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
Maurinko [17]
3 years ago
7

Shawn would like to know the average height of the trees in the back field at school. She measures the heights of each tree in a

random sample of 20 trees. The mean height of Shawn's sample is 61 inches, and the MAD (mean absolute deviation) is 2 inches.
Mathematics
1 answer:
sammy [17]3 years ago
5 0

Select all that apply

Question options :

The median height of the sample must be between 59 and 63 inches.

Another random sample of 20 trees is likely to have a mean between 57 and 65 inches.

The mean height of these 20 trees is likely to be the same as the mean height of all trees in the back field .

The mean height of these 20 trees is likely to be the same as the mean height of a second random sample of 20 trees.

Shawn would be more likely to get an accurate estimate of the mean height of the population by sampling 40 trees instead of sampling 20 trees.

Answer:

The median height of the sample must be between 59 and 63 inches.

The mean height of these 20 trees is likely to be the same as the mean height of all trees in the back field .

The mean height of these 20 trees is likely to be the same as the mean height of a second random sample of 20 trees.

Shawn would be more likely to get an accurate estimate of the mean height of the population by sampling 40 trees instead of sampling 20 trees

Explanation:

The mean absolute deviation is the summary of absolute deviations from the central point or average of a data set. The central point measurement can be the mean, median or mode of the data set. An average absolute deviation can be used instead of a standard deviation to measure dispersion from central point.

In the above case, a sample is taken of 20 trees and there is a mean absolute deviation of 2, hence, median can be between 59 and 63. Also sample represents population, therefore mean of another sample taken is likely to be same as the previous one taken. Mean invariably gets more accurate as sample size increases too.

You might be interested in
John has a round swimming pool.The distance from the center of the pool to the edge is 3 meters.What is the diameter of John poo
shtirl [24]

Answer:

6 meters

Step-by-step explanation:

Th equation to find the diameter of a circle is,

radius * 2.

The radius of the swimming pool is 3, so 3 * 2 is 6.

Hope this helps!!

Let me know if I'm wrong...

8 0
3 years ago
three-quarters of students are wearing the school's colors. if there are 300 students how many are wearing the colors?
soldi70 [24.7K]

Answer:

225 students are wearing school colors.

Step-by-step explanation:

1. we know that 75% or .75 of the students are wearing school colors.

2. to find what this number is we need to know what 75% of 300 is.

("of" is a keyword meaning multiply)

3. We can do this by multiplying:

300(.75) = 225

4 0
3 years ago
BRAINLIEST!!Felicia had $80 when she went to a music store that charges $18 for each CD. She needs to have no less than $20 in h
xxMikexx [17]

Answer:

The possible number of CDs she could buy is 1, 2, and 3.

Step-by-step explanation:

First, you have to make an equation to solve to find the answer(s):

  • 80 - (18 · x) ≥ 20
  • 80 is how much money Felicia has; 18 is for the cost of each CD; x is for the number of CDs; ≥ is no less; and 20 is how much money Felicia needs to have left.

1.) 80 - (18 · 1) ≥ 20

80 - 18 · 1 ≥ 20

80 - 18 ≥ 20

62 ≥ 20

Since 62 ≥ 20 is always true, there are infinitely many solutions.

2.) 80 - (18 · 2) ≥ 20

80 - 18 · 2 ≥ 20

80 - 36 ≥ 20

44 ≥ 20

Since 44 ≥ 20 is always true, there are infinitely many solutions.

3.) 80 - (18 · 3) ≥ 20

80 - 18 · 3 ≥ 20

80 - 54 ≥ 20

26 ≥ 20

Since 26 ≥ 20 is always true, there are infinitely many solutions.

4.) 80 - (18 · 4) ≥ 20

80 - 18 · 4 ≥ 20

80 - 72 ≥ 20

8 ≥ 20

Since 8 ≥ 20 is false, there is no solution.

5.) 80 - (18 · 5) ≥ 20

80 - 18 · 5 ≥ 20

80 - 90 ≥ 20

- 10 ≥ 20

Since - 10 ≥ 20 is false, there is no solution.

4 0
3 years ago
Read 2 more answers
If I equals √-1 what is the value of I³
ziro4ka [17]

Answer:

-I

Step-by-step explanation:

Given :

I= \sqrt{-1}

Now

I^{2} =-1

And I^{3} =-i

Answer will be -I

8 0
2 years ago
Write an expression using exponents that is equivalent to 100,000
MrMuchimi
10^5 is equivalent to 100,000. I hope this answers your question and I hope you have a great day ! :)
6 0
2 years ago
Other questions:
  • Two angles are supplementary. Three times the measure of one angle is 20° more than the measure
    9·1 answer
  • Which of the following describes a situation in which the total distance a car travels is 0 meters from its starting point?
    7·2 answers
  • Four friends all use $10 off coupons to buy themselves concert tickets.
    10·1 answer
  • Two random samples were drawn from two employers to obtain information about hourly wages. Use the following information and the
    15·1 answer
  • HELP ASAP PLEASE<br> How many students were in the sample?<br> a. 29<br> b. 5<br> c. 24<br> d. 20
    11·2 answers
  • Can a denominator be negative in rational number?
    13·2 answers
  • Please help I have (5 days left)
    11·1 answer
  • Need help answering these questions
    5·1 answer
  • Using long division to show the fraction and decimal in each pair are equal 3/4 and 0.75
    7·1 answer
  • 4x−19=−3x−12<br> What is the value of x?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!