SXE company has a service standard of 4.0 hours or less. During one week, a sample...
SXE company has a service standard of 4.0 hours or less. During one week, a sample of 20 calls resulted in a sample mean of 5.0 hours with a sample standard deviation of .5. Can we conclude, statistically, that the mean service time met the service standard?
Assume alpha=.05
Homework Answers
Add Answer to:
SXE company has a service standard of 4.0 hours or less. During
one week, a sample...
A call center company requires it's operators to answer the phone in an average time of 0.17 minutes or less. A sample o...
A call center company requires it's operators to answer the phone in an average time of 0.17 minutes or less. A sample of 32 actual operator times were collected and the results were a mean time of 0.173 minutes and a standard deviation of 0.0183 min. Is this sample mean response time statistically higher than the standard? What can you conclude? Assume alpha = 0.05 Select one: a. There is statistical evidence that the mean response time exceeds the standard....
Last year, a company's service technicians took an average of 2.6 hours to respond to trouble...
Last year, a company's service technicians took an average of 2.6 hours to respond to trouble calls from business customers who had purchased service contracts. Assume respond time follows a normal distribution. This year, in an effort to improve, the company hired more service technicians. The manager randomly sampled 15 calls and found the average response time to be 2.2 hours, with a sample standard deviation of 0.4 hours. Let alpha-0. 10. ii) Calculate the test statistic Numeric Answer Type...
Q 3 Are employees who work more hours per week less satisfied with their job? Data...
Q 3
Are employees who work more hours per week less satisfied with
their job? Data was collected from a random sample of 22 employees
at a company on the following variables:
Job satisfaction (measures 0 to 100)
Total hours worked per week
Coefficients
Standard Error
intercept
120.7223
16.8721
X variable 1
-1.2033
0.3188
(a)Construct a 95% confidence interval estimate of the
population mean job satisfaction for employees who works 55 hours
per week. The sample mean total hours worked...
A past study claimed that adults in America spent an average of 18 hours a week...
A past study claimed that adults in America spent an average of 18 hours a week on leisure activities. A researcher wanted to test this claim. She took a sample of 10 adults and asked them about the time they spend per week on leisure activities. Their responses (in hours) are as follows. 11.1 12.7 20.8 20.9 23.3 33.9 17 17.9 20.2 21.2 Assume that the times spent on leisure activities by all adults are normally distributed. Using the 5%...
A past study claimed that adults in America spent an average of 18 hours a week...
A past study claimed that adults in America spent an average of 18 hours a week on leisure activities. A researcher wanted to test this claim. She took a sample of 10 adults and asked them about the time they spend per week on leisure activities. Their responses (in hours) are as follows. 12.0 13.3 22.6 22.9 22.5 33.1 16 17.2 20.1 20.3 Assume that the times spent on leisure activities by all adults are normally distributed. Using the 5%...
A researcher wants to determine a 99% confidence interval for the mean number of hours that adults spend per week doing...
A researcher wants to determine a 99% confidence interval for the mean number of hours that adults spend per week doing community service. How large a sample should the researcher select so that the estimate is within 1.4 hours of the population mean? Assume that the standard deviation for time spent per week doing community service by all adults is 3 hours.
A researcher has obtained the number of hours worked per week during the summer for a...
A researcher has obtained the number of hours worked per week during the summer for a sample of fifteen students. 40 25 35 30 20 40 30 20 40 10 30 20 10 5 20 Using this data set, compute the a. median b. mean c. mode d. 40th percentile e. range f. sample variance g. standard deviation
The Rocky Mountain district sales manager of Rath Publishing Inc., a college textbook publishing company, claims...
The Rocky Mountain district sales manager of Rath Publishing Inc., a college textbook publishing company, claims that the sales representatives make an average of 37 sales calls per week on professors. Several reps say that this estimate is too low. To investigate, a random sample of 28 sales representatives reveals that the mean number of calls made last week was 38. The standard deviation of the sample is 2.2 calls. Using the .05 significance level, can we conclude that the...
A courier service advertises that its average delivery time is less than 3 hours for deliveries...
A courier service advertises that its average delivery time is less than 3 hours for deliveries in the Vancouver area. The distribution of delivery times is known to be normal, with standard deviation 0.9 hours. A random sample of 15 deliveries yielded a sample mean delivery time of 3.2 hours. Consider a test of the null hypothesis that the population mean is 3 against the one-sided alternative that the population mean delivery time is greater than 3. (a) What is...
Will improving customer service result in higher stock prices for the companies providing the better service?...
Will improving customer service result in higher stock prices for the companies providing the better service? "When a company's satisfaction score has improved over the prior year's results and is above the national average (currently 75.7), studies show its shares have good chance of outperforming the broad stock market in the long run." The following satisfaction scores of three poll of 56 customers from each company companies for the 4th quarters of two previous years were obtained from the American...
Last year, a company's service technicians took an average of 2.6 hours to respond to trouble calls from business customers who had purchased service contracts. Assume respond time follows a normal distribution. This year, in an effort to improve, the company hired more service technicians. The manager randomly sampled 15 calls and found the average response time to be 2.2 hours, with a sample standard deviation of 0.4 hours. Let alpha-0. 10. ii) Calculate the test statistic Numeric Answer Type...
Q 3
Are employees who work more hours per week less satisfied with
their job? Data was collected from a random sample of 22 employees
at a company on the following variables:
Job satisfaction (measures 0 to 100)
Total hours worked per week
Coefficients
Standard Error
intercept
120.7223
16.8721
X variable 1
-1.2033
0.3188
(a)Construct a 95% confidence interval estimate of the
population mean job satisfaction for employees who works 55 hours
per week. The sample mean total hours worked...
A past study claimed that adults in America spent an average of 18 hours a week on leisure activities. A researcher wanted to test this claim. She took a sample of 10 adults and asked them about the time they spend per week on leisure activities. Their responses (in hours) are as follows. 11.1 12.7 20.8 20.9 23.3 33.9 17 17.9 20.2 21.2 Assume that the times spent on leisure activities by all adults are normally distributed. Using the 5%...
A courier service advertises that its average delivery time is less than 3 hours for deliveries in the Vancouver area. The distribution of delivery times is known to be normal, with standard deviation 0.9 hours. A random sample of 15 deliveries yielded a sample mean delivery time of 3.2 hours. Consider a test of the null hypothesis that the population mean is 3 against the one-sided alternative that the population mean delivery time is greater than 3. (a) What is...
Will improving customer service result in higher stock prices for the companies providing the better service? "When a company's satisfaction score has improved over the prior year's results and is above the national average (currently 75.7), studies show its shares have good chance of outperforming the broad stock market in the long run." The following satisfaction scores of three poll of 56 customers from each company companies for the 4th quarters of two previous years were obtained from the American...
Most questions answered within 3 hours.
-
Six years of quarterly data of a seasonally adjusted series are
used to estimate a linear...
asked 8 minutes ago -
Which of the following is not an ecological model used
to foster behavior change?
PRECEDE-PROCEED Model...
asked 11 minutes ago -
On the Apollo 14 mission to the moon, astronaut Alan Shepard hit
a golf ball with...
asked 8 minutes ago -
What are John’s potential claims if he is terminated
this week?
John is a 54-year-old man...
asked 21 minutes ago -
A (8.5) cm tall object is placed at a distance of (14.2) cm from
a convex...
asked 29 minutes ago -
(2) For the following questions, consider a data set that
exhibits a normal distribution. Report the...
asked 30 minutes ago -
What exactly is an information system? How does it work" What
are its people organization,
...
asked 32 minutes ago -
The Food Marketing Institute shows that 17% of households spend
more than $100 per week on...
asked 41 minutes ago -
Go to NCBI BLAST search web page
1st search: GEKDLRRAKDINQEVYNF
2nd search: PTSQRLQLLEPFDK
3rd search: GEKDLRRAKDINQEVYNF...
asked 45 minutes ago -
Explain how each of the following three conditions could be a
red flag for a register...
asked 50 minutes ago -
In a two-way factorial ANOVA, the final F-ratio for
factor AxB is determined by dividing _____...
asked 1 hour ago -
Show your solutions for answer.
4. An aqueous solution contains 9.21 g of
K4Fe(CN)6 in a...
asked 50 minutes ago