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
grin007 [14]
2 years ago
12

What sample size should be used if we would like to estimate the mean age of the college students at a particular campus with 95

% confidence? We would like to be accurate to within three years, and we will assume the population is normally distributed with a standard deviation of 5.1 years.
Mathematics
1 answer:
nevsk [136]2 years ago
3 0

Answer: 12

Step-by-step explanation:

The formula to find the sample size is given by:-

n=(\dfrac{z_c\cdot \sigma}{E})^2 , where \sigma is the population standard deviation, z_c is the z-value for the (1-\alpha) confidence interval and E is the margin of error .

As per given , we have

Population standard deviation : \sigma=5.1

z-value for 95% confidence interval : z_c=1.960

Margin of error : E= 3

Then, the required minimum sample :-

n=(\dfrac{(1.96)\cdot (5.1)}{3})^2\\\\\Rightarrow\ n=(3.332)^2=11.102224\approx12

Hence, the required minimum sample size = 12

You might be interested in
Which transformation preserves only angle measurement? A)dilation B)rotation C)reflection D)translation
pishuonlain [190]

Answer:

A)dilation

Step-by-step explanation:

The transformation preserves only angle measurement is dilation. The  transformation helps in taking up the production of an image that is of the same shape as the main original image.

8 0
3 years ago
Read 2 more answers
A set of data points has a line of best fit of y = –0.2x + 1.9. What is the residual for the point (5, 1)?
alisha [4.7K]
<span>A. 0.1
    The residual is the difference between the observed value and the predicted value for a data point. You obtain it by subtracting the predicted value from the observed value. So the predicted value is: y = -0.2x + 1.9 y = -0.2*5 + 1.9 y = -1 + 1.9 y = 0.9 Therefore the residual is: r = 1 - 0.9 r = 0.1 And the value of 0.1 matches option "A".</span>
3 0
3 years ago
PLEASE HELP AND I NEED STEP BY STEP EXPLNATION
natulia [17]
The answer would be 12 feet square.

That’s because taking out the square is taking out an area of 4 feet square. If you substitute the 4 feet square back in, that would fill in the empty spot marked with the 2 feet by 2 feet dimensions. Then, you could treat it like a rectangle of 4 by 3. If you multiply them you’ll get 12 feet square which is your answer. Hope this helps
3 0
2 years ago
If a cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between them?
Alex777 [14]

Answer:

The answer is B (From the cup to the hand)

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
How to factor 18a2+6a5-8a3
Zielflug [23.3K]

Answer:

2a^2(3a^3-4a+9)

Step-by-step explanation:

You could change the equation to this: 6a^3a^2-8a^1a^2+18a^2

*This is the exact same as 18a^2+6a^5-8a^3

You can continue to break this down until you get:

2*3a^3a^2-2*4a^1a^2+2*9a^2

*This too = 18a^2+6a^5-8a^3

With this new equation, you can cancel out the common term: 2a^2

You come up with my answer.

<em>Hope this helps!!</em>


7 0
3 years ago
Other questions:
  • Find the reciprocals of the following numbers: 8, 2/7 , 1 1/5 , 0.3.
    12·1 answer
  • What is -5a + 3b + 8a
    5·1 answer
  • Express this number in scientific notation.
    9·1 answer
  • What is the value of 1 in 0.01?
    7·1 answer
  • Y=-1 <br> Y=2x-7 hsbdhdhhdhdjdjdjfjjfjfjffj
    6·1 answer
  • The radius of a circle with area A is approximately √A/3. The area of a circular mouse pad is 54 square inches. Estimate its rad
    5·1 answer
  • PLSSS HELPPPP I WILLL GIVE YOU BRAINLIEST!!!!!!
    12·1 answer
  • Write an equation that you could use to calculate the distance from NIGEL's feet to the balloon. Let x represent the unknown dis
    15·2 answers
  • Write a number in which the value of the 8 is ten times greater than the value of the 8 in 8,304
    6·1 answer
  • Which angels are vertical angels?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!