Question

the national highway traffic safety administration stated that the percentage of people who used their seatbelts...

the national highway traffic safety administration stated that the percentage of people who used their seatbelts in the year 2002 was 71% . the nhtsa also reported that a random sample of 3005 people showed that 2104 reported using their seatbelts in 2012. conduct a hypothesis test at a significance level of 10% to see weather the percentage of people who used their seatbelts in 2012 changed from 71% reported in the year 2002

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

Homework Answers

Answer #1

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
1. The National Highway Traffic Safety Administration (NHTSA) states that the percentage of people who used...
1. The National Highway Traffic Safety Administration (NHTSA) states that the percentage of people who used their seatbelts in the year 2001 was 72%. The NHTSA also reported that a random sample of 3000 people showed that 2210 reported using their seatbelts in 2011. Conduct a hypotheses test at a significance level of 5% to see whether thepercentage of people who used their seatbelts in 2011 changed from the 72% reported the year 2001
The National Highway Traffic Safety Administration reported the percentage of traffic accidents occurring each day of...
The National Highway Traffic Safety Administration reported the percentage of traffic accidents occurring each day of the week. Assume that a sample of 420 accidents provided the following data. Sunday Monday Tuesday Wednesday Thursday Friday Saturday 69 47 54 49 58 69 74 a. Conduct a hypothesis test to determine if the proportion of traffic accidents is the same for each day of the week. What is the p-value? Compute the value of the X2 test statistic (to 3 decimals)....
3. The US. Department of Transportation, National Highway Safety Traffic Safety Administration reported that 77% of...
3. The US. Department of Transportation, National Highway Safety Traffic Safety Administration reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 65 automobile driver fatalities in Dallas County (1996) showed that 43 involved an intoxicated driver. Construct a 96% confidence interval to estimate the proportion of all Dallas County automobile driver fatalities who were intoxicated. Based on your interval, do you think that the Dallas County rate is substantially lower than the national rate?...
The National Highway Traffic Safety Administration reports the number of traffic fatalities for 2011, 2012 and...
The National Highway Traffic Safety Administration reports the number of traffic fatalities for 2011, 2012 and 2013 for various types of a passenger cars.              Subcompact Compact   Intermediate Full-Size Other   Total 2011      1352              3801         4066              2647         148     12014 2012     1360              3866         4088              2860         187      12361 2013     1206              3610          4083              2830         248     11977 Total     3918             11277         12237           8337          583     36352 (a)   Draw a bar chart for the distribution of year (total), (b)   Draw a pie chart for the distribution of year...
The National Highway Traffic Safety Administration reports the number of traffic fatalities for 2011, 2012 and...
The National Highway Traffic Safety Administration reports the number of traffic fatalities for 2011, 2012 and 2013 for various types of a passenger cars.              Subcompact Compact   Intermediate Full-Size Other   Total 2011      1352              3801         4066              2647         148     12014 2012     1360              3866         4088              2860         187      12361 2013     1206              3610          4083              2830         248     11977 Total     3918             11277         12237           8337          583     36352 (a)   Draw a bar chart for the distribution of year (total), (b)   Draw a pie chart for the distribution of year...
_____ According to the National Highway and Traffic Safety Administration, the proportion of fatal traffic accidents...
_____ According to the National Highway and Traffic Safety Administration, the proportion of fatal traffic accidents in the U.S. in which the driver had a positive blood alcohol concentration (BAC) is 0.36. Suppose a random sample of 105 traffic fatalities in the state of Hawaii results in 41 that involved a positive BAC. Does the sample evidence suggest that Hawaii has a higher proportion of traffic fatalities involving a positive BAC than the general U.S.? Test at the 0.05 level...
The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally...
The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 54 records of automobile driver fatalities in a certain county showed that 35 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use α = 0.05. (a) What is the level of significance? State the null and alternate...
the U.S. department of transportation, national highway traffic safety administration, reported that 77% of all fatally...
the U.S. department of transportation, national highway traffic safety administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 29 records of automobile driver fatalities in kit Carson county, Colorado, showed that 15 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in kit carson county? use level of significance =0.01. Solve the problem using both the traditional method and the...
The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally...
The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 50 records of automobile driver fatalities in a certain county showed that 33 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use α = 0.10. a) what is the level of significance? State the null and alternate...
The National Highway Traffic Safety Administration indicated that 284 people died between 1990 and 2007 as...
The National Highway Traffic Safety Administration indicated that 284 people died between 1990 and 2007 as a result of an injury caused by an airbag. Newer airbags open at a speed proportional to the speed of an impact. Older models open at a constant speed, up to 200mph, equal to the force of a heavyweight knockout punch. A random sample of 40 older-model airbags was obtained and tested. The average opening speed for each older-model airbag was 173.88. Airbag opening...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT