Question: In a study on speed control, it was found that the main reasons for regulations were to make traffic flow efficient and to minimize the

In a study on speed control, it was found that the main reasons for regulations were to make traffic flow efficient and to minimize the risk of danger. An area that was focused on in the study was the distance required to completely stop a vehicle at various speeds. Use the following table to answer the questions.

MPH 20 30 40 50 60 80 Braking distance (feet) 20 45

Assume MPH is going to be used to predict stopping distance.

Requirements:

1 Which of the two variables is the independent variable? Why?

2 Which is the dependent variable? Why?

3 What type of variable (quantitative: continuous or discrete; qualitative: nominal or rank) is the independent variable?

4 What type of variable is the dependent variable? See above

5 Construct a scatter plot for the data. Label your X and Y axes and show the points.

6 IS there a relationship between the two variables?

7 IS the relationship positive or negative? Why?

8 Suppose the correlation coefficient (r) is 0.966? Does this suggest a strong relationship? Explain

9 What would you conclude about the relationship if r=0?

10 Does correlation mean causation?

MPH 20 30 40 50 60 80 Braking distance (feet) 20 45 81 133 205 411

Step by Step Solution

★★★★★

3.43 Rating (153 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

To address these questions lets analyze the scenario and the data 1 Independent Variable Answer The independent variable is MPH Miles Per Hour Reason ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

In determining automobile mileage ratings, it was found that the mpg in the city for a certain model is normally distributed, with a mean of 24 mpg and a standard deviation of 1.0 mpg. Suppose that...

In a hospital study, it was found that the standard deviation of the sound level from 20 areas designated as casualty doors was 4.1 dBA and the standard deviation of 24 areas designated as operating...

In a recent study by MIT, it was found that the Toyota Prius, a hybrid, was less environmentally responsible than a Hummer SUV. How could this be? You might want consider using the AT&T Environmental...

In a study on speed control, it was found that the main reasons for regulations were to make traffic flow more efficient and to minimize the risk of danger. An area that was focused on in the study...

Business Research Methodology- Question Bank 1 1. When the marketing department of an organization attempts to determine the amount of time the managers in this department spend at their computers in...

10. An experimenter has some degree of control over the: a. independent variable. b. correlative variable. c. history effect. d. All of the above, if the experiment is conducted properly. 11. If a...

Hello, I havetwo articles about S Corp. and C Corp., and IJUST need towrite a conclusion paragraph based on professor's questions. can you help me to write it? Articles are attached Accounting...

Question 18 1pts A Z score is also a percentile rank. True False Flag this Question Question 19 1pts Regression lines are used for comparison of two variables to determine similarity. True False Flag...

need answers for questions 13, 17, 19, 20, and 23? PART 5 Business Valuations Chapter Business Valuations A valuation analyst should be able to explain and defend his or her valuation, including both...

Given the following information on two mutually exclusive projects. Cost of capital is 11 percent. Which project should be chosen based on IRR? Based onNPV? Year Year 10 (200,000) Cashflovw 0...

Dutchik Company had no jobs in progress at the beginning of June and no beginning inventories. It started only two jobs during the month Job A and Job B. Job A was completed and sold by the end of...

what is the lifetime value of a single customer who stays with SOTARG after his / her purchase of a SOTARG inkjet printer in the current Christmas sales?

Presented below is information related to Dickinson Company for 2012. Retained earnings balance, January 1, 2012 $ 980,000 Sales revenue 25,000,000 Cost of goods sold 16,000,000 Interest revenue...

Timmer Bachman founded the Bachman Corporation over 25 years ago. The companys genesis was the unique climbing apparatus developed by Timmer, an avid mountaineer. Bachman Corporation has continued to...

The printout of the Revenues and Appropriations subsidiary ledger accounts for the General Fund of the City of Augusta as of March 31, 2017, appeared as follows: Required Assuming that this printout...

New tire retreading equipment, acquired at a cost of $140,000 at the beginning of a fiscal year, has an estimated useful life of four years and an estimated residual value of $10,000. The manager...

Tiffany Lamp Company produces stained glass lamps appropriate for home and office use. The company expects sales to total approximately $50 million for the current year. Tiffanys management team has...

The June 30, 2020 pre-closing trial balance for the general fund of Richmond County is shown below: Debit Credit Cash $ 27,000 Property taxes receivable 40,000 Allowance for uncollectible taxes $...

1. Methodology 1.1 Data Collection This study employed the quantitative method. 400 questionnaires were distributed to three public universities located in Kelantan namely Universiti Malaysia...

You have been contracted by the City of Sydney Council to inspect an issue that has been reported by residents living in a western suburb. The residents claim that one of the roads in their suburb...

A study of bicycle riders found that a male cyclist's speed X (in miles per hour over a 100 mile 'century" ride) and weight 1' (kg) could be modeled by a bivariate Gaussian PDF fx,y(x, y) with...

Test scores on a Statistics final had a mean of 78 with a standard deviation of 16. Luisa earned a score of 82 on the final. Which of the following is the correct interpretation of her z-score?...

please help Ramp metering is a traffic engineering idea that requires cars entering a freeway to stop for a certain period of time before joining the trafc ow. The theory is that ramp metering...

The federal highway commission wanted to study if speed limit and auto fatalities were related. Below are the speed limits of 8 randomly selected highways (that are similar in length) and the...