Proportion of houses, A realty company recently announced

Proportion of houses

Reference no: EM131008564

Hypotheses. Write the null and alternative hypotheses to test each of the following situations.

a) An online clothing company is concerned about the timeliness of their deliveries. The VP of Operations and Marketing recently stated that she wanted the percentage of products delivered on time to be greater than 90%, and she wants to know if the company has succeeded.

b) A realty company recently announced that the proportion of houses taking more than three months to sell is now greater than 50%.

c) A financial firm's accounting reports that after improvements in their system, they now have an error rate below 2%.

Reference no: EM131008564

Questions Cloud

What is the value of the correlation coef?cient : Predict the volume of cerebral grey matter at age 2 to 5 years for a child whose head circumference z score at age 12 months was 1.8. Explain why it would not be a good idea to use the least-squares line to predict the volume of grey mat- ter..

Correct percentage of on-time deliveries : There's a 22% chance that the sample they drew shows the correct percentage of on-time deliveries There's a 22% chance that natural sampling variation could produce a sample with an observed proportion of on-time deliveries such as the one they obt..

How are confidence intervals calculated : A 95% confidence interval is not so much a statement about any particular interval, such as (79.3, 80.7), but pertains to what would happen if a very large number of like intervals were to be constructed. How are confidence intervals calculated

Prepare the journal entry to record the change in accounting : Assume that Weihrich used FIFO before 2011, and then in 2011 decided to switch to average cost. Prepare the journal entry to record the change in accounting principle and briefly describe any other steps Weihrich should take to appropriately report t..

Proportion of houses : A realty company recently announced that the proportion of houses taking more than three months to sell is now greater than 50%. A financial firm's accounting reports that after improvements in their system, they now have an error rate below 2%.

Reject the null hypothesis : For each of the following situations, state whether a Type I, a Type II, or neither error has been made. a) A test of H0: m = 25 vs. HA: m 7 25 rejects the null hypothesis. Later it is discovered that m = 24.9. b) A test of H0: p = 0.8 vs. HA: p 6 0..

Solve the constant-coefficient equation : Solve the constant-coefficient equation in u to find two linearly independent solution. Use part (b) to find solution of the DE when a = 1 and b = -1/2. FInd the solution when y(1) = 0 and y'(1) = 1.

What is the predictor variable : For each additional hour of television viewed per day, the number of fruit and vegetable servings per day was found to decrease on average by 0.14 serving. For this study, what is the dependent variable? What is the predictor variable?

What is the standard error of the mean : 1. Suppose that you are testing the hypotheses H0: m = 16 vs. HA: m 6 16. A sample of size 25 results in a sample mean of 16.5 and a standard deviation of 2.0. a) What is the standard error of the mean?

User Account

All Pages