An orthodontist claims that their average cost for teeth straightening with metal braces is less than...
An orthodontist claims that their average cost for teeth straightening with metal braces is less than the state average of $5400. To test this claim the orthodontist randomly selects 18 patients and found that mean cost was $5250 with a standard deviation of $629 Compute the p-value and round to 3 significant decimal places..
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An orthodontist claims that their average cost for teeth
straightening with metal braces is less than...
Next Previous 3 4 5 6 Question 2 of 6 (1 point) View problem in a pop-up According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91...
Next Previous 3 4 5 6 Question 2 of 6 (1 point) View problem in a pop-up According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91 per square foot. A random sample of 37 new homes indicated that the mean cost was $121.14 and the standard deviation was $20. Can it be concluded that the mean Fo cost differs from $117.91, using the 0.10 level of significance? Use thP...
A survey claims that the average cost of a hotel room in Tulsa, Oklahoma, is less...
A survey claims that the average cost of a hotel room in Tulsa, Oklahoma, is less than $49.21. In order to test this claim, a researcher selects a sample of 26 hotel rooms and finds the average cost equal to $47.37 with a sample standard deviation of $6.42. Assume the population random variable is normal. At alpha=.1.
(2) A state executive claims that the average cost of tuition at public colleges is $5700....
(2) A state executive claims that the average cost of tuition at public colleges is $5700. A researcher wishes to test the claim that this cost is greater than $5700. She selects a random sample of 36 public colleges and finds the mean to be $5950.The population standard deviation is $659. Is there enough evidence to support the claim that the cost of tuition is greater than $5700 at a 0.05?
A local politician running for reelection claims the mean prison time for car thieves is less...
A local politician running for reelection claims the mean prison time for car thieves is less than the required 6 yrs. A sample of 80 convicted car thieves was randomly selected and the mean length of prison time was found to be 5.5 yrs. with a standard deviation of 1.25 yrs. alpha=0.05 State the claim mathematically. Is the claim the null or alternative hypothesis? State your hypotheses. Determine the test of significance (t-test or z-test) and justify your choice. State...
DMV claims that their average wait times are less than 15 minutes. A random sample of...
DMV claims that their average wait times are less than 15 minutes. A random sample of 10 people had a mean wait time of 13 minutes with a standard deviation of 3.5 minutes. Assuming wait times are normally distributed , test the claim at alpha=0.10 . Hint : One Mean, T-test.
An advertisement claims that fast food breakfast sandwiches average less than 25 grams of fat. A...
An advertisement claims that fast food breakfast sandwiches average less than 25 grams of fat. A sample of 15 sandwiches has a mean of 23.4 grams with a standard deviation of 9 grams. Using a significance level α =0.05 is there evidence to support the claim? What is the test statistic for this test?
A researcher claims that the average cost for a new home in the South is greater...
A researcher claims that the average cost for a new home in the South is greater than the average cost for a new home in the Midwest. 40 houses were randomly selected from each region with the following results South Midwest Sample Size 40 40 Sample Mean $261,500 $248,200 Population Standard Deviation $10,500 $12,000 Compute the p-value for test correct to 3 significant decimal places.
this is a statistics problem? A credit manager for Amazon’s baby division claims that the average...
this is a statistics problem? A credit manager for Amazon’s baby division claims that the average balance for charge account customers is $410. An independent auditor selects a random sample of 18 accounts and found the average balance to be $511.33 and a standard deviation of $183.75. Test the claim that the average account balances are $410 using a 5% significance level.
A wireless company claims that the average of the customers cell phone bill is less than...
A wireless company claims that the average of the customers cell phone bill is less than $90.00 per month. A sample of 75 customers reported that their average monthly bill is $84.25 with a standard deviation of $16.03. Test the claim at alpha=0.005
A manufacturer claims that the mean lifetime of its lithium batteries is less than 1095 hours....
A manufacturer claims that the mean lifetime of its lithium batteries is less than 1095 hours. A homeowner selects 27 of these batteries and finds the mean lifetime to be 1065 hours with a standard deviation of 76 hours. Test the manufacturer's claim. Use a = 0.02. P-value = 0.112 > 0.02; do not reject H0; There is not enough evidence support the claim that mean is less than 1500. ОА P-value = 0.025 0.02, do not reject HO, There...
Next Previous 3 4 5 6 Question 2 of 6 (1 point) View problem in a pop-up According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91 per square foot. A random sample of 37 new homes indicated that the mean cost was $121.14 and the standard deviation was $20. Can it be concluded that the mean Fo cost differs from $117.91, using the 0.10 level of significance? Use thP...
A manufacturer claims that the mean lifetime of its lithium batteries is less than 1095 hours. A homeowner selects 27 of these batteries and finds the mean lifetime to be 1065 hours with a standard deviation of 76 hours. Test the manufacturer's claim. Use a = 0.02. P-value = 0.112 > 0.02; do not reject H0; There is not enough evidence support the claim that mean is less than 1500. ОА P-value = 0.025 0.02, do not reject HO, There...
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