Question

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

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
33. A researcher claims that the average wind speed in a certain city is 8 miles...
33. A researcher claims that the average wind speed in a certain city is 8 miles per hour. In a random sample of 32 days, the average wind speed is 8.2 miles per hour. The standard deviation of the sample is 0.6 miles per hour. At α = 0.05 is there enough evidence to reject the claim?
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.
An energy company wants to choose between two regions in a state to install​ energy-producing wind...
An energy company wants to choose between two regions in a state to install​ energy-producing wind turbines. A researcher claims that the wind speed in Region A is less than the wind speed in Region B. To test the​ regions, the average wind speed is calculated for 90 days in each region. The mean wind speed in Region A is 14.1 miles per hour. Assume the population standard deviation is 2.8 miles per hour. The mean wind speed in Region...
An energy company wants to choose between two regions in a state to install energy-producing wind...
An energy company wants to choose between two regions in a state to install energy-producing wind turbines. A researcher claims that the wind speed in Region A is less than the wind speed in Region B. To test the regions, the average wind speed is calculated for 60days in each region. The mean wind speed in Region A is 13.7 miles per hour. Assume the population standard deviation is 2.8miles per hour. The mean wind speed in Region B is...
Example 2: An energy company wants to choose between two regions in a state to install...
Example 2: An energy company wants to choose between two regions in a state to install energy-producing wind turbines. A researcher claims that the wind speed in Region A is less than the wind speed in Region B. To test the regions, the average wind speed is calculated for 60 days in each region. The mean wind speed in Region A is 13.9 miles per hour. Assume the population standard deviation is 2.9 miles per hour. The mean wind speed...
A researcher claims that high-school students exercise an average (mean) of 8 hours per week. (You...
A researcher claims that high-school students exercise an average (mean) of 8 hours per week. (You think that the number is actually higher.) From a sample of 40 students, you find a mean of 9 hours with a sample standard deviation of 1 hour. Conduct a hypothesis test using a 5% significance level. a) What are the null and alternative hypotheses? b) What is the test statistic? c) What is the p-value? d) Do your reject the null hypothesis? Explain...
We wish to see if, on average, traffic is moving at the posted speed limit of...
We wish to see if, on average, traffic is moving at the posted speed limit of 65 miles per hour along a certain stretch of Interstate 70.  On each of four randomly selected days, a randomly selected car is timed and the speed of the car is recorded.  The observed speeds are 70, 65, 70, and 75 miles per hour. Assume σ= 4.08. Assuming that speeds are Normally distributed with mean µ, we test whether, on average, traffic is moving at 65...
It is advertised that the average braking distance for a small car traveling at 65 miles...
It is advertised that the average braking distance for a small car traveling at 65 miles per hour equals 120 feet. A transportation researcher wants to determine if the statement made in the advertisement is false, meaning it is different than advertised. She randomly test drives 36 small cars at 65 miles per hour and records the braking distance. The sample average braking distance is computed as 111 feet. Assume that the population standard deviation is 20 feet. Use 5%...
The population spends an average of 8 hours per day working, with a standard deviation of...
The population spends an average of 8 hours per day working, with a standard deviation of 1 hour. A certain researcher believes that Professors work less hours than average and wants to test whether the average hours per day that Profs work is different from the population. This researcher samples 10 professors and asks them how many hours they work per day, leading to the following dataset: 6, 12, 8, 15, 9, 16, 7, 6, 14, 15 Perform the appropriate...
13. Wind power scaling. Fill in the blank: A wind of 8 miles per hour produces...
13. Wind power scaling. Fill in the blank: A wind of 8 miles per hour produces _____ times as much power as a wind of 2 miles per hour. 14. Wind power at high altitudes. People have proposed building balloon-borne turbines , to capture wind power at high altitudes. Suppose at some height in the upper atmosphere, the air density is 1/100 of what it is near the Earth’s surface, but the wind speed is 10 times higher. Is thepower...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT