« previous next »

Author Question: The standard deviation of a standard normal distribution a. is always equal to zero. b. is always ... (Read 65 times)

olgavictoria

  • Hero Member
  • *****
  • Posts: 528
on: Aug 1, 2018
The standard deviation of a standard normal distribution
 a. is always equal to zero.
  b. is always equal to one.
  c. can be any positive value.
  d. can be any value.

Question 2

Twenty-five percent of the employees of a large company are minorities. A random sample of 7 employees is selected.
 a. What is the probability that the sample contains exactly 4 minorities?
  b. What is the probability that the sample contains fewer than 2 minorities?
  c. What is the probability that the sample contains exactly 1 non-minority?
  d. What is the expected number of minorities in the sample?
  e. What is the variance of the minorities?


izzat

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

b

Answer to Question 2

a . 0.0577
b. 0.4450
c. 0.0013
d. 1.75
e. 1.3125


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Drug abusers experience the following scenario: The pleasure given by their drug (or drugs) of choice is so strong that it is difficult to eradicate even after years of staying away from the substances involved. Certain triggers may cause a drug abuser to relapse. Research shows that long-term drug abuse results in significant changes in brain function that persist long after an individual stops using drugs. It is most important to realize that the same is true of not just illegal substances but alcohol and tobacco as well.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

In inpatient settings, adverse drug events account for an estimated one in three of all hospital adverse events. They affect approximately 2 million hospital stays every year, and prolong hospital stays by between one and five days.

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Comparison of normal-shaped erythro- cytes and the abnormal sickle shape noted in patients with sick Comparison of normal-shaped erythro- cytes and the abnormal sickle shape noted in patients with sick
Cerebral angiography. The four angiograms each reveal the distribution of blood vessels supplying th Cerebral angiography. The four angiograms each reveal the distribution of blood vessels supplying th
Cervical cancer (a) Top view of the uterus showing the presence of a tumor in the wall of the cervix Cervical cancer (a) Top view of the uterus showing the presence of a tumor in the wall of the cervix
Drug A is more potent than Drugs B and C. Drugs A and C have equal efficacy because both drugs have ... Drug A is more potent than Drugs B and C. Drugs A and C have equal efficacy because both drugs have ...
Distribution of the World’s Population Distribution of the World’s Population
Global Distribution of Biomes Global Distribution of Biomes
Video: Cataract

For a complete list of videos, visit our video library