2. You are planning a survey of starting salaries for recent computer science majors. In the...
2. You are planning a survey of starting salaries for recent computer science majors. In the latest survey by the National Association of Colleges and Employers, the average starting salary was reported to be $61,287. If you assume that the standard deviation is $3850, what sample size do you need to have a margin of error equal to $500 with 95% confidence? (report as an integer)
3. Suppose that in the setting of question 2 you have resources to contact 300 recent graduates. If all respond, what would be your margin of error? (report to the nearest integer).
4. Suppose that in the setting of question 2 you have resources to contact 300 recent graduates. If only 50% respond, what would be your margin of error? (report to the nearest integer).
Homework Answers
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2. You are planning a survey of starting salaries for recent
computer science majors. In the...
A recruiting firm report on starting salaries states that starting salaries for finance majors are skewed...
A recruiting firm report on starting salaries states that starting salaries for finance majors are skewed to the right, with a nationwide mean of $58,993. a. We collect starting salary data from a random sample of 50 recently graduated finance majors from a well- regarded business program at a large state university. Why is it okay to use these data for inference even though the population is skewed? b. The standard deviation of the 50 salaries in our sample was...
(Round up to the nearest whole number.) I need help with A,B and C Thank you...
(Round up to the nearest whole number.)
I need help with A,B and C Thank you
In preparing a report on the economy, we need to estimate the percentage of businesses that plan to hire additional employees in the next 60 days. a) How many randomly selected employers must we contact in order to create an estimate in which we are 98% confident with a margin of error of 8%? b) Suppose we want to reduce the margin of error...
please write legibly (2) (14 points) A recent survey of 8 social networking sites has a...
please write legibly
(2) (14 points) A recent survey of 8 social networking sites has a mean of 13.1 million visitors for a specific month. The standard deviation was 4.1 million. (a) (8 points) Find the 95% confidence interval of the population mean. (b) (2 points) What can we conclude about this interval? (Please use nontechnical lan- guage) (c) (4 points) Suppose we want the margin of error for the number of visitors to a social networking site for a...
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I recommend that you practice using the standard Normal tables to calculate zα/2 and tα/2 ....
I recommend that you practice using the standard Normal tables to calculate zα/2 and tα/2 . Costs are rising for all kinds of health care. The mean monthly rent at assisted-living facilities was recently reported to have increased 15% over the last five years. A recent random sample of 120 observations reported a sample mean of $3563. Assume that past studies have informed us that the population standard deviation is $650. For this problem, round your answers to 2 digits...
Please answer Problems 1-5 (with all the parts) and please show the work/steps! Thank you! 1/2...
Please answer Problems 1-5 (with all the parts) and please show
the work/steps! Thank you!
1/2 STA103_HW6.pdf Due Friday Dec 7th Problem 1. (problem 10.3 page 194) We have a simple random sample of size 4 from a population with mean u. Consider the following two estimators of u 10 10 a. Show that both μ1 and μ2 are unbiased estimators for μ. b. Which one is better? Fully justify your answer Problem 2. (Problem 10.4 page 194) Suppose that...
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PLEASE NOTE! I ONLY NEED ANSWERS TO QUESTION #8 Kate and Claire, recent college graduates, are...
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PLEASE NOTE! I ONLY NEED ANSWER TO QUESTION #7 Kate and Claire, recent college graduates, are...
PLEASE NOTE! I ONLY NEED ANSWER TO QUESTION #7 Kate and Claire, recent college graduates, are unable to find suitable jobs in their field of accounting. However, each has been involved with a small business of their own for the last several years, and have been doing very well. Kate is a talented seamstress, and has designed a line of fashionable blazers that are selling for $500/each. Kate remains shocked at how fast the orders are coming in, and wonders...
PLEASE NOTE! I ONLY NEED ANSWER TO QUESTION #6 Kate and Claire, recent college graduates, are...
PLEASE NOTE! I ONLY NEED ANSWER TO QUESTION #6 Kate and Claire, recent college graduates, are unable to find suitable jobs in their field of accounting. However, each has been involved with a small business of their own for the last several years, and have been doing very well. Kate is a talented seamstress, and has designed a line of fashionable blazers that are selling for $500/each. Kate remains shocked at how fast the orders are coming in, and wonders...
(Round up to the nearest whole number.)
I need help with A,B and C Thank you
In preparing a report on the economy, we need to estimate the percentage of businesses that plan to hire additional employees in the next 60 days. a) How many randomly selected employers must we contact in order to create an estimate in which we are 98% confident with a margin of error of 8%? b) Suppose we want to reduce the margin of error...
please write legibly
(2) (14 points) A recent survey of 8 social networking sites has a mean of 13.1 million visitors for a specific month. The standard deviation was 4.1 million. (a) (8 points) Find the 95% confidence interval of the population mean. (b) (2 points) What can we conclude about this interval? (Please use nontechnical lan- guage) (c) (4 points) Suppose we want the margin of error for the number of visitors to a social networking site for a...
Please answer Problems 1-5 (with all the parts) and please show
the work/steps! Thank you!
1/2 STA103_HW6.pdf Due Friday Dec 7th Problem 1. (problem 10.3 page 194) We have a simple random sample of size 4 from a population with mean u. Consider the following two estimators of u 10 10 a. Show that both μ1 and μ2 are unbiased estimators for μ. b. Which one is better? Fully justify your answer Problem 2. (Problem 10.4 page 194) Suppose that...
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