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

Author Question: The expected value of a discrete random variable _____. a. is the most likely or highest ... (Read 133 times)

londonang

  • Hero Member
  • *****
  • Posts: 540
on: Jun 24, 2018
The expected value of a discrete random variable _____.
 a. is the most likely or highest probability value for the random variable
  b. will always be one of the values x can take on, although it may not be the highest probability value for the random variable
  c. is the average value for the random variable over many repeats of the experiment
  d. All of the answers are correct.

Question 2

A lathe is set to cut bars of steel into lengths of 6 centimeters. The lathe is considered to be in perfect adjustment if the average length of the bars it cuts is 6 centimeters. A sample of 121 bars is selected randomly and measured. It is determined that the average length of the bars in the sample is 6.08 centimeters with a standard deviation of .44 centimeters.
 a. Formulate the hypotheses to determine whether or not the lathe is in perfect adjustment.
  b. Compute the test statistic.
  c. Using the p-value approach, what is your conclusion? Let  = .05.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

maaaaaaaaaa

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jun 24, 2018
Answer to Question 1

c

Answer to Question 2

a. H0:  = 6 centimeters
Ha:   6 centimeters
b. t = 2
c. p-value (.0456) is between .02 and .05; therefore, reject H0 . The lathe is not in perfect adjustment.


londonang

  • Member
  • Posts: 540
Reply 2 on: Jun 24, 2018
Excellent

debra928

  • Member
  • Posts: 342
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

All adverse reactions are commonly charted in red ink in the patient's record and usually are noted on the front of the chart. Failure to follow correct documentation procedures may result in malpractice lawsuits.

Did you know?

In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.

Did you know?

Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star The reflection nebula NGC 1999 is brilliantly illuminated by V380 Orionis (center), a variable star
Pregnant and Lactating Women, Children, the Ill, and Older Adults Are at the Highest Risk Pregnant and Lactating Women, Children, the Ill, and Older Adults Are at the Highest Risk
Assume z is a standard normal random variable. What is the value of z if the area to the right ... Assume z is a standard normal random variable. What is the value of z if the area to the right ...
Variable expression of yellow phenotype in mice caused by diet-related epigenetic changes in the gen Variable expression of yellow phenotype in mice caused by diet-related epigenetic changes in the gen
Random distribution of dandelions Random distribution of dandelions
Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia). Type III curve. Mortality is highest early in life. Data for a desert shrub (Cleome droserifolia).
Video: Multiple Sclerosis Animation

For a complete list of videos, visit our video library