Question

In a study investigating the effect of car speed on accident severity, 5000 reports of fatal...

In a study investigating the effect of car speed on accident severity, 5000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. For these 5000 accidents, the average speed was 43 mph and that the standard deviation was 12 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal.

(a) Roughly what proportion of vehicle speeds were between 31 and 55 mph? (Round the answer to the nearest whole number.)
Approximately  %

(b) Roughly what proportion of vehicle speeds exceeded 55 mph? (Round the answer to the nearest whole number.)
Approximately  %

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Ansa:  proportion of vehicle speeds were between 31 and 55 mph is 68 %

Ansb: proportion of vehicle speeds exceeded 55 mph is 16 %

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
In a study investigating the effect of car speed on accident severity, 5000 reports of fatal...
In a study investigating the effect of car speed on accident severity, 5000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. For these 5000 accidents, the average speed was 47 mph and that the standard deviation was 15 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal. (a) Roughly what proportion of vehicle speeds were between 32 and 62 mph? (Round the answer to the...
In a study investigating the effect of car speed on accident severity, 5000 reports of fatal...
In a study investigating the effect of car speed on accident severity, 5000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. For these 5000 accidents, the average speed was 48 mph and that the standard deviation was 16 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal. (a) Roughly what proportion of vehicle speeds were between 32 and 64 mph? (Round the answer to the...
In a study investigating the effect of car speed on accident severity, 5000 reports of fatal...
In a study investigating the effect of car speed on accident severity, 5000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. For these 5000 accidents, the average speed was 48 mph and that the standard deviation was 14 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal. (a) Roughly what proportion of vehicle speeds were between 34 and 62 mph? (Round the answer to the...
In a study investigating the effect of car speed on accident severity, 5,000 reports of fatal...
In a study investigating the effect of car speed on accident severity, 5,000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. For these 5,000 accidents, the average speed was 46 mph and the standard deviation was 14 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal. (Use the Empirical Rule.) A) Approximately what percentage of vehicle speeds were between 32 and 60 mph? B) Approximately...
In a study investigating the effect of car speed on accident severity, 5,000 reports of fatal...
In a study investigating the effect of car speed on accident severity, 5,000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. For these 5,000 accidents, the average speed was 46 mph and the standard deviation was 13 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal. (Use the Empirical Rule.) (a) Approximately what percentage of these vehicle speeds were between 33 and 59 mph? approximately...
URGENTTT 1) In a study investigating the effect of car speed on accident severity, 5,000 reports...
URGENTTT 1) In a study investigating the effect of car speed on accident severity, 5,000 reports of fatal automobile accidents were examined, and the vehicle speed at impact was recorded for each one. For these 5,000 accidents, the average speed was 46 mph and the standard deviation was 12 mph. A histogram revealed that the vehicle speed at impact distribution was approximately normal. (Use the Empirical Rule.) (a) Approximately what percentage of vehicle speeds were between 34 and 58 mph?...
1. Let z denote a random variable having a normal distribution with μ = 0 and...
1. Let z denote a random variable having a normal distribution with μ = 0 and σ = 1. Determine each of the following probabilities. (Round all answers to four decimal places.) (c) P(0.40 < z < 0.85) = (d) P(−0.85 < z < −0.40) = (e) P(−0.40 < z < 0.85) = 2. Three friends (A, B, and C) will participate in a round-robin tournament in which each one plays both of the others. Suppose that P(A beats B)...
A random sample of 20 women yields the given data on the number of minutes of...
A random sample of 20 women yields the given data on the number of minutes of exercise during the week of March 12 – 18. 10.0     90.6     48.5     50.4     57.4     99.6     0.0       5.0       0.0       0.0       5.0       2.0       10.5     5.0       47.0     0.0       5.0       54.0     0.0       48.6 Compute the Mean, Median, Range, Standard Deviation and Variance for this set of data. a) Mean b) Median c) Range d) Standard Deviation e) Variance 2. The mean reading speed of students who complete a...
What tools could AA leaders have used to increase their awareness of internal and external issues?...
What tools could AA leaders have used to increase their awareness of internal and external issues? ???ALASKA AIRLINES: NAVIGATING CHANGE In the autumn of 2007, Alaska Airlines executives adjourned at the end of a long and stressful day in the midst of a multi-day strategic planning session. Most headed outside to relax, unwind and enjoy a bonfire on the shore of Semiahmoo Spit, outside the meeting venue in Blaine, a seaport town in northwest Washington state. Meanwhile, several members of...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT