1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
shusha [124]
3 years ago
7

The Aluminum Association reports that the average American uses 56.8 pounds of aluminum in a year. A random sample of 51 househo

lds is monitored for one year to determine aluminum usage. If the population standard deviation of annual usage is 12.2 pounds, what is the probability that the sample mean will be each of the following? Appendix A Statistical Tables a. More than 61 pounds
Mathematics
1 answer:
Vilka [71]3 years ago
6 0

Answer:

0.007

Step-by-step explanation:

We were told in the above question that a random sample of 51 households is monitored for one year to determine aluminum usage

Step 1

We would have to find the sample standard deviation.

We use the formula = σ/√n

σ = 12.2 pounds

n = number of house holds = 51

= 12.2/√51

Sample Standard deviation = 1.7083417025.

Step 2

We find the z score for when the sample mean is more than 61

z-score formula is z = (x-μ)/σ

where:

x = raw score = 61 pounds

μ = the population mean = 56.8 pounds

σ = the sample standard deviation = 1.7083417025

z = (x-μ)/σ

z = (61 - 56.8)/ 1.7083417025

z = 2.45852

Finding the Probability using the z score table

P(z = 2.45852) = 0.99302

P(x>61) = 1 - P(z = 2.45852) = 0.0069755

≈ 0.007

Therefore,the probability that the sample mean will be more than 61 pounds is 0.007

You might be interested in
What is the given function rule f(x)=x^2-5x=1 is the output of f(-3)
Kaylis [27]
The answer ur looking for is 25

5 0
3 years ago
Read 2 more answers
Jenna and her mom are addressing envelopes for Jenna's wedding invitations. So far, Jenna has addressed 2/9 of the envelopes, an
frutty [35]
I can’t tell if you want fraction or decimal so ima say 4/9
5 0
3 years ago
Read 2 more answers
SWAN85 help please please
fenix001 [56]

Answer:

first y=|x+6|

y=2x+7,y=2x-7 parallel lines

Step-by-step explanation:

first y=|x+6|

y=2x+7,y=2x-7 parallel lines

5 0
3 years ago
How do you write 652% as a fraction, mixed number, or whole number?
scoray [572]
652 whole number :)
3 0
2 years ago
The population of pine bluff is 6791 and is decreasing at a rate of 7 per year.Write the linear equation that models this situat
Anna11 [10]

Answer:

y= 6971 -7 x  OR y = -7x + 6971

Step-by-step explanation:

the 6971 is the original number you started with, you are now decreasing by 7, so you use the value of -7. The x is the number of years that pass by, so the variable x affects the number 7 because it says decreases by 7 per year. The x does not go with 6971 as that number doesn't get directly affected.

3 0
3 years ago
Read 2 more answers
Other questions:
  • The average heights of four samples taken from a population of students are shown in the table. Which of these is most likely cl
    5·2 answers
  • Please help a) <br>B) <br>C)
    8·1 answer
  • Find x<br><br> show steps too please<br><br> will give brainliest
    9·1 answer
  • SOMEONE PLEASE HELP ME!!!!! I NEED HELP ON CASE #3
    15·1 answer
  • mike saves 20% of every paycheck.His paycheck last week was $1,500.How much money did mike save from that paycheck?
    14·1 answer
  • Answer two questions about Equations A and B:
    11·2 answers
  • What is slope function
    10·2 answers
  • Describe the pattern in each sequence and determine the next term of the sequence.
    12·1 answer
  • What is 223 divided by 12
    15·2 answers
  • Bridget is tracking the amount of time she works out at the gym each day. The lengths of her
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!