A population has a mean of = 30. If 3 points are added to each score, what is the mean for the new ...

Author Question: A population has a mean of = 30. If 3 points are added to each score, what is the mean for the new ... (Read 75 times)

stephzh

Hero Member
Posts: 556

on: Jun 20, 2018

A population has a mean of = 30. If 3 points are added to each score, what is the mean for the new distribution?

A) 3
B) 27
C) 30
D) 33

Question 2

After every score in a sample is multiplied by 3, the mean is calculated and found to be M = 21. What was the mean for the original scores?

A) 7
B) 3
C) 21
D) 63

wshriver

Sr. Member
Posts: 318

Reply #1 on: Jun 20, 2018

Answer to Question 1

D

Answer to Question 2

A

Need homework help now?

Ask unlimited questions for free

Ask a Question

« previous next »

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

In the United States, congenital cytomegalovirus causes one child to become disabled almost every hour. CMV is the leading preventable viral cause of development disability in newborns. These disabilities include hearing or vision loss, and cerebral palsy.

Did you know?

There are approximately 3 million unintended pregnancies in the United States each year.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.