TUTORIAL
A company compared the variance of salaries for employees who have been employed for 5 years or less with employees who have been employed for 10 years or more. They randomly selected 21 employees with 5 years or less experience and 15 employees with 10 years or more experience. The standard deviation for the group with 5 years or less experience was $2,225; the standard deviation for the group with 10 years or more experience was $1,875. Using the 0.05 significance level, what is the F critical value for the hypothesis test
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THERE IS QUESTION AND ANSWERS FOR #36 AND #37.... I HAVE GIVEN U THE ANSWERS....I JUST...
THERE IS QUESTION AND ANSWERS FOR #36 AND #37.... I
HAVE GIVEN U THE ANSWERS....I JUST NEED THE STEP BY STEP
SOLUTION.
Use the traditional method to test the given hypothesis. Assume that the population is normally distributed and that the sample has been randomly selected. 36) A machine dispenses a liquid drug into bottles in such a way that the standard deviation of 36) the contents is 81 milliliters. A new machine is tested on a sample of 24...
The salaries of the employees of a corporation are normally distributed with a mean of $25,000...
The salaries of the employees of a corporation are normally distributed with a mean of $25,000 and a standard deviation of $5,000. a. What is the probability that a randomly selected employee will have a starting salary of at least $31,000? b. What percentage of employees has salaries of less than $12,200? c. What are the minimum and the maximum salaries of the middle 95% of the employees? d. If sixty-eight of the employees have incomes of at least $35,600,...
It is known from past years that the average IQ of Commack elementary students is at...
It is known from past years that the average IQ of Commack elementary students is at least 110. The principal thinks that this is an overestimate, and that the average IQ of students here is less than 110. The principal administers an IQ test to 20 randomly selected students. Among the sampled students, the average IQ is 104 with a standard deviation of 10. Assume a significance level of 0.05 and conduct a hypothesis test.
(1 pt) Randomly selected 22 student cars have ages with a mean of 7.6 years and...
(1 pt) Randomly selected 22 student cars have ages with a mean of 7.6 years and a standard deviation of 3.4 years, while randomly selected 10 faculty cars have ages with a mean of 5.4 years and a standard deviation of 3.5 years. 1. Use a 0.05 significance level to test the claim that student cars are older than faculty cars. (a) The test statistic is (b) The critical value is (c) Is there sufficient evidence to support the claim...
Exercise 1. The director of a state agency believes that the average starting salary for clerical...
Exercise 1. The director of a state agency believes that the average starting salary for clerical employees in the state is less than $30,000 per year. To test her hypothesis, she has collected a simple random sample of 100 starting clerical salaries from across the state and found that the sample mean is $29,750. State the appropriate null and alternative hypotheses. Assuming the population standard deviation is known to be $2,500 and the significance level for the test is to...
The director of a stage agency believes that the average starting salary for clerical employees in...
The director of a stage agency believes that the average starting salary for clerical employees in the state is less than $30,000 per year, to test her hypothesis; she has collected a simple random sample of 100 starting clerical salaries from across the state and found that the sample mean is $ 29,750. State the appropriate null and alternative hypotheses. Assuming the population standard deviation is known to be $2,500 and the significance level for the test is to be...
15) Find the critical value that defines the rejection region for the following hypothesis test: Is...
15) Find the critical value that defines the rejection region for the following hypothesis test: Is the average life expectancy of Americans more than 78.8 years? To test this claim, a sample of 400 Americans are studied, with an average lifespan of 79.4 years and a standard deviation of 3.9 years. Use a significance level of 0.05. A) 1.649 B) 1.645 C) 3.08 D) -1.649 E) None of the Above 16) A large software company gives job applicants a test...
15) Find the critical value that defines the rejection region for the following hypothesis test: Is...
15) Find the critical value that defines the rejection region for the following hypothesis test: Is the average life expectancy of Americans more than 78.8 years? To test this claim, a sample of 400 Americans are studied, with an average lifespan of 79.4 years and a standard deviation of 3.9 years. Use a significance level of 0.05. A) 1.649 B) 1.645 C) 3.08 D) -1.649 E) None of the Above 16) A large software company gives job applicants a test...
9. The Wechsler IQ test is designed so that the mean is 100 and the standard...
9. The Wechsler IQ test is designed so that the mean is 100 and the standard deviation is 15 for the population of normal adults. Listed below are IQ scores of randomly selected professional pilots. It is claimed that because professional pilots are a more homogeneous group than the general population. Use a 0.05 significance level to test the claim that pilots have IQ scores with a standard deviation less than 15. Do not use the p-value. 121 116 115...
17) Use the traditional method to test the given hypothesis. Assume that the population is normally...
17) Use the traditional method to test the given hypothesis. Assume that the population is normally distributed and that the sample has been randomly selected. Heights of men aged 25 to 34 have a standard deviation of 2.9. Use a 0.05 significance level to test the claim that the heights of women aged 25 to 34 have a different standard deviation. The heights (in inches) of 16 randomly selected women aged 25 to 34 are listed below. Round the sample...
THERE IS QUESTION AND ANSWERS FOR #36 AND #37.... I
HAVE GIVEN U THE ANSWERS....I JUST NEED THE STEP BY STEP
SOLUTION.
Use the traditional method to test the given hypothesis. Assume that the population is normally distributed and that the sample has been randomly selected. 36) A machine dispenses a liquid drug into bottles in such a way that the standard deviation of 36) the contents is 81 milliliters. A new machine is tested on a sample of 24...
(1 pt) Randomly selected 22 student cars have ages with a mean of 7.6 years and a standard deviation of 3.4 years, while randomly selected 10 faculty cars have ages with a mean of 5.4 years and a standard deviation of 3.5 years. 1. Use a 0.05 significance level to test the claim that student cars are older than faculty cars. (a) The test statistic is (b) The critical value is (c) Is there sufficient evidence to support the claim...
15) Find the critical value that defines the rejection region for the following hypothesis test: Is the average life expectancy of Americans more than 78.8 years? To test this claim, a sample of 400 Americans are studied, with an average lifespan of 79.4 years and a standard deviation of 3.9 years. Use a significance level of 0.05. A) 1.649 B) 1.645 C) 3.08 D) -1.649 E) None of the Above 16) A large software company gives job applicants a test...
15) Find the critical value that defines the rejection region for the following hypothesis test: Is the average life expectancy of Americans more than 78.8 years? To test this claim, a sample of 400 Americans are studied, with an average lifespan of 79.4 years and a standard deviation of 3.9 years. Use a significance level of 0.05. A) 1.649 B) 1.645 C) 3.08 D) -1.649 E) None of the Above 16) A large software company gives job applicants a test...
9. The Wechsler IQ test is designed so that the mean is 100 and the standard deviation is 15 for the population of normal adults. Listed below are IQ scores of randomly selected professional pilots. It is claimed that because professional pilots are a more homogeneous group than the general population. Use a 0.05 significance level to test the claim that pilots have IQ scores with a standard deviation less than 15. Do not use the p-value. 121 116 115...
17) Use the traditional method to test the given hypothesis. Assume that the population is normally distributed and that the sample has been randomly selected. Heights of men aged 25 to 34 have a standard deviation of 2.9. Use a 0.05 significance level to test the claim that the heights of women aged 25 to 34 have a different standard deviation. The heights (in inches) of 16 randomly selected women aged 25 to 34 are listed below. Round the sample...
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