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

Author Question: Which of the following statements about a discrete random variable and its probability distribution ... (Read 133 times)

jace

  • Hero Member
  • *****
  • Posts: 541
on: Jun 24, 2018
Which of the following statements about a discrete random variable and its probability distribution is true?
 a. Values of the random variable can never be negative.
  b. Negative values of f(x) are allowed if f(x) = 1.
  c. Values of f(x) must be greater than or equal to zero.
  d. The values of f(x) increase to a maximum point and then decrease.

Question 2

Some people who bought X-Game gaming systems complained about having received defective systems. The industry standard for such gaming systems has been 98 non-defective systems. In a sample of 120 units sold, 6 units were defective.
 a. Compute the proportion of defective items in the sample.
  b. Compute the standard error of .
  c. At a 5 level of significance using the critical value approach, test to see if the percentage of defective systems produced by X-Game has exceeded the industry standard.
  d. Show that the p-value approach results in the same conclusion as that of part b.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

fdliggud

  • Sr. Member
  • ****
  • Posts: 366
Reply #1 on: Jun 24, 2018
Answer to Question 1

c

Answer to Question 2

a. .05
b. .0128
c. Test statistic z = 2.35 > 1.645; reject H0; the number of defects has exceeded the industry standard.
d. p-value (.0094) < .05; reject H0.


jace

  • Member
  • Posts: 541
Reply 2 on: Jun 24, 2018
Excellent

bimper21

  • Member
  • Posts: 309
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.

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?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

Schematic representations of (a) random, (b) alternating, (c) block, and (d) graft copolymers. Schematic representations of (a) random, (b) alternating, (c) block, and (d) graft copolymers.
A weather map depicting the sea-level pressure distribution for March 4, 1994. A weather map depicting the sea-level pressure distribution for March 4, 1994.
Discrete lesions Discrete lesions
Blood Distribution Blood Distribution
Summary of Single Variable Discrete Models Summary of Single Variable Discrete Models
Distribution of coral reefs Distribution of coral reefs
Video: How does an animal choose what food to eat?

For a complete list of videos, visit our video library