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I have been traveling via air without wi-fi and am behind. I would appreciate help with the following questions that concern Hypothesis Testing: Work each
I have been traveling via air without wi-fi and am behind. I would appreciate help with the following questions that concern Hypothesis Testing:
Work each of the problems on your own paper, clearly label the 5 steps. If no method is specified, use both the P-Value method and the Critical Value Method. Include appropriate sketches and calculator commands used. Refer to the notes as needed.
- Brewery Bottles A local brewery distributes beer in bottles labeled 12 ounces. A government agency thinks that the brewery is cheating its customers. The agency selects 50 of these bottles, measures their contents, and obtains a sample mean of 11.7 ounces with a population standard deviation of 0.70 ounce. Use a 0.01 significance level to test the agencys claim that the brewery is cheating its customers.
- Fast Food Wait Times A fast food outlet claims that the mean waiting time in line is less than 3.5 minutes. A random sample of 60 customers has a mean of 3.6 minutes with a population standard deviation of 0.6 minute. If = 0.05, test the fast food outlets claim using critical values and rejection regions.
- Speeding Tickets A local group claims that the police issue at least 60 speeding tickets a day in their area. To prove their point, they randomly select one month. Their research yields the number of tickets issued for each day. The data are listed below. Assume the population standard deviation is 12.2 tickets.
At = 0.01, test the groups claim.
70 48 41 68 69 55 70 57 60 83 32 60 72 58 88 48 59 60 56 65 66 60 68 42 57 59 49 70 75 63 44
- Light Bulb Lifetime A manufacturer claims that the mean lifetime of its fluorescent bulbs is 1300 hours. A homeowner selects 25 bulbs and finds the mean lifetime to be 1270 hours with a standard deviation of 80 hours. Test the manufacturers claim. Use = 0.05.
- Teacher Sick Days A local school district claims that the number of school days missed by its teachers due to illness is below the national average of = 5. A random sample of 28 teachers provided the data below. At = 0.05, test the districts claim using P-values.
- 0363354135731233241625283125
- Voting Fifty-five percent of registered voters in a congressional district are registered Democrats. The Republican candidate takes a poll to assess his chances in a two-candidate race. He polls 1200 potential voters and finds that 621 plan to vote for the Republican candidate. Does the Republican candidate have a chance to win? Use = 0.05.
- Engineering Majors The engineering school at a major university claims that 20% of its graduates are women. In a graduating class of 210 students, 58 were women. Does this suggest that the school is believable? Use = 0.05.
- Telephone Lines A telephone company claims that 20% of its customers have at least two telephone lines. The company selects a random sample of 500 customers and finds that 88 have two or more telephone lines. If = 0.05, test the companys claim using critical values and rejection regions.
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