME, TREAT, DAYS, FEM, weight, loss, tumor} = TIME + TREAT

report a confidence interval for the difference in mean log ratio between

the BD and NS treatments.

A computer system administrator notices that computers running a particular operating system seem to freeze up more often as the installation of the operating system ages. She measures the time (in minutes) before freeze-up for seven computers one month after installation, and for nine computers seven months after installation. The results are as follows: One month after install: 207.4 233.1 215.9 235.1 225.6 244.4 245.3 Seven months after install: 84.3 53.2 127.3 201.3 174.2 246.2 149.4 156.4 102.3 Let μX represent the population mean for the first month and let μY represent the population mean for the seventh month. Find a 95% confidence interval for the difference μX−μY . Round down the degrees of freedom to the nearest integer and round the answers to three decimal places.

Week # Revenue Print Ad TV Ad

1 $20,000 $ 3,100 $ 4,100

2 $22,000 $ 2,600 $ 4,200

3 $18,000 $ 2,800 $ 4,500

4 $21,000 $ 3,300 $ 4,300

5 $20,500 $ 3,100 $ 4,000

6 $19,000 $ 2,900 $ 3,700

7 $17,500 $ 2,500 $ 3,500

8 $21,225 $ 2,800 $ 3,600

9 $23,148 $ 3,000 $ 4,100

10 $22,865 $ 3,100 $ 4,400

11 $18,596 $ 2,600 $ 3,700

12 $17,432 $ 2,500 $ 3,100

Determine a 95% and 99% confidence interval that the revenue will exceed $20,000. The sample proportion will come from the data given but the confidence interval should be for calculation based on a year of data.

Calculate the range, population variance, and population standard deviation for the following data set. If necessary, round to one more decimal place than the largest number of decimal places given in the data.

16,20,13,5,13,11,7,15,6,11

Please use Excel and show the formula you used. Thank you :)

A manufacturing process produces connecting rods whose diameter is normally distributed with mean 1.495 cm and standard deviation .05 cm. In what range will the “middle 80%” of the diameters lie? What about the “middle 98%”?

Find the regression equation for the following data set
x 143         167 143 189 175 174 134 155
y              20           80          72          69          44          59          51          63