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

Author Question: The empirical rule states that, for data having a bell-shaped distribution, the portion of data ... (Read 120 times)

j.rubin

  • Hero Member
  • *****
  • Posts: 557
on: Jun 24, 2018
The empirical rule states that, for data having a bell-shaped distribution, the portion of data values being within one standard deviation of the mean is approximately _____.
 a. 33
  b. 50
  c. 68
  d. 95

Question 2

A bank has kept records of the checking balances of its customers and determined that the average daily balance of its customers is 300 with a standard deviation of 48 . A random sample of 144 checking accounts is selected.
 a. What is the probability that the sample mean will be more than 306.60?
  b. What is the probability that the sample mean will be less than 308?
  c. What is the probability that the sample mean will be between 302 and 308?
  d. What is the probability that the sample mean will be at least 296?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

softEldritch

  • Sr. Member
  • ****
  • Posts: 334
Reply #1 on: Jun 24, 2018
Answer to Question 1

c

Answer to Question 2

a. 0.0495
b. 0.9772
c. 0.2857
d. 0.8413


j.rubin

  • Member
  • Posts: 557
Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

essyface1

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

Chargaff's Rule Chargaff's Rule
A health history is essential in collecting subjective data about metabolic acidosis. A health history is essential in collecting subjective data about metabolic acidosis.
Japanese farmers create pentagon-shaped oranges Japanese farmers create pentagon-shaped oranges
Global Distribution of Earthquakes Global Distribution of Earthquakes
The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ... The time at which the mailman delivers the mail to Ace Bike Shop follows a normal distribution ...
Trapezoidal rule (approximation with two rectangles) Trapezoidal rule (approximation with two rectangles)
Video: Neuron Type Animation

For a complete list of videos, visit our video library