Question

A) Traffic speed is investigated at a certain section of freeway. Mean speed is 73mph. Sample...

A) Traffic speed is investigated at a certain section of freeway. Mean speed is 73mph. Sample standard deviation was 20 mph. There were 24 samples.

A researcher claims the actual speed on that freeway is more than 76 mph.

What would be the null hypothesis?

B) What would be the alternative hypothesis?

C) What kind of test are we looking at?

D) Find the critical value

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
A) A research shows families spend average of $52 for eating out each week. Population standard...
A) A research shows families spend average of $52 for eating out each week. Population standard deviation was $12. There were 36 samples. Second researcher claims the actual money spent is less than $42 per week. What would be the null hypothesis? B) What would be the alternative hypothesis? C) What kind of test are we looking at? D) Find the critical value E) Given the information, would you reject the null hypothesis or fail to reject the null hypothesis?
A researcher shows that a person averages $380 a month on gas for their vehicles with...
A researcher shows that a person averages $380 a month on gas for their vehicles with a population standard deviation of $42. there were 38 randomly sampled. A second researcher claims the actual money spent is less than $350. -What is the null hypothesis? -What is the alternative hypothesis? -What kind of test are we looking at?? One tail, Two tail, Both, or Neither? -What is the critical value? (Round to the nearest thousandth) -Would you reject the null hypothesis...
Suppose that the speed at which cars go on the freeway is normally distributed with mean...
Suppose that the speed at which cars go on the freeway is normally distributed with mean 69 mph and standard deviation 5 miles per hour. Let X be the speed for a randomly selected car. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. If one car is randomly chosen, find the probability that it is traveling more than 67 mph. c. If one of the cars is randomly...
Suppose that the speed at which cars go on the freeway is normally distributed with mean...
Suppose that the speed at which cars go on the freeway is normally distributed with mean 74 mph and standard deviation 9 miles per hour. Let X be the speed for a randomly selected car. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(,) b. If one car is randomly chosen, find the probability that it is traveling more than 72 mph. c. If one of the cars is randomly...
A traffic study was conducted on a particularly busy section of street. The peak traffic flow...
A traffic study was conducted on a particularly busy section of street. The peak traffic flow was averaged over a 5 day period and the following results were determined: peak flow mean = 160.4 cars; peak flow variance = 30.5 cars2 The traffic study was done to determine if more than 150 cars were passing through the section during peak periods on average. Hypothesis testing was performed, with the alternative hypothesis being that more than 150 cars are passing through...
Traffic speed: The mean speed for a sample of 36 cars at a certain intersection was...
Traffic speed: The mean speed for a sample of 36 cars at a certain intersection was 25.84 kilometers per hour with a standard deviation of 2.34 kilometers per hour, and the mean speed for a sample of 138 motorcycles was 38.85 kilometers per hour with a standard deviation of 3.84 kilometers per hour. Construct a 99 % confidence interval for the difference between the mean speeds of motorcycles and cars at this intersection. Let μ1 denote the mean speed of...
A researcher claims that the amounts of acetaminophen in a certain brand of cold tablets have...
A researcher claims that the amounts of acetaminophen in a certain brand of cold tablets have a standard deviation different from the ? = 3.3 mg claimed by the manufacturer. Assuming that a hypothesis test is conducted to test this claim, identify the null hypothesis H0 and the alternative hypothesis Ha.
A researcher claims that the average wind speed in a certain city is 6 miles per...
A researcher claims that the average wind speed in a certain city is 6 miles per hour. A sample of 33 days has an average wind speed of 6.5 miles per hour. The standard deviation of the population is 1 mile per hour. At 0.07 significance level, is there enough evidence to reject the claim? Determine the null hypothesis, the p-value, and state your conclusion.
A researcher claims that the average wind speed in a certain city is 8 miles per...
A researcher claims that the average wind speed in a certain city is 8 miles per hour. A sample of 32 days has an average wind speed of 8.2 miles per hour. The population standard deviation is 0.6 mile per hour. At a=0.05, do these data determine whether the average wind speed in a certain city is different from 8 miles per hour? a) state the hypothesis b) calculate the test statistic
A medical laboratory claims that the mean turn-around time for performance of a battery of tests...
A medical laboratory claims that the mean turn-around time for performance of a battery of tests on blood samples is 1.98 business days. The manager of a large medical practice believes that the actual mean is larger. A random sample of 45 blood samples yielded mean 2.05 and sample standard deviation 0.13 day. Perform the relevant test at the 10% level of significance, using these data. State the null and alternative hypotheses: Ho: H1: This is a _________ test and...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT