Question

Young and Company claims that its pressurized diving bell will, on average, maintain its integrity to...

Young and Company claims that its pressurized diving bell will, on average, maintain its integrity to depths of 2500 feet or more. You take a random sample of 50 of the bells. The average maximum depth for bells in your sample is 2455 feet. Set up an appropriate hypothesis test using Young and Company’s claim as the null hypothesis. Assume the population standard deviation is 200 feet. Use a 5% significance level. What is the p-value that you calculate for this sample? Can you reject the company's claim at the 1% level?

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A company claims that the average monthly expenditure of its customers is greater than $175. The...
A company claims that the average monthly expenditure of its customers is greater than $175. The results of a sample of customers’ monthly expenditures is below. ?̅= 176, ? = 10, ? = 50 At ? = 0.01 , is there enough evidence to support the company’s claim? 1). State the hypothesis and label which represents the claim: : H 0 : H a 2). Specify the level of significance  = 3). Sketch the appropriate distribution and label it...
JR Carpetech, Inc. Claims that the average cost of carpet installation and repairs is Php19760. A...
JR Carpetech, Inc. Claims that the average cost of carpet installation and repairs is Php19760. A sample of 60 repairs has an average of Php17880. The standard deviation of the sample is Php1000. At α=0.05, is there enough evidence to reject the company’s claim? What should be the null hypothesis? What should be your alternative hypothesis? What is the level of significance? What is the test statistic? What type of test of significance should be used? What is the decision...
1. A company claims that the average lifespan of a bicycle tire that they manufacture is...
1. A company claims that the average lifespan of a bicycle tire that they manufacture is 1200 miles. You randomly and independently collect a sample of 31 of these tires and find that the average distance these tires lasted was 1125.7 miles, with a standard deviation of 275 miles. A 90% confidence interval for the population mean lifetime of these tires is (1041.9, 1209.5). Select all true statements. a. The confidence interval indicates that the company's claim that their tires...
A manufacturer claims that the calling range (in feet) of its 900-MHz cordless telephone is greater...
A manufacturer claims that the calling range (in feet) of its 900-MHz cordless telephone is greater than that of its leading competitor. A sample of 11 phones from the manufacturer had a mean range of 1240 feet with a standard deviation of 24 feet. A sample of 18 similar phones from its competitor had a mean range of 1230 feet with a standard deviation of 28 feet. Do the results support the manufacturer's claim? Let ?1 be the true mean...
A consumer advocate group claims the average American household spends more than $874 during Christmas. The...
A consumer advocate group claims the average American household spends more than $874 during Christmas. The claim is tested with a sample of 64 households and finds the average of the sample to be $905 with a standard deviation of $125. Level of significance is 0.05. Answer the following: a) write Ho and Ha and identify which is the claim b) identify whether its left, right or two tailed c) write the p-value d) decide whether to reject or fail...
A manufacturer claims that the calling range (in feet) of its 900-MHz cordless telephone is greater...
A manufacturer claims that the calling range (in feet) of its 900-MHz cordless telephone is greater than that of its leading competitor. A sample of 19 phones from the manufacturer had a mean range of 1160 feet with a standard deviation of 32 feet. A sample of 11 similar phones from its competitor had a mean range of 1130 feet with a standard deviation of 23 feet. Do the results support the manufacturer's claim? Let μ1 be the true mean...
The psychology department at a certain college claims that the grades in its introductory course are...
The psychology department at a certain college claims that the grades in its introductory course are distributed as follows: 8% As, 20% Bs, 30% Cs, 22% Ds, and 20% Fs. In a poll of 200 randomly selected students who had completed this course, it was found that 16 received As; 40, Bs; 70, Cs; 43, Ds; and 31, Fs. Does this sample contradict the department's claim at the .05 level? (a) Find the test statistic. (Give your answer correct to...
A hair dryer manufacturer claims that the mean life of its product is greater than 700...
A hair dryer manufacturer claims that the mean life of its product is greater than 700 hours. A random sample of 40 of its motors have a mean life of 702 hours. It is known that the standard deviation of the lifetime of the motors is 15 hours. At  = 0.06, is there enough evidence to reject the company's claim? Perform a thorough hypothesis test on your work including: Identification of the null and alternative hypotheses and indication of which is...
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 company claims that the average lifespan of a bicycle tire that they manufacture is 1200...
A company claims that the average lifespan of a bicycle tire that they manufacture is 1200 miles. You randomly and independently collect a sample of 31 of these tires and find that the average distance these tires lasted was 1125.7 miles, with a standard deviation of 275 miles. You suspect the company is overstating how long their tires last. You formulate your suspicion as a left tailed hypothesis test. Your null hypothesis is "the average lifespan of these tires is...