# Statistics Problems

The bank sets up an experiment to test the effectiveness of the DVD. The mail it out to a random sample of delinquent customers and keep track of how many actually do contact the bank to arrange payments. The bank's statistician calculates a p-value (probability-value) of 0.003.

1. What does this p-value suggest about the effectiveness of the DVD?

A) This is low p-value which leads us to reject the null hypothesis and conclude that the DVD is more effective than sending a letter.
B) This is low p-value which leads us to reject the null hypothesis and we cannot conclude that the DVD is more effective than sending a letter.
C) This is not a low p-value so we fail to reject the null hypothesis and conclude that the DVD is more effective than sending a letter.
D) This is not a low p-value so we reject the null hypothesis and conclude that the DVD is more effective than sending a letter.
E) The p-value is not helpful in making a decision.

2. What additional information might be helpful in making the decision about the effectiveness of the DVD?

A) The results are very clear so no additional information is needed.
B) A confidence interval would be helpful since we can only state that the proportion of delinquent customers who pay after getting the DVD is greater than 30%.
C) The bank statistician should recalculate the p-value since it is probably incorrect.
D) A confidence interval would be helpful since we can only state that the proportion of delinquent customers who pay after getting the DVD is less than 30%.

1. 👍
2. 👎
3. 👁
4. ℹ️
5. 🚩
1. A market sells potatoes whose weights are normally distributed with mean 65 grams and standard deviation 15 grams.
(i) Find the probability that a randomly chosen potato weighs between 40 grams and 80 grams.
The market sells potatoes weighing more than 80 grams separately packaged. Potatoes weighing between 80 grams and L grams are labeled large and potatoes weighing over L grams are labeled as extra-large.
(ii) Given that a randomly chosen potato is twice as likely to be large as extra-large, calculate the value of L. A market sells potatoes whose weights are normally distributed with mean 65 grams and standard deviation 15 grams.

1. 👍
2. 👎
3. ℹ️
4. 🚩
2. i) 0.7937
ii) .8

1. 👍
2. 👎
3. ℹ️
4. 🚩
3. i want thecomplete solution

1. 👍
2. 👎
3. ℹ️
4. 🚩

## Similar Questions

1. ### Statistics

The effectiveness of a headache medicine is tested by measuring the intensity of a headache in patients before and after drug treatment. The data consist of before and after intensities for each patient. Identify the design of the

2. ### Economics

Bank A has a leverage ratio of 10, while Bank B has a leverage ratio of 20. Similar losses on bank loans at the two banks cause the value of their assets to fall by 7 percent. Which bank shows a larger change in bank capital? Does

3. ### math

it costs \$12.50 to see a movie at a theater near jason's house. it only costs \$1,95 to rent a dvd from an online service a dvd player costs \$125 to the nearest whole number, how many movies must jason watch on dvd instead of at

4. ### Ms.Sue! Math

A DVD store charges \$4.70 for each day, d, a DVD is rented. The store also gives you a dollar off if the DVD is returned before 5 days a. Write a rule to represent the rental charges C. b. How much will you pay if you return the

1. ### Bank Reconciliation

Aug 14th, One of our Partner's ( Compuville ) cash book showed a debit balance of \$4,000.00. His bank statement showed a balance of \$4,270.00. On comparison the following were found: * check issued amounting to \$2,500.00 has not

2. ### statistics

a random sample of 80 college students was selected to participate in a experiment. the mean of the sample is 317 points, the standard deviation of 37 there are 310 students that didn't complete the experiment 1. compute the

3. ### General Science

you plan an experiment to test the growth of beans using three different fertilizer. What are the dependent and independent variables in the experiment?

4. ### Education Technology

1. You open your e-mail inbox and see an e-mail from Toys-R-New. What type of e-mail threat could this be? a. spam********** b. scam c. phishing d. spyware 2. In your e-mail, you see an e-mail with the subject: Win \$1,000,000!

1. ### Alg.2

The membership to your local video store is flat rate of \$10/year and the DVD rental rate is \$3.95/DVD. Write an equation that models the total amount of money you will spend on DVD rentals this year. How many DVD's can you rent

2. ### statistics

1997, a survey of 940 house holds showed that 15 of them use e-mail. Use those sample results to test the claim that more than 15 % of households use email. use a 0.05 significance level. which of the following is the hypothesis

3. ### Statistics Help Please

A bank is testing a new method for getting delinquent customers to pay their past-due credit card bills. The standard way was to send a letter (costing about \$0.45) asking the customer to pay. That worked 30% of the time. The bank

4. ### Math

In a survey of 380 households regarding the ownership of VCRs and DVD players, the following data was obtained: ​ 350 households own one or more VCRs. ​180 households own one or more VCRs and one or more DVD players. ​13