Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
We would like to estimate the true mean annual electricity usage by all Canadian homes. Suppose that annual electricity usage follows a normal distribution with standard deviation 1443 kilowatt hours (kWh).
(a) What sample size is required to estimate the true mean annual electricity usage to within 400 kWh with 96% confidence?
(b) What sample size is required to estimate the true mean annual electricity usage to within 100 kWh with 96% confidence?
(c) For a given confidence level, how many times larger a sample size is required when we divide the desired margin of error by four?
(d) Using only the result from (a), what sample size would be required to estimate the true mean annual electricity usage to within 800 kWh with 96% confidence?
(e) What sample size is required to estimate the true mean annual electricity usage to within 400 kWh with 99% confidence?
(f) Comparing the results from (a) and (e), what happens to the required sample size when we increase the confidence level?
Suppose we drew a histogram of these 18 death rates using class intervals 1 — 1.9, 2 — 2.9, 3 — 3.9, 4 — 4.9 and 5 — 5.9. Using the histogram, we would
Use the t test to determine whether the slope of the regression model is significant at α = 0.05.
The probability that Pete will catch fish when he goes fishing is .8. Pete is going to fish three days next week. Define the random variable x to be the number of day Pete catches fish. (hint. binomial distribution)
A research analyst regresses the number of calls for service (Y) on the Fahrenheit temperature at 4:00 in the afternoon (X). The regression equation finds: Y = 62 + 2.4 X with an r 2 of .67
Using a level of significance of .10, is there evidence that the population mean weight of the candy bars is greater than 7.3? Fully explain your answer.
At 95% confidence using the critical value approach, determine if the proportion of females in the company is significantly less than 50%.
Determine the probably of selecting a female or an accounting major? Which rule of addition did you apply?
Illustrate what amount of sales would be required to be a super savings club member. Elucidate amount of sales would be required to be a gold club status.
By using the maximax criterion, what decision should be made by the decision maker?
The instructor plans to draw a histogram of the 1,100 sample proportions. What will be the approximate mean for the 1,100 sample proportions?
At the .10 significance level, can we conclude that there is a difference in the amounts quoted?
In a marketing study, 100 consumers were asked to select the best digital music player from the iPod, the iRiver, and the Magic Star MP3. To summarize the consumer responses with a frequency table, how many classes would the frequency table have?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd