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 92 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
:D TYSM

kalskdjl1212

  • Member
  • Posts: 353
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

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?

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?

Children with strabismus (crossed eyes) can be treated. They are not able to outgrow this condition on their own, but with help, it can be more easily corrected at a younger age. It is important for infants to have eye examinations as early as possible in their development and then another at age 2 years.

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Biotic interactions within and among three Aspen Parkland community types, drawn by Bird Biotic interactions within and among three Aspen Parkland community types, drawn by Bird
Different types of fog found throughout the United States Different types of fog found throughout the United States
How to find the resultant vector of two vectors separated by a known angle How to find the resultant vector of two vectors separated by a known angle
Types of Fold Strata Types of Fold Strata
Types of Long-Term Memories Types of Long-Term Memories
Find the proceeds of the following promissory note. A five-year, $4500.00 note bearing interest ... Find the proceeds of the following promissory note. A five-year, $4500.00 note bearing interest ...
Video: Interview with Person having Obsessive Compulsive Disorder

For a complete list of videos, visit our video library