Homework Answers
Add Answer to:
3, The manager of a machine shop wishes to estimate the mean time μ an operator...
3, The manager of a machine shop wishes to estimate the mean time μ an operator...
3, The manager of a machine shop wishes to estimate the mean time μ an operator needs to complete a simple task. The shop has 100 operators. A simple random sample of 10 operators is selected. The times (in minutes) to complete the task are as follows: 4.2 5.1 5.9 5.8 5.3 4.6 5.1 4.1 5.4 4.5 (a) (3 marks). Briefly describe how a table of random numbers could be used to draw a simple random sample of 10 operators...
The owner of an oil change shop would like to know the mean time it takes...
The owner of an oil change shop would like to know the mean time it takes to do an oil change at the shop. He takes a random sample of 16 cars that are serviced and finds a sample average of 20.5 minutes and a standard deviation of 7.4 minutes Construct a 90% confidence interval for the true mean time to do an oil change to a car. a) Lower Bound b) Upper Bound
7. Digital Viewing Times According to eMarketer, the average time spent per day with digital media...
7. Digital Viewing Times According to eMarketer, the average time spent per day with digital media in 2010 was 3 hours and 14 minutes. For last year, a random sample of 20 Americans adults spent the following number of hours per day with digital media. 1.4 5.0 5.8 4.1 5.6 2.1 6.5 2.3 8.0 9.5 7.3 5.9 9.4 4.3 2.9 2.8 5.1 4.5 4.1 6.6 Find and interpret a 90% confidence interval for the mean time spent with digital media...
A random sample of 49 cherry shop customers was taken. The sample’s mean amount of time...
A random sample of 49 cherry shop customers was taken. The sample’s mean amount of time these cus-tomers stayed in the shop was 30 minutes with a sample standard deviation of 10 minutes. Develop a 95% confidence interval estimate for the mean of the population by answering this a) What is the margin of error? b) What is the confidence interval? c) Interpret your answer
Saved 2023 A sample of 100 bank customer waiting times are given in the following table:...
Saved 2023 A sample of 100 bank customer waiting times are given in the following table: Waiting Times (in Minutes) for the Bank Custoner Waiting Tine Case 4.5 9.7 11.8 10.4 4.2 7.e 5.5 8.7 8.8 5.1 5.4 4.5 6.2 3.9 8.7 7.6 4.7 4.0 4.0 10.1 .3 2.8 5.4 6.5 9.7 5.2 7.0 5.8 4.5 8.2 1.9 5.2 4.1 7.9 5.3 8.8 6.2 4.1 4.1 4.5 10.4 .2 7.0 6.8 5.5 8.3 11.3 5.9 8.8 2.8 6.7 5.5 5.e...
The produce manager at a grocery store claims that Granny Smith apples weight a mean of...
The produce manager at a grocery store claims that Granny Smith apples weight a mean of 4 ounces. (FYI: Granny Smith apples are the green ones.) You are a quality control representative and are testing to see if the claim is reasonable or not. The data below represent a POPULATION of scores from which you are to take a SAMPLE. Your sample size will be ten (10) apples. Your task is to take a sample of 10 scores to test...
An inexperienced on-line instructor would like to estimate the mean time that it takes her students...
An inexperienced on-line instructor would like to estimate the mean time that it takes her students to complete one of her tests. She takes a random sample of 30 test times and finds that the mean in the sample is 36 minutes with a standard deviation in the sample of 3 minutes. Which of the following would be the appropriate calculation for constructing a 98% confidence interval to estimate the mean test time for all of her students? 2.34.726 <u...
An inexperienced on-line instructor would like to estimate the mean time that it takes her students...
An inexperienced on-line instructor would like to estimate the mean time that it takes her students to complete one of her tests. She takes a random sample of 30 test times and finds that the mean in the sample is 36 minutes with a standard deviation in the sample of 3 minutes. Which of the following would be the appropriate calculation for constructing a 98% confidence interval to estimate the mean test time for all of her students? a. 34.726...
(b) (3 marks). Estimate the total τ in the 1000 retirement homes and place a bound...
(b) (3 marks). Estimate the total τ in the 1000 retirement homes and place a bound on the error of estimation (c) (3 marks). Using the given sample results, determine how many of the 1000 retirement homes the public agency should sample in a future survey to estimte the total number of residents τ in the 1000 retirement homes with a bound on the error of estimation of magnitude B 5000. 2. A public agency is interested in learning more...
Annie is a researcher who wants to find a confidence interval estimate of the mean time...
Annie is a researcher who wants to find a confidence interval estimate of the mean time it takes to complete an order over the phone at a call center for a large retail company. She has selected a random sample of 18 orders and recorded the time to complete the order. The sample mean time was 4.27 minutes and the sample standard deviation was 0.78 minutes. Assuming the conditions needed for inference are met,which of the following is the appropriate...
3, The manager of a machine shop wishes to estimate the mean time μ an operator needs to complete a simple task. The shop has 100 operators. A simple random sample of 10 operators is selected. The times (in minutes) to complete the task are as follows: 4.2 5.1 5.9 5.8 5.3 4.6 5.1 4.1 5.4 4.5 (a) (3 marks). Briefly describe how a table of random numbers could be used to draw a simple random sample of 10 operators...
7. Digital Viewing Times According to eMarketer, the average time spent per day with digital media in 2010 was 3 hours and 14 minutes. For last year, a random sample of 20 Americans adults spent the following number of hours per day with digital media. 1.4 5.0 5.8 4.1 5.6 2.1 6.5 2.3 8.0 9.5 7.3 5.9 9.4 4.3 2.9 2.8 5.1 4.5 4.1 6.6 Find and interpret a 90% confidence interval for the mean time spent with digital media...
Saved 2023 A sample of 100 bank customer waiting times are given in the following table: Waiting Times (in Minutes) for the Bank Custoner Waiting Tine Case 4.5 9.7 11.8 10.4 4.2 7.e 5.5 8.7 8.8 5.1 5.4 4.5 6.2 3.9 8.7 7.6 4.7 4.0 4.0 10.1 .3 2.8 5.4 6.5 9.7 5.2 7.0 5.8 4.5 8.2 1.9 5.2 4.1 7.9 5.3 8.8 6.2 4.1 4.1 4.5 10.4 .2 7.0 6.8 5.5 8.3 11.3 5.9 8.8 2.8 6.7 5.5 5.e...
An inexperienced on-line instructor would like to estimate the mean time that it takes her students to complete one of her tests. She takes a random sample of 30 test times and finds that the mean in the sample is 36 minutes with a standard deviation in the sample of 3 minutes. Which of the following would be the appropriate calculation for constructing a 98% confidence interval to estimate the mean test time for all of her students? 2.34.726 <u...
An inexperienced on-line instructor would like to estimate the mean time that it takes her students to complete one of her tests. She takes a random sample of 30 test times and finds that the mean in the sample is 36 minutes with a standard deviation in the sample of 3 minutes. Which of the following would be the appropriate calculation for constructing a 98% confidence interval to estimate the mean test time for all of her students? a. 34.726...
(b) (3 marks). Estimate the total τ in the 1000 retirement homes and place a bound on the error of estimation (c) (3 marks). Using the given sample results, determine how many of the 1000 retirement homes the public agency should sample in a future survey to estimte the total number of residents τ in the 1000 retirement homes with a bound on the error of estimation of magnitude B 5000. 2. A public agency is interested in learning more...
Annie is a researcher who wants to find a confidence interval estimate of the mean time it takes to complete an order over the phone at a call center for a large retail company. She has selected a random sample of 18 orders and recorded the time to complete the order. The sample mean time was 4.27 minutes and the sample standard deviation was 0.78 minutes. Assuming the conditions needed for inference are met,which of the following is the appropriate...
Most questions answered within 3 hours.
-
Why has California been the favorite destination of large number
of secondary migrants?
asked 19 minutes ago -
Do not neglect the old for the new. The existing business must
not lose priority simply...
asked 3 hours ago -
Kylie is a single mom with two dependent children,
Tanner, age 7 and Olivia, age 11....
asked 4 hours ago -
Phosphorous + bromine = phosphorous tribromide. If 35.0 g of
bromine are reacted and 27.9 grams...
asked 6 hours ago -
Derive the long wavelength limit of the Planck energy density
distribution
asked 5 hours ago -
Calculate the pH of each of the following solutions.
0.50 M HBr
3.1×10−4 M KOH
4.2×10−5...
asked 9 hours ago -
For the year ended December 31, Depot Max’s cost of merchandise
sold was $85,600. Inventory at the...
asked 9 hours ago -
Week 10 - Professional Memo Assignment
Professional Memo Assignment
Your mission for this week, should you...
asked 9 hours ago -
Write a Python program that stores the data for each
player on the team, and it...
asked 9 hours ago -
In
the last 3 months, mike never knows when he is going to get his
allowance...
asked 10 hours ago -
Is Ca(OH)2 a Bronsted base, Lewis base, or both? Why?
asked 10 hours ago -
1A- Why don’t voters complain about U.S. tariffs on imported
sugar?
Because sugar is only a...
asked 10 hours ago