This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Students of a large university spend an average of 5 a day on lunch. The standard deviation of the ... (Read 51 times)

danielfitts88

  • Hero Member
  • *****
  • Posts: 535
on: Jun 24, 2018
Students of a large university spend an average of 5 a day on lunch. The standard deviation of the expenditure is 3 . A simple random sample of 36 students is taken.
 a. What are the expected value, standard deviation, and shape of the sampling distribution of the sample mean?
 b. What is the probability that the sample mean will be at least 4?
  c. What is the probability that the sample mean will be at least 5.90?

Question 2

For the standard normal probability distribution, the area to the left of the mean is _____.
 a. .5
  b. 0.5
  c. any value between 0 and 1
  d. 1


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

brittrenee

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. 5.0; .5; normal
b. .9772
c. .0359

Answer to Question 2

b


danielfitts88

  • Member
  • Posts: 535
Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

FergA

  • Member
  • Posts: 352
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

Medication errors are more common among seriously ill patients than with those with minor conditions.

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Large intestine. Large intestine.
Large facial tumor due to malignant Burkitt’s lymphoma, a non-Hodgkin’s lymphoma. Large facial tumor due to malignant Burkitt’s lymphoma, a non-Hodgkin’s lymphoma.
Sequencing a large chromosome by individual sequence determination of cloned fragments in sequences Sequencing a large chromosome by individual sequence determination of cloned fragments in sequences
What Is a Standard Drink? What Is a Standard Drink?
As a result of a hole in the graph, which of the following functions does not have an average ... As a result of a hole in the graph, which of the following functions does not have an average ...
Find a quadractic equation that models the data in standard form Find a quadractic equation that models the data in standard form
Video: Global warming and its effect on climate change

For a complete list of videos, visit our video library