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
inysia [295]
1 year ago
14

A sample with a mean of m = 40 and a variance of s2 = 20 has an estimated standard error of 1 point. how many scores are in the

sample? group of answer choices 4 5 20 21
Mathematics
1 answer:
tamaranim1 [39]1 year ago
3 0

The correct option is 20.

The score found for the sample is 20.

<h3>What is Standard error?</h3>

A standard error is a statistic that is applied to test the distribution of data. This metric is comparable to standard deviation. We can calculate the standard error if we know the sample size & standard deviation. It assesses the mean's precision.

Now, according to the question;

Sample mean; \bar{x}=40

Sample variance; s^{2}=20

Thus, s=\sqrt{20}=4.47

Standard error SE = 1

The amount of scores with in sample must be determined here.

The standard error formula is as follows:

S E=\frac{s}{\sqrt{n}}

We might rearrange the formula as follows:

\begin{aligned}\sqrt{n} &=\frac{s}{S E} \\n &=\left(\frac{s}{S E}\right)^{2}\end{aligned}

Substituting the values;

\begin{aligned}&n=\left(\frac{4.47}{1}\right)^{2} \\&n=19.98\end{aligned}

The sample's number of scores n = 19.98 = 20 (round up)

Therefore, the scores are in the sample is 20.

To know more about the Standard error, here

brainly.com/question/14467769

#SPJ4

You might be interested in
1.
MatroZZZ [7]

Answer:

97.5 miles

Step-by-step explanation:

d = 65t

where d is the distance in miles and t is the time in hours

Therefore, to calculate how many miles the car travels in 1.5 hours, substitute t = 1.5 into the equation:

d = 65 x 1.5 = 97.5 miles

5 0
2 years ago
The two right triangular prisms are similar solids.
Zanzabum

Answer:

<h2>The volume of the larger prims is eight times greater than the smaller prism.</h2>

Step-by-step explanation:

If the scale factor of the larger prims to the smaller prism is 3, that means each side is triple.

We know the a triangular prims has a volume defined by

V_{small} =\frac{b \times h_{1} }{2} \times h_{2}

If we take that formula as the smaller prism, then the larer prism has a volum of

V_{large} =\frac{2b \times 2h_{1} }{2} \times 2h_{2}=8(\frac{b \times h_{1} \times h_{2}  }{2} )

If we compare, we can deduct that

V_{large}=8V_{small}

In words, the volume of the larger prims is eight times greater than the smaller prism.

4 0
3 years ago
Read 2 more answers
Please help me answer the assignment in the picture.
Arturiano [62]

Mean: 52.2 because its the average of all the numbers

Range: 2   because (60-58)

Median: 53 because its in the middle of all the numbers

Mode : None

   

6 0
3 years ago
What is the result when the number 86 is decreased by 9%?
Vikki [24]
78.26

Hope this helps!!!
6 0
3 years ago
If 2(x + 3) + 7x = 3(x - 2) - 9, then x = ?
Fudgin [204]

Answer:

x=− 7 over 2 =−3.500

Hope this helps!

5 0
3 years ago
Read 2 more answers
Other questions:
  • if one inch represents 12 feet ,what dimentions whould you use to make a scale drawinng of a building 75 feet by 80 feet?
    15·1 answer
  • Simplify the expression. <br> -4 + 6 • (-1) <br> A. -10 <br> B. -2 <br> C. 2 <br> D. 10
    10·1 answer
  • Rectangle PQRS has vertices at P(-3, 5), Q(8, 5), R(8, 0) and S. The coordinates of point S are A) (5, 8) B) (0, 8) C) (-3, 0) E
    13·1 answer
  • If x can be any integer, what is the greatest possible value of the expression 1-x^2
    15·1 answer
  • What is the equivalent of 7(7q+5)
    8·1 answer
  • At a local high school, 30% of the students are on a school sports team, 25% take at least one Advanced Placement (AP) class, an
    5·1 answer
  • ​A plant grew from 12 inches to 18 inches in height. What was the percent of increase in the tree’s height?
    7·1 answer
  • Sarah bought a new T-shirt for $40. The sale tax is 4%. How much was the tax?
    11·2 answers
  • The data set shows the numbers of yogurt pretzels in various bags.
    6·1 answer
  • The volume of this rectangular prism is 112 cubic centimeters. What is the value of y?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!