The manufacturer of a certain brand of auto batteries claims that the mean life of these...
The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries is 45 months. A consumer protection agency that wants to check this claim took a random sample of 24 such batteries and found that the mean life for this sample is 43.35 months. The lives of all such batteries have a normal distribution with the population standard deviation of 4.5 months. Find the p-value for the test of hypothesis with the alternative hypothesis that the mean life of these batteries is less than 45 months. Round answer to 4 decimal points.
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The manufacturer of a certain brand of auto batteries claims
that the mean life of these...
9.25 The manufacturer of a certain brand of auto batteries claims that the mean life of...
9.25 The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries is 45 months. A consumer protec- tion agency that wants to check this claim took a random sample of 24 such batteries and found that the mean life for this sample is 43.05 months. The lives of all such batteries have a normal distribution with the population standard deviation of 4.5 months. a. Find the p-value for the test of hypothesis with...
The manufacturer of a certain brand of auto batteries claims that the mean life of these...
The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries is 45 months. A consumer protection agency that wants to check this claim took a random sample of 24 such batteries and found that the mean life for this sample is 43.05 months. The lives of all such batteries have a population standard deviation of 4.5 months. Perform a hypothesis test at 10% significance level and state your decision using critical value approach....
Question 8 The mean life of a certain brand of auto batteries is 44 months with...
Question 8 The mean life of a certain brand of auto batteries is 44 months with a standard deviation of 3 months. Assume that the lives of all auto batteries of this brand have a bell-shaped distribution. Using the empirical rule, find the percentage of auto batteries of this brand that have a life of 38 to 50 months. Round your answer to one decimal place the tolerance is +/-2%
A manufacturer of calculator batteries claims that the average lifespan of her batteries is more than...
A manufacturer of calculator batteries claims that the average lifespan of her batteries is more than 1300 hours. a. Set up the null and alternative hypothesis needed to substantiate this claim, as if you had reason to believe that this claim is not being met. b. A sample of 16 batteries is tested and it is found that the sample mean is 1280 hours and σ = 40 hours. Do a test of your null hypothesis at the 1% significance...
PLEASE ANSWER CLEARLY A manufacturer of flashlight batteries claims that its batteries will last an average...
PLEASE ANSWER CLEARLY
A manufacturer of flashlight batteries claims that its batteries will last an average of 34 hours of continuous use. An analyst wants to test the claim that the mean life expectancy of the flashlight batteries is different from 34 hours. During consumer testing a random sample of 50 batteries lasted an average of 33.2 hours with a standard deviation of 2.6 hours. A One sample T summary hypothesis test: : Mean of population Ho: = 34 HAM...
A brake pad manufacturer claims that the mean life of its brake pads will last for...
A brake pad manufacturer claims that the mean life of its brake pads will last for 38,000 miles with standard deviation=1000 miles. You work for a consumer protection agency and you are testing this manufacturer’s brake pads. Assume that the life spans of the brake pads are normally distributed. (a) You examined an individual brake pad and it lasts for 37,650 miles. Calculate the probability of having an individual brake pad that lasts for 37,650 miles. Assume the manufacturer’s claim...
PLEASE ANSWER CLEARLY A manufacturer of flashlight batteries claims that its batteries will last an average...
PLEASE ANSWER CLEARLY
A manufacturer of flashlight batteries claims that its batteries will last an average of 34 hours of continuous use. An analyst wants to test the claim that the mean life expectancy of the flashlight batteries is different from 34 hours. During consumer testing, a random sample of 50 batteries lasted an average of 33.2 hours with a standard deviation of 2.6 hours. One sample T summary hypothesis test: : Mean of population Ho! = 34 HA: 34...
443. An auto manufacturer claims that its new 4-cylinder Hybrid auto with manual shift averages 50...
443. An auto manufacturer claims that its new 4-cylinder Hybrid auto with manual shift averages 50 mpg under city driving conditions. A Federal Agency believes this claim is too high and decides to randomly test 25 of the manufacturer's 4-cylinder Hybrid autos with manual shift. The Agency determines the mean average mpg for the sample to be 48 with a sample standard deviation of 4 mpg under city driving conditions. At α = 5%, the conclusion of this hypothesis test...
A manufacturer claims his light bulbs have a mean life of 1800 hours. A consumer group...
A manufacturer claims his light bulbs have a mean life of 1800 hours. A consumer group wants to test if their light bulbs do not last as long as the manufacturer claims. They tested a random sample of 270 bulbs and found them to have a sample mean life of 1790 hours and a sample standard deviation of 60 hours. Assess the manufacturer's claim. a) What is the null hypothesis? Correct: y = 1800 Incorrect x = 1800 Incorrect x...
PLEASE ANSWER CLEARLY A manufacturer of flashlight batteries claims that its batteries will last an average...
PLEASE ANSWER CLEARLY
A manufacturer of flashlight batteries claims that its batteries will last an average of 34 hours of continuous use. An analyst wants to test the claim that the mean life expectancy of the flashlight batteries is different from 34 hours. During consumer testing, a random sample of 50 batteries lasted an average of 33.2 hours with a standard deviation of 2.6 hours. A One sample T summary hypothesis test: p: Mean of population Ho: = 34 HA:...
9.25 The manufacturer of a certain brand of auto batteries claims that the mean life of these batteries is 45 months. A consumer protec- tion agency that wants to check this claim took a random sample of 24 such batteries and found that the mean life for this sample is 43.05 months. The lives of all such batteries have a normal distribution with the population standard deviation of 4.5 months. a. Find the p-value for the test of hypothesis with...
Question 8 The mean life of a certain brand of auto batteries is 44 months with a standard deviation of 3 months. Assume that the lives of all auto batteries of this brand have a bell-shaped distribution. Using the empirical rule, find the percentage of auto batteries of this brand that have a life of 38 to 50 months. Round your answer to one decimal place the tolerance is +/-2%
PLEASE ANSWER CLEARLY
A manufacturer of flashlight batteries claims that its batteries will last an average of 34 hours of continuous use. An analyst wants to test the claim that the mean life expectancy of the flashlight batteries is different from 34 hours. During consumer testing a random sample of 50 batteries lasted an average of 33.2 hours with a standard deviation of 2.6 hours. A One sample T summary hypothesis test: : Mean of population Ho: = 34 HAM...
PLEASE ANSWER CLEARLY
A manufacturer of flashlight batteries claims that its batteries will last an average of 34 hours of continuous use. An analyst wants to test the claim that the mean life expectancy of the flashlight batteries is different from 34 hours. During consumer testing, a random sample of 50 batteries lasted an average of 33.2 hours with a standard deviation of 2.6 hours. One sample T summary hypothesis test: : Mean of population Ho! = 34 HA: 34...
A manufacturer claims his light bulbs have a mean life of 1800 hours. A consumer group wants to test if their light bulbs do not last as long as the manufacturer claims. They tested a random sample of 270 bulbs and found them to have a sample mean life of 1790 hours and a sample standard deviation of 60 hours. Assess the manufacturer's claim. a) What is the null hypothesis? Correct: y = 1800 Incorrect x = 1800 Incorrect x...
PLEASE ANSWER CLEARLY
A manufacturer of flashlight batteries claims that its batteries will last an average of 34 hours of continuous use. An analyst wants to test the claim that the mean life expectancy of the flashlight batteries is different from 34 hours. During consumer testing, a random sample of 50 batteries lasted an average of 33.2 hours with a standard deviation of 2.6 hours. A One sample T summary hypothesis test: p: Mean of population Ho: = 34 HA:...
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