Author Question: For a binomial distribution, if the probability of success is .48 on the first trial, what is the ... (Read 129 times)

TVarnum

  • Hero Member
  • *****
  • Posts: 548
For a binomial distribution, if the probability of success is .48 on the first trial, what is
  the probability of failure on the second trial?
 
  What will be an ideal response?

Question 2

The following data represent the scores of 50 students on a statistics exam. The mean
  score is 80.02, and the standard deviation is 11.9.
 
  39 51 59 63 66 68 68 69 70 71
  71 71 73 74 76 76 76 77 78 79
  79 79 79 80 80 82 83 83 83 85
  85 86 86 88 88 88 88 89 89 89
  90 90 91 91 92 95 96 97 97 98
  What percentage of the scores lies within one standard deviation of the mean? two
  standard deviations of the mean? three standard deviations of the mean? Based on these
  percentages, do you believe that the distribution of scores is mound-shaped and
  symmetric? Explain.



Jmfn03

  • Sr. Member
  • ****
  • Posts: 323
Answer to Question 1

Since the probability of success remains the same from trial to trial, the probability of success on the second trial is
.48, so the probability of failure on the second trial is 1 -.48 = .52.

Answer to Question 2

74 of the scores lie within one standard deviation of the mean, 96 within two standard deviations, and 98
within three standard deviations. These percentages are close to those given in the Empirical Rule, so the
distribution is roughly mound-shaped and symmetric, though obviously skewed slightly to the left.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

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?

The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

For a complete list of videos, visit our video library