A random sample of 165 accountants and auditors had an average salary of $70,130 and a...

A random sample of 165 accountants and auditors had an average salary of $70,130 and a standard deviation in salary of $14,400. Another random sample of 182 loan officers had an average salary of $67,960 and a standard deviation in salary of $13,600. Construct a 98% confidence interval for the difference in mean salary between the two professions.

Expert Solution

Table for Z critical value is

orchestra answered 2 years ago

A company has 189 accountants. In a random sample of 50 of them, the average number...

A company has 189 accountants. In a random sample of 50 of them, the average number of overtime hours worked in a week was 9.7 and the sample standard deviation was 6.2 hours. a) Find a 95% confidence interval of the average number of overtime hours worked by each accountant in this company during that week. b) Find a 99% confidence interval of the total number of overtime hours worked by each accountant in this company during that week.

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2.In a sample of 15 random people from a small town, the average salary is $25,778...

2.In a sample of 15 random people from a small town, the average salary is $25,778 with a standard deviation of $11,540. Use a 5% significance level to test the claim that mean salary in this town is less than $30,000

1. A random sample of 100 construction workers found that the average monthly salary was $21,310...

1. A random sample of 100 construction workers found that the average monthly salary was $21,310 USD with a standard deviation of $2405. A random sample of 81 Office workers found that the average salary was $27,041 with a standard deviation of $4651. a.) Calculate a 95% confidence interval for the true mean difference between office workers’ salaries and construction workers’ salaries. b.) Verify your conditions for inference c.) Interpret your confidence interval with a sentence in context. d.) According...

A random sample of 23 chemists from Washington state shows an average salary of $46066 with...

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A random sample of 1515 teachers from Winnipeg produced an average annual salary of $35,270 with...

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4. (24) The average starting salary of a random sample of 100 high school students was...

4. (24) The average starting salary of a random sample of 100 high school students was found to be $31,840. The population standard deviation for all such individuals is known to be $9,840. a. (12) Ten years ago, the average starting salary was $25,000. Does the sample data support the claim that the starting salary for this group has increased? Use alpha = 0.05. b. (6) Describe in general Type I and Type II errors and the Power of the...

Q: The average starting salary of a random sample of 100 high school students was found...

Q: The average starting salary of a random sample of 100 high school students was found to be $31,840. The population standard deviation for all such individuals is known to be $9,840. a. (12) Ten years ago, the average starting salary was $25,000. Does the sample data support the claim that the starting salary for this group has increased? Use alpha = 0.05. b. (6) Describe in general Type I and Type II errors and the Power of the test....

A random sample of 15 chemists from Washington state shows an average salary of $46613 with...

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Job Title Salary Accountants and Auditors 48016.13 Actuaries 59598.07 Administrative Law Judges, Adjudicators, and Hearing Officers...

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