« previous next »

Author Question: Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible ... (Read 60 times)

craiczarry

  • Hero Member
  • *****
  • Posts: 527
on: Jun 24, 2018
Of five letters (A, B, C, D, and E), two letters are to be selected at random. How many possible selections are there?
 a. 20
  b. 7
  c. 5
  d. 10

Question 2

A random sample of 100 credit sales in a department store showed an average sale of 120.00 . From past data, it is known that the standard deviation of the population is 40.00.
 a. Determine the standard error of the mean.
  b. With a .95 probability, determine the margin of error.
  c. What is the 95 confidence interval of the population mean?


Mholman93

  • Sr. Member
  • ****
  • Posts: 328
Reply #1 on: Jun 24, 2018
Answer to Question 1

d

Answer to Question 2

a. 4
b. 7.84
c. 112.16 to 127.84


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

craiczarry

  • Hero Member
  • *****
  • Posts: 527
Reply #2 on: Jun 24, 2018
Correct answers!


Mholman93

  • Sr. Member
  • ****
  • Posts: 328
Reply #3 on: Jun 24, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

The most common childhood diseases include croup, chickenpox, ear infections, flu, pneumonia, ringworm, respiratory syncytial virus, scabies, head lice, and asthma.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Changes in metabolic rate of selected structures in a mammal's body during different activities Changes in metabolic rate of selected structures in a mammal's body during different activities
Selected Miscellaneous Antibacterials Selected Miscellaneous Antibacterials
Selected Hypothalamic and Pituitary Agents Selected Hypothalamic and Pituitary Agents
Selected Adjuncts to Anesthesia Selected Adjuncts to Anesthesia
Standardization of Selected Herbal Products Standardization of Selected Herbal Products
Calories in Selected Alcoholic Drinks Calories in Selected Alcoholic Drinks
Video: Acid-base imbalances - respiratory acidosis and alkalosis

For a complete list of videos, visit our video library