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

Author Question: A variable is normally distributed with a mean of 100 and a standard deviation of 10. Which is ... (Read 24 times)

Marty

  • Hero Member
  • *****
  • Posts: 553
on: Jul 25, 2018
A variable is normally distributed with a mean of 100 and a standard deviation of 10. Which is larger, the percentage of observations between 80 and 90 or the percentage of observations between 120 and 130? Explain your reasoning.
 
  What will be an ideal response?

Question 2

The scores from a state standardized test have a mean of 80 and a standard deviation of 10. The distribution of the scores is roughly bell shaped. Use the Empirical Rule to find the percentage of scores that lie between 60 and 80.
 
  A) 47.5 B) 34 C) 68 D) 95


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

karlss

  • Sr. Member
  • ****
  • Posts: 321
Reply #1 on: Jul 25, 2018
Answer to Question 1

Answers will vary. Possible answer: The percentage of observations between 80 and 90 is larger. Both intervals have the same length, but the interval (80,

Answer to Question 2

A


Marty

  • Member
  • Posts: 553
Reply 2 on: Jul 25, 2018
Gracias!

ashely1112

  • Member
  • Posts: 347
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

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?

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.

Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Controlled Experiments Manipulate a Variable Controlled Experiments Manipulate a Variable
Negative feedback control of a regulated variable. Negative feedback control of a regulated variable.
How to manually find the mean, variance, and standard deviation for a set of numbers How to manually find the mean, variance, and standard deviation for a set of numbers
How to find the derivative of a function when the base and exponent contain a variable x^x How to find the derivative of a function when the base and exponent contain a variable x^x
How to quickly find the vertex of a quadratic equation that is in standard form How to quickly find the vertex of a quadratic equation that is in standard form
If the random variable x is exponentially distributed with parameter λ = 4, then P(x ≤ ... If the random variable x is exponentially distributed with parameter λ = 4, then P(x ≤ ...
Video: Inflammatory response Animation

For a complete list of videos, visit our video library