7. Suppose the National Transportation Safety Board (NTSB) wants to examine the safety of compact cars, midsize cars, and full-size cars. It collects a sample of three for each of the treatments (cars types). The hypothetical data provided below from 10 trials report the mean pressure applied to the driver’s head during a crash test for each type of car.

Compact: 635, 671, 648, 685, 648, 651, 654, 682, 687, 627

Midsize: 482, 529, 541, 518, 497, 526, 507, 492, 499, 451

Full-size: 451, 483, 464, 447, 456, 499, 484, 492, 449, 449

10. An instructor teaching algebra 1 to ninth-grade students wishes to analyze the difference between student achievement before and after the implementation of an online help resource. For 6 weeks, students worked with conventional, in-class and homework resources, and then for the next 6 weeks, an online help desk was made available to them. The scores for 6 students on a district benchmark test before and after the implementation of the online help resource are listed below.

Before: 22, 18, 33, 20, 23, 27

After: 28, 21, 32, 25, 33, 28



12. A college counselor wonders whether second semester students take fewer units than first semester students. From the population of each group (first semester and second semester), she selects 10 students at random. The following data were collected:

First semester students: 10, 12, 14, 14, 15, 15, 15, 16, 16, 18

Second semester students: 6, 9, 9, 10, 12, 12, 13, 14

Student Debt – Vermont: You take a random sample of 31 college students in the state of Vermont and find the mean debt is $25,000 with a standard deviation of $2,700. We want to construct a 90% confidence interval for the mean debt for all Vermont college students.

(a) What is the point estimate for the mean debt of all Vermont college students?
$
(b) What is the critical value of t for a 90% confidence interval? Use the value from the t-table.

(c) What is the margin of error for a 90% confidence interval? Round your answer to the nearest whole dollar.
$
(d) Construct the 90% confidence interval for the mean debt of all Vermont college students. Round your answers to the nearest whole dollar.
(  ,  )

(e) Interpret the confidence interval.

A We expect that 90% of all Vermont college students have a debt that's in the interval.

B We are 90% confident that the mean student debt of all Vermont college students is in the interval.

C We are confident that 90% of all Vermont college students have a debt that's in the interval.

D We are 10% confident that the mean student debt of Vermont college students is in the interval.

(f) We are never told whether or not the parent population is normally distributed. Why could we use the above method to find the confidence interval?

A Because the sample size is greater than or equal to 30.Because the sample size is greater than or equal to 15.   

B Because the margin of error is positive.Because the margin of error is less than or equal 30.

C Because the margin of error is positive.

D Because the margin of error is less than or equal 30.

The following is a list of six control plans, and these are followed by a list of five definitions or descriptions of control plans.

Match the five definitions or descriptions with a control plan that best matches the definition. Because there are six control plans, you should have one letter left over.

Control Plans

A. Limit checks

B. Tickler files

C. Public key cryptography

D. Compare input data with master data

E. One-for-one checking

F. Manual reconciliation of batch totals (hash totals)

Definitions or Descriptions

1. Determines if a customer number has been input correctly.

2. Ensures that transmitted

List a role of the government and explain why it should be on the list.

A picking list is a list of the parts needed to assemble a product, in this case a front bicycle wheel.

Hint: Use Item Number as your key for UNF.    

ITEM NUMBER:   W150

ITEM DESCRIPTION:   FRONT WHEEL ASSEMBLE A

PART #          DESCRIPTION                     QTY   

M300              CHAMPION RIM                     1

U600              SPECIALIZED HUB               1

S101               CHAMPION SPOKES         36

T003               SPEC TOURING TIRE           1

E102               FUJI TUBE                            1

Normalize this user view. Make sure to show your work for each view – so you should have 4 answers (e.g. Unnormalized, First Normal Form (1NF), Second Normal Form (2NF) and Third Normal Form (3NF). It is possible that some tables will be in 3NF without any changes to their 2NF status. You may just note that in your response. Also make sure to follow good DBDL protocol by capitalizing the relation name, putting attributes in parenthesis and underlining primary keys.

20. In a survey of 735 students at Broward College, North Campus, results revealed that 283 students were foreign-born and 452 were native-born. Using these results, conduct a hypothesis test to test the claim, at the .03 significance level, that the proportion of students who are born outside of the USA is greater than 35 percent. Be sure to show all the steps in the hypothesis testing procedure including the null and alternative hypotheses, the calculation of the test statistic, and correct wording of the final conclusion.

21. In a survey of 735 students at Broward College, North Campus, the mean GPA was found to be 3.02 with a standard deviation of .42. Using these results, test the claim at the .05 significance level that the mean GPA of students at North Campus is equal to 3.00. Be sure to show all the steps in the hypothesis testing procedure including the null and alternative hypotheses, the calculation of the test statistic, and correct wording of the final conclusion.

Franklin Training Services (FTS) provides instruction on the use of computer software for the employees of its corporate clients. It offers courses in the clients’ offices on the clients’ equipment. The only major expense FTS incurs is instructor salaries; it pays instructors $5,300 per course taught. FTS recently agreed to offer a course of instruction to the employees of Novak Incorporated at a price of $490 per student. Novak estimated that 20 students would attend the course.

Base your answers on the preceding information.

Required

a.Relative to the number of students in a single course, is the cost of instruction a fixed or a variable cost?

b.Determine the profit, assuming that 20 students attend the course.

c.Determine the profit, assuming a 10 percent increase in enrollment (i.e., enrollment increases to 22 students). What is the percentage change in profitability?

d.Determine the profit, assuming a 10 percent decrease in enrollment (i.e., enrollment decreases to 18 students). What is the percentage change in profitability?

100 students were asked to ll out a form with three survey questions, as follows: H: Honor Roll
C: Club membership (Robotics Club or Gaming Club)
D: Double-major

Survey results were as follows:

28 checked H (possibly non-exclusively), 26 checked C (possibly non-exclusively), 14 checked D (possibly non-exclusively)

8 checked H and C (possibly. non-exclusively), 4 checked H and D (possibly. non- exclusively), 3 checked C and D (possibly. non-exclusively)

And 2 checked all three statements.
1. How many students didn't check any of the boxes?

2. How many students checked exactly two boxes?
3. How many students checked at LEAST two boxes?

4. How many students checked the Clubs box only? [d]

a simple random sample of 5000 students were selected and asked how likely to for them to maintain a 6 feet distamce in the classrooms if they return to campus. among the sample 5000 , 76% of the students responded that they are somewhat or very likely to keep the physical distance in classrooms
(SHOW All Work) need helpp

1. University is intrested in releasing an interval estimate for the true proportion of students who would be (somewhat or very likely to keep their physical distance). What are the conditions that need to be satisfied in order for us to calculate the confidence interval. Are they satisfied?

2.) Calculate the 90% Confidence interval for the proportion (of students somewhat or very likely to keep their physical distance)?

3.)Interpret the interval calculated in part 2?

4.) Based on the interval you calculated in part 2 we can say more than 70% of penn state students would (somewhat or very likely to keep their physical distance). Explain your anwser?

Madi and Alex are both tossing a fair coin. Madi tosses hers 10 times and Alex tosses his 30 times. Which of them is more likely to get more than 60% heads or do they have the same chance? Explain why?

1.) Describe a model for Madi and Alex's coin tossing. What measures can help you decide who is more likely to get more than 60% or if they are equally likely.

2.) If you gave students this problem without doing a simulation what responses would you expect from the students in relation to the scenario?

3.) If students were using a hands on or computer simulaiton approach to analyze Madi and Alex's flipping would you expect different responses? Yes or No? If yes provide responses of what students may be doing? If no explain why students' responses would be the same with or without any type of simulation.