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Question 8 The mean life of a certain brand of auto batteries is 44 months 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 43.35 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...
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....
a certain brand of batteries has a lifetime with a normal distribution, a mean of 3750...
a certain brand of batteries has a lifetime with a normal distribution, a mean of 3750 hours, and a standard of 300 hours. what is the probability that the batteries will last between 3800 and 4100 hours. round to 4 decimal.
The distribution of the number of months in service for the fleet of cars is bell-shaped and has a mean of 45 months and a standard deviation of 9 months
A company has a policy of retiring company cars, this policy looks at number of miles driven, purpose of trips, style of car and other features. The distribution of the number of months in service for the fleet of cars is bell-shaped and has a mean of 45 months and a standard deviation of 9 months. Using the empirical rule (as presented in the book), what is the approximate percentage of cars that remain in service between 54 and 63...
Question He A certain standardized test's math scores have a bell-shaped distribution with a mean of...
Question He A certain standardized test's math scores have a bell-shaped distribution with a mean of 530 and a standard deviation of 110. Complete parts (a) through (c). (a) What percentage of standardized test scores is between 200 and 860? H% (Round to one decimal place as needed.) (b) What percentage of standardized test scores is less than 200 or greater than 860? % (Round to one decimal place as needed.) (c) What percentage of standardized test scores is greater...
Heights of men on a baseball team have a bell-shaped distribution with a mean of 182...
Heights of men on a baseball team have a bell-shaped distribution with a mean of 182 cm and a standard deviation of 9 cm. Using the empirical rule, what is the approximate percentage of the men between the following values? a. 155 cm and 209 cm b. 173 cm and 191 cm a. nothing% of the men are between 155 cm and 209 cm. (Round to one decimal place as needed.)
Heights of men on a baseball team have a bell-shaped distribution with a mean of 179...
Heights of men on a baseball team have a bell-shaped distribution with a mean of 179 cm and a standard deviation of 8 cm. Using the empirical rule, what is the approximate percentage of the men between the following values? a. 163 cm and 195 cm b. 171 cm and 187 cm a. 1% of the men are between 163 cm and 195 cm. (Round to one decimal place as needed.) b" | % of the men are between 171...
Power +, Inc. produces AA batteries used in remote-controlled toy cars. The mean life of these...
Power +, Inc. produces AA batteries used in remote-controlled toy cars. The mean life of these batteries follows a normal distribution with a mean of 37 hours and a standard deviation of 5.6 hours. As a part of its quality assurance program, Power +, Inc. tests samples of 16 batteries. a. What can you say about the shape of the distribution of the sample mean? Sammple mean normal (already have this answered) Round answers to four decimal places....
The life spans of car batteries are normally distributed, with a mean of 62 months and...
The life spans of car batteries are normally distributed, with a mean of 62 months and a standard deviation of 5 months. (a) Find the probability that the life span of a randomly selected battery is less than 42 months. (b) Find the probability that the life span of a randomly selected battery is between 44 and 56 months. (c) What is the shortest life expectancy a car battery can have and still be in the top 5% of life...
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 He A certain standardized test's math scores have a bell-shaped distribution with a mean of 530 and a standard deviation of 110. Complete parts (a) through (c). (a) What percentage of standardized test scores is between 200 and 860? H% (Round to one decimal place as needed.) (b) What percentage of standardized test scores is less than 200 or greater than 860? % (Round to one decimal place as needed.) (c) What percentage of standardized test scores is greater...
Heights of men on a baseball team have a bell-shaped distribution with a mean of 179 cm and a standard deviation of 8 cm. Using the empirical rule, what is the approximate percentage of the men between the following values? a. 163 cm and 195 cm b. 171 cm and 187 cm a. 1% of the men are between 163 cm and 195 cm. (Round to one decimal place as needed.) b" | % of the men are between 171...
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