« previous next »

Author Question: The average price of cell phones manufactured by Ahmadi, Inc is 98 with a standard deviation of 12 . ... (Read 149 times)

Hungry!

  • Hero Member
  • *****
  • Posts: 1,071
on: Jun 24, 2018
The average price of cell phones manufactured by Ahmadi, Inc is 98 with a standard deviation of 12 . Furthermore, it is known that the prices of the cell phones manufactured by Ahmadi are normally distributed.
 a. What percentage of cell phones produced by Ahmadi, Inc. will have prices of at least 120.20?
  b. Cell phones with prices of at least 81.80 will get a free gift. What percentage of the cell phones will be eligible for the free gift?
  c. What are the minimum and the maximum values of the middle 95 of cell phone prices?
  d. If 7,218 of the Ahmadi cell phones were priced at least 119.00, how many cell phones were produced by Ahmadi, Inc.?

Question 2

In a regression analysis, the coefficient of determination is .4225 . The coefficient of correlation in this situation is
 a. .65 if b1 is positive.
  b. .1785.
  c. -.18 if b1 is negative.
  d. .4225.


yahahah24021

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

a. 3.13
b. 91.15
c. Minimum Price 74.48 Maximum Price 121.52
d. 180,000

Answer to Question 2

a


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

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.

On average, the ratio of carbon to nitrogen is much higher in terrestrial plants than in other major On average, the ratio of carbon to nitrogen is much higher in terrestrial plants than in other major
Plant Cell Plant Cell
The Cell The Cell
Sickle-cell hemoglobin Sickle-cell hemoglobin
Modern Cell Theory Modern Cell Theory
Progressive restriction of cell fate during development in Drosophila Progressive restriction of cell fate during development in Drosophila
Video: Transcription—A molecular view

For a complete list of videos, visit our video library