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

Author Question: X is a random variable with the probability function: f(x) = x/6 for x = 1, 2, or 3 . The expected ... (Read 151 times)

lracut11

  • Hero Member
  • *****
  • Posts: 536
on: Jun 24, 2018
x is a random variable with the probability function: f(x) = x/6 for x = 1, 2, or 3 . The expected value of x is _____.
 a. 0.333
  b. 0.500
  c. 2.000
  d. 2.333

Question 2

A student believes that no more than 20 (i.e., 20) of the students who finish a statistics course get an A. A random sample of 100 students was taken. Twenty-four percent of the students in the sample received 'A's.
 a. State the null and alternative hypotheses.
  b. Using the critical value approach, test the hypotheses at the 1 level of significance.
  c. Using the p-value approach, test the hypotheses at the 1 level of significance.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

AngeliqueG

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Jun 24, 2018
Answer to Question 1

d

Answer to Question 2

a. H0: p  .2
Ha: p > .2
b. Do not reject H0; test statistic z = 1 < 2.33
c. Do not reject H0; p-value = .1587 > .01


lracut11

  • Member
  • Posts: 536
Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

marict

  • Member
  • Posts: 304
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

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).

Did you know?

Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

Oxytocin is recommended only for pregnancies that have a medical reason for inducing labor (such as eclampsia) and is not recommended for elective procedures or for making the birthing process more convenient.

How to vertically stretch and compress a sinusoidal function (y=a*sin⁡b(x−c)+d) How to vertically stretch and compress a sinusoidal function (y=a*sin⁡b(x−c)+d)
How to combine and sketch transformations of a sinusoidal function (Question 2) (y=a*sin⁡b(x−c)+d) How to combine and sketch transformations of a sinusoidal function (Question 2) (y=a*sin⁡b(x−c)+d)
How B Vitamins Function as Coenzymes How B Vitamins Function as Coenzymes
State the transformations on the function f(x)= 4sin(x-pi)-2 and then graph two cycles below. State the transformations on the function f(x)= 4sin(x-pi)-2 and then graph two cycles below.
Differentiation of Inverse Trigonometric Function Differentiation of Inverse Trigonometric Function
Creating a loss-of-function CFTR Creating a loss-of-function CFTR
Video: Methods that regulate pH

For a complete list of videos, visit our video library