Question

furnace installation company wants to determine whether theres a difference between the installation time(in minutes) of...

furnace installation company wants to determine whether theres a difference between

the installation time(in minutes) of type A and type B furnaces. All of the 12 employees installs

one of each type. The time is recorded and the difference is taken(type A -a type B) with an

average difference of 7.5 and standard deviation of 3.2. Construct a 95% confidence interval for

the average difference of installation time between furnaces. Is there a significant difference in

installation time of the two types?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Please rate me high.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The waiting time (in minutes) at a bus stop has exponential distribution with mean >0. The...
The waiting time (in minutes) at a bus stop has exponential distribution with mean >0. The waiting times on ten occasions were recorded as follows: 6.2, 5.8, 4.5, 6.1, 4.6, 4.8, 5.3, 5.0, 3.8, 4.0 a. Construct a 95% two-sided confidence interval for the true average waiting time. b. Construct a 95% two-sided confidence interval for the true variance of the waiting time.
A study is done to determine if there is a significant difference in average GPA between...
A study is done to determine if there is a significant difference in average GPA between College A and College B. College A has a mean GPA = 3.05 and 95% confidence interval of (2.95, 3.15). College B has a mean GPA = 2.90 and 95% confidence interval of (2.80, 3.00). Is there a difference in average GPA between College A and College B? Why or why not?
A company wants to examine the average operation time for a process. Two methods were used....
A company wants to examine the average operation time for a process. Two methods were used. A random sample of 40 for the first method gives an average mean time of 20.5 minutes with variance of 3 minutes. A random sample of 50 for the second method gives an average mean time of 17.6 minutes with variance of 4 minutes. (Use normal distribution with variance known) Determine the 95% confidence interval for the difference between the means At alpha =0.05...
In a random sample of 25 ​people, the mean commute time to work was 33.2 minutes...
In a random sample of 25 ​people, the mean commute time to work was 33.2 minutes and the standard deviation was 7.1 minutes. Assume the population is normally distributed and use a​ t-distribution to construct a 95​% confidence interval for the population mean muμ. What is the margin of error of muμ​? Interpret the results. The confidence interval for the population mean muμ is (____,_______ ) ​(Round to one decimal place as​ needed.) The margin of error of muμ is...
The management of ABC Ltd. wants to determine whether there is a significant difference in the...
The management of ABC Ltd. wants to determine whether there is a significant difference in the average length of time (in minutes) employees spent on social media every day within its two regions. The following data has been accumulated for this test: Region 1 Region 2 Sample Mean 22.5 16.4 Sample Standard Deviation 10.5 12.3 Sample Size 44 43 1.   What are the null and alternative hypothesis if we want to determine whether the average length of time employees spent on...
You conducted an independent samples t-test to determine whether there is a difference in productivity between...
You conducted an independent samples t-test to determine whether there is a difference in productivity between employees who work 5-days per week versus 4-days per week. You find the average units produced for the 5-day work week is 26.6 and the average units produced for the 4-day work week is 24.4. Your standard error (of the differences) is 1.48. Using degrees of freedom of 18 and an alpha of .01, construct a 99% confidence interval.
An industrial designer wants to determine the average amount of time it takes an adult to...
An industrial designer wants to determine the average amount of time it takes an adult to assemble an "easy to assemble" toy. A sample of 16 times yielded an average time of 19.92 minutes, with a sample standard deviation of 5.73 minutes. assuming normality of assembly times, the 95% confidence interval for the mean assembly time is ?
A customer service representative was interested in comparing the average time (in minutes) customers are placed...
A customer service representative was interested in comparing the average time (in minutes) customers are placed on hold when calling Southern California Edison (SCE) and Southern California Gas (SCG) companies. The representative obtained two independent random samples and calculated the following summary information: SCE SCG Sample Size 9 12 Sample Mean 3.2 minutes 2.8 minutes Sample Standard Deviation 0.5 minutes 0.7 minutes Test whether there is a significant difference in average time a customer is on hold between the two...
A physician wants to develop criteria for determining whether a​ patient's pulse rate is​ atypical, and...
A physician wants to develop criteria for determining whether a​ patient's pulse rate is​ atypical, and she wants to determine whether there are significant differences between males and females. Use the sample pulse rates below. Male 9696 6868 7676 6464 6060 6060 8484 7272 7676 5656 Female 8888 6464 7272 8888 8484 7272 104104 7676 8484 124124 a. Construct a 95​% confidence interval estimate of the mean pulse rate for males. b. Construct a 95​% confidence interval estimate of the...
A client wants to determine whether there is a significant difference in the time required to...
A client wants to determine whether there is a significant difference in the time required to complete a program evaluation with the three different methods that are in common use. Suppose the times (in hours) required for each of 18 evaluators to conduct a program evaluation follow. Method 1 Method 2 Method 3 68 64 58 72 73 65 69 79 66 77 68 55 75 74 56 74 70 64 Use α = 0.05 and test to see whether...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT