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

Author Question: The average weekly earnings of bus drivers in a city are 950 (that is ) with a standard deviation of ... (Read 130 times)

KWilfred

  • Hero Member
  • *****
  • Posts: 570
on: Jun 24, 2018
The average weekly earnings of bus drivers in a city are 950 (that is ) with a standard deviation of 45 (that is ). Assume that we select a random sample of 81 bus drivers.
 a. Assume the number of bus drivers in the city is large compared to the sample size. Compute the standard error of the mean.
 b. What is the probability that the sample mean will be greater than 960?
  c. If the population of bus drivers consisted of 400 drivers, what would be the standard error of the mean?

Question 2

Which of the following is NOT a characteristic of the normal probability distribution?
 a. The graph of the curve is the shape of a rectangle.
  b. The total area under the curve is always equal to 1.
  c. The random variable assumes a value within plus or minus three standard deviations of its mean 99.72 of the time.
  d. The mean is equal to the median, which is also equal to the mode.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

hugthug12

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. 5
b. .0228
c. 4.47

Answer to Question 2

a


KWilfred

  • Member
  • Posts: 570
Reply 2 on: Jun 24, 2018
Thanks for the timely response, appreciate it

essyface1

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

Carbamazepine can interfere with the results of home pregnancy tests. If you are taking carbamazepine, do not try to test for pregnancy at home.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Did you know?

The cure for trichomoniasis is easy as long as the patient does not drink alcoholic beverages for 24 hours. Just a single dose of medication is needed to rid the body of the disease. However, without proper precautions, an individual may contract the disease repeatedly. In fact, most people develop trichomoniasis again within three months of their last treatment.

Did you know?

The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.

In 1900, Ashcan artist George Luks portrayed corporate monopolies and franchises as a monster preyin In 1900, Ashcan artist George Luks portrayed corporate monopolies and franchises as a monster preyin
a) Thumb pressure with radial deviation b) Alternating stroke using ulnar deviation a) Thumb pressure with radial deviation b) Alternating stroke using ulnar deviation
Working and Living and Playing in the City Dump of Phnom Penh, Cambodia Working and Living and Playing in the City Dump of Phnom Penh, Cambodia
Calculating the Deviation IQ Score Calculating the Deviation IQ Score
Chart showing average yearly dose of radiation from natural and human-made sources Chart showing average yearly dose of radiation from natural and human-made sources
Video: What is Reverse Osmosis?

For a complete list of videos, visit our video library