« previous next »

Author Question: The average natural gas bill for a random sample of 21 homes in the 19808 zip code during the month ... (Read 42 times)

Pineappleeh

  • Hero Member
  • *****
  • Posts: 585
on: Jun 24, 2018
The average natural gas bill for a random sample of 21 homes in the 19808 zip code during the month of March was 311.90 with a sample standard deviation of 51.60. The 90 confidence interval around this sample mean is ________.
 
  A) (292.46, 331.34)
  B) (285.98, 337.82)
  C) (278.09, 345.71)
  D) (266.82, 356.98)

Question 2

A recent study reported that 73 of Americans could only converse in one language. A random sample of 130 Americans was randomly selected. What is the probability that 100 or fewer of these Americans could only converse in one language?
 
  A) 0.6389
  B) 0.7510
  C) 0.8413
  D) 0.9245
Business Statistics ¦ Donnelly ¦ 2nd Edition
Buy Test-Bank


yahahah24021

  • Sr. Member
  • ****
  • Posts: 323
Reply #1 on: Jun 24, 2018
Answer to Question 1

A

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

Did you know?

Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Darwin’s finches: Adaptive radiation of bill types. Darwin’s finches: Adaptive radiation of bill types.
Sample prescriptions of antibiotics for prophylaxis against infective endocarditis. Sample prescriptions of antibiotics for prophylaxis against infective endocarditis.
Natural plant sources of pharmaceutical Natural plant sources of pharmaceutical
How water is used in homes How water is used in homes
Average Global Temperatures Average Global Temperatures
What is the [OH-] in a seawater sample if the pH is 8.65? What is the [OH-] in a seawater sample if the pH is 8.65?
Video: Atrophy

For a complete list of videos, visit our video library