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A soft-drink manufacturer claims that its 12-ounce cans do not contain, on average, more than 30...
Real Fruit Juice: A 32 ounce can of a popular fruit drink claims to contain 20%...
Real Fruit Juice: A 32 ounce can of a popular fruit drink claims to contain 20% real fruit juice. Since this is a 32 ounce can, they are actually claiming that the can contains 6.4 ounces of real fruit juice. The consumer protection agency samples 56 such cans of this fruit drink. Of these, the mean volume of fruit juice is 6.32 with standard deviation of 0.23. Test the claim that the mean amount of real fruit juice in all...
An auto manufacturer claims that the average length of time that one of its cars is...
An auto manufacturer claims that the average length of time that one of its cars is owned before it requires a major repair is at least seven years. Assume that a survey of ten owners of the manufacture's cars finds that they went an average of 6 years before a major repair and the sample standard deviation for such time lengths was 1.8 years. Use the data to test the manufacture's claim at a 5% significance level. A. Give the...
The manufacturer of aerosol spray cans claims that cans must be able to withstand pressures, on...
The manufacturer of aerosol spray cans claims that cans must be able to withstand pressures, on average, greater than 500 lb/in2. Based on previous experience, it is assumed that the pressure that the cans fail is well-approximated by a normal distribution. Suppose 16 cans are randomly selected and subjected to pressure until they fail. Given that the mean failing pressure for this sample came out to be 507.6 lb/in2 and the standard deviation of this sample turned out to be...
For problems 7 and 8, an auto manufacturer claims that the average length of time that...
For problems 7 and 8, an auto manufacturer claims that the average length of time that one of its cars is owned before it requires a major repair is at least seven years. Assume that a survey of ten owners of the manufacture's cars finds that they went an average of 6 years before a major repair and the sample standard deviation for such time lengths was 1.8 years. Use the data to test the manufacture's claim at a 5%...
For problems 7 and 8, an auto manufacturer claims that the average length of time that...
For problems 7 and 8, an auto manufacturer claims that the average length of time that one of its cars is owned before it requires a major repair is at least seven years. Assume that a survey of ten owners of the manufacture's cars finds that they went an average of 6 years before a major repair and the sample standard deviation for such time lengths was 1.8 years. Use the data to test the manufacture's claim at a 5%...
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 18 phones from the manufacturer had a mean range of 1120 feet with a standard deviation of 20 feet. A sample of 13 similar phones from its competitor had a mean range of 1110 feet with a standard deviation of 25 feet. Do the results support the manufacturer's claim? Let u be the true mean...
A company claims that the mean volume of the soda in its cans is 12.0 ounces....
A company claims that the mean volume of the soda in its cans is 12.0 ounces. In a random sample of 8 of its cans, the mean is found to be 12.1 ounces. Based on past research, the population standard deviation is assumed to be 0.1 ounces. Test the claim that the mean is 12.0 ounces. Use a 0.01 level of significance. a) State the null and alternative hypotheses. b) Find the value of the test statistic. Use the appropriate...
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 99 phones from the manufacturer had a mean range of 13501350 feet with a standard deviation of 4242 feet. A sample of 1717 similar phones from its competitor had a mean range of 12801280 feet with a standard deviation of 2828 feet. Do the results support the manufacturer's claim? Let μ1μ1 be the true mean...
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 10 phones from the manufacturer had a mean range of 1250 feet with a standard deviation of 31 feet. A sample of 19 similar phones from its competitor had a mean range of 1230 feet with a standard deviation of 33 feet. Do the results support the manufacturer's claim? Let μ1 be the true mean...
A manufacturer claims that fewer than 6% of its fax machines are defective. In a random...
A manufacturer claims that fewer than 6% of its fax machines are defective. In a random sample of 100 such fax machines, 5% are defective. Find the P-value for testing the manufacturer's claim. a.0.34 b.0.33 c.0.06 d.0.16 e.0.17
For problems 7 and 8, an auto manufacturer claims that the average length of time that one of its cars is owned before it requires a major repair is at least seven years. Assume that a survey of ten owners of the manufacture's cars finds that they went an average of 6 years before a major repair and the sample standard deviation for such time lengths was 1.8 years. Use the data to test the manufacture's claim at a 5%...
For problems 7 and 8, an auto manufacturer claims that the average length of time that one of its cars is owned before it requires a major repair is at least seven years. Assume that a survey of ten owners of the manufacture's cars finds that they went an average of 6 years before a major repair and the sample standard deviation for such time lengths was 1.8 years. Use the data to test the manufacture's claim at a 5%...
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 18 phones from the manufacturer had a mean range of 1120 feet with a standard deviation of 20 feet. A sample of 13 similar phones from its competitor had a mean range of 1110 feet with a standard deviation of 25 feet. Do the results support the manufacturer's claim? Let u be the true mean...
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