This topic contains a solution. Click here to go to the answer

Author Question: Find the z-score for the value 88, when the mean is 70 and the standard deviation is 1. A) z = ... (Read 61 times)

Haya94

  • Hero Member
  • *****
  • Posts: 558
Find the z-score for the value 88, when the mean is 70 and the standard deviation is 1.
 
  A) z = 17.00 B) z = -1.24 C) z = 1.24 D) z = 18.00

Question 2

A recent survey was conducted to compare the cost of solar energy to the cost of gas or
  electric energy.
 
  Results of the survey revealed that the distribution of the amount of the
  monthly utility bill of a 3-bedroom house using gas or electric energy had a mean of
  124.00 and a standard deviation of 15.00. Assuming the distribution is
  mound-shaped and symmetric, would you expect to see a 3-bedroom house using gas
  or electric energy with a monthly utility bill of 236.50 ? Explain.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Tabitha_2016

  • Sr. Member
  • ****
  • Posts: 344
Answer to Question 1

D

Answer to Question 2

The z-score for the value 236.50 is:
z =
x - x
s
=
236.5 - 124
15
= 7.5
An observation that falls 7.5 standard deviations above the mean is very unlikely. We would not expect to see a
monthly utility bill of 236.50 for this home.




Haya94

  • Member
  • Posts: 558
Reply 2 on: Jun 24, 2018
Gracias!


amynguyen1221

  • Member
  • Posts: 355
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

Did you know?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

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?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

For a complete list of videos, visit our video library