Question

Nancy believes that the average running time of movies is equal to 170 minutes. A sample...

Nancy believes that the average running time of movies is equal to 170 minutes. A sample of 7 movies was

taken and the following running times were obtained. Assume the population of the running times is normally

distributed as 158 162, 170 182,185,189,195 Using the p-value approach as well as critical value approach, test

the hypotheses at the 10% level of significance.

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
Nancy believes that the average running time of movies is equal to 170 minutes. A sample...
Nancy believes that the average running time of movies is equal to 170 minutes. A sample of 7 movies was taken and the following running times were obtained. Assume the population of the running times is normally distributed as 158 162, 170 182,185,189,195 Using the p-value approach as well as critical value approach, test the hypotheses at the 10% level of significance.
A local pizza place claims that they average a delivery time of 7.32 minutes. To test...
A local pizza place claims that they average a delivery time of 7.32 minutes. To test this claim, you order 11 pizzas over the next month at random times on random days of the week. You calculate the average delivery time and sample standard deviation from the 11 delivery times (minutes), and with the sample mean and sample standard deviation of the time (minutes), you create a 95% confidence interval of (7.648, 9.992). (delivery time is normally distributed) a. What...
A student believes that no more than 25% (i.e., ≤25%) of the students who finish a...
A student believes that no more than 25% (i.e., ≤25%) of the students who finish a statistics course get an A. A random sample of 81 students was taken. Twenty-four percent of the students in the sample received 'A's. a. State the null and alternative hypotheses and using the critical value approach, test the hypotheses at the 1% level of significance. b. Using the p-value approach, test the hypotheses at the 1% level of significance
The owner of Nick's Heating & Cooling company believes that the average time to install a...
The owner of Nick's Heating & Cooling company believes that the average time to install a new blower motor on a residential furnace is 12.5 minutes. Assume that installation time is normally distributed, and that ? = 2.7 minutes. The company owner goes through the times for a random sample of 26 furnace blower motor installations, and finds that the average installation time was 11.44 minutes. Using a significance level of ? = .05, is the company owner’s belief correct?...
The owner of Luke's Cooling company believes that the average time to install a new blower...
The owner of Luke's Cooling company believes that the average time to install a new blower motor on a residential furnace is 12.5 minutes. Assume that installation time is normally distributed, and that ? = 2.7 minutes. The company owner goes through the times for a random sample of 26 furnace blower motor installations, and finds that the average installation time was 11.44 minutes. Using a significance level of ? = .05, is the company owner’s belief correct? Conduct a...
A local retailer claims that the mean waiting time is less than 7 minutes. A random...
A local retailer claims that the mean waiting time is less than 7 minutes. A random sample of 20 waiting times has a mean of 5.5 minutes with a standard deviation of 2.1 minutes. At α = 0.01, test the retailer's claim. Assume the distribution is normally distributed. Round the test statistic to the nearest thousandth. a) State the Null and Alternate Hypotheses. b) Is this a left, right or two-tailed test? c) Find the sample test statistic. d) Use...
Homestyle Pizza of Camp Verde, Arizona, provides baking instructions for its premade pizzas. According to the...
Homestyle Pizza of Camp Verde, Arizona, provides baking instructions for its premade pizzas. According to the instructions, the average baking time is 12 to 18 minutes. If the times are normally distributed, the standard deviation for the times should be approximately 1.2 minutes. A random sample of 18 pizzas yielded the sample standard deviation s = 2.21 minutes. At 1% significance level, do the data provide sufficient evidence to conclude that the standard deviation of baking times is less than...
In Meijer supermarket, the customer’s waiting time to check out is approximately normally distributed with a...
In Meijer supermarket, the customer’s waiting time to check out is approximately normally distributed with a standard deviation of 2.5 minutes. A sample of 25 customer waiting times produced a mean of 8.2 minutes. Is this evidence sufficient to reject the supermarket’s claim that its customer checkout time averages no more than 7 minutes? Complete this hypothesis test using the 0.02 level of significance. H0: ?= 7 vs. Ha: ?>7. a) Calculate the value of the test statistic, z⋆. b)...
A student believes that no more than 20% of the students who finish a statistics course...
A student believes that no more than 20% of the students who finish a statistics course get an A. A random sample of 100 students was taken. Twenty-four percent of the students in the sample recieved A's. Using the critical value approach, test the hypotheses at the 1% level of significance.
A pizza delivery chain advertises that it will deliver your pizza 25 minutes from when the...
A pizza delivery chain advertises that it will deliver your pizza 25 minutes from when the order is placed. A random sample of 13 customers recorded the time it took for their pizzas to be delivered and found that the mean time was 27.2 minutes, with a standard deviation of 4.3 minutes. Assume the population of delivery times is normally distributed and test the claim that the mean pizza delivery time is 25 minutes using a 5% level of significance....
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT