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 111 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
Thanks for the timely response, appreciate it

Kedrick2014

  • Member
  • Posts: 359
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

Catbirds and robins reject objects shaped similarly to cowbird eggs no more frequently than objects Catbirds and robins reject objects shaped similarly to cowbird eggs no more frequently than objects
Feral pigs in the United States (here Cape Canaveral, Florida) Feral pigs in the United States (here Cape Canaveral, Florida)
Differentiate each function with respect to x. (Power rule) Differentiate each function with respect to x. (Power rule)
Find derivative using quotient rule Find derivative using quotient rule
Discrete random variables- Probability Distribution Function Discrete random variables- Probability Distribution Function
Survivorship curves for people in the United States in the early 20th and early 21st centuries Survivorship curves for people in the United States in the early 20th and early 21st centuries
Video: Miller's reaction chamber experiment Animation

For a complete list of videos, visit our video library