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

Author Question: Most problems involving normally distributed variables are one of two types.Type A: Find a ... (Read 74 times)

asmith134

  • Hero Member
  • *****
  • Posts: 576
on: Apr 7, 2020

Question 1

True or false, areas under the standard normal curve cannot be negative, whereas z-scores can be positive or negative.
◦ True
◦ False

Question 2

Most problems involving normally distributed variables are one of two types.

Type A: Find a probability or percentage, e.g. find the probability that X lies in a specified range.

Type B: Find the observation corresponding to a given probability or percentage.

Suppose that scores on a test are normally distributed with a mean of 80 and a standard deviation of 8. Which of the following questions below are of type B?

a. Find the 80th percentile.
b. Find the cutoff for the A grade if the top 10% get an A.
c. Find the percentage scoring more than 90.
d. Find the score that separates the bottom 30% from the top 70%.
e. Find the probability that a randomly selected student will score more than 80.

◦ a, b, c, d
◦ c, e
◦ b, d
◦ a, b, d
Introductory Statistics ¦ Weiss ¦ 10th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by asmith134 on Apr 7, 2020

johnharpe

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Apr 7, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 64% of students answer this correctly


asmith134

  • Member
  • Posts: 576
Reply 2 on: Apr 7, 2020
Excellent

tkempin

  • Member
  • Posts: 332
Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

« previous next »
 

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

Did you know?

Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.

An example of a medical history sheet to list patient problems. An example of a medical history sheet to list patient problems.
Types of uterine fibroids. Types of uterine fibroids.
Various types of cells within the human body. Various types of cells within the human body.
Blood types and results of donor and recipient combinations. Blood types and results of donor and recipient combinations.
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
Types of Volcanoes Types of Volcanoes
Video: Glycolysis - Introduction to ATP and the burning of sugar

For a complete list of videos, visit our video library