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

Author Question: A population has a mean of 80 and a standard deviation of 7 . A sample of 49 observations will be ... (Read 113 times)

mwit1967

  • Hero Member
  • *****
  • Posts: 501
on: Jun 24, 2018
A population has a mean of 80 and a standard deviation of 7 . A sample of 49 observations will be taken. The probability that the mean from that sample will be larger than 82 is _____.
 a. .5228
  b. .9772
  c. .4772
  d. .0228

Question 2

Ralph's Gas Station is running a giveaway promotion. With every fill-up of gasoline, Ralph gives out a lottery ticket that has a 25 chance of being a winning ticket. Customers who collect 4 winning lottery tickets are eligible for the BIG SPIN for large payoffs. What is the probability of qualifying for the big spin if a customer fills up: (a) 3 times; (b) 4 times; (c) 7 times?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

moormoney

  • Sr. Member
  • ****
  • Posts: 326
Reply #1 on: Jun 24, 2018
Answer to Question 1

d

Answer to Question 2

a . 0
b. .0039
c. .0705


mwit1967

  • Member
  • Posts: 501
Reply 2 on: Jun 24, 2018
Wow, this really help

bigsis44

  • Member
  • Posts: 317
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

Did you know?

The human body produces and destroys 15 million blood cells every second.

Did you know?

To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

Did you know?

The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

Did you know?

In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

Abiotic factors influence population densities. Abiotic factors influence population densities.
Sample communication analysis Sample communication analysis
A medical assistant holds a specimen container to receive a biopsy sample. A medical assistant holds a specimen container to receive a biopsy sample.
Population Growth and Mobility Population Growth and Mobility
Population Indicators Population Indicators
Find a quadractic equation that models the data in standard form Find a quadractic equation that models the data in standard form
Video: Cerebral Cortex Animation

For a complete list of videos, visit our video library