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
dybincka [34]
2 years ago
11

A research team conducted a critical study, and using the data they gathered in their random experiment, a 95% confidence interv

al for the population mean was constructed. The team was not happy with the result because they felt the margin of error was much too large. All other things being equal, if they were to repeat the study, what could they do to reduce the margin of error
Mathematics
1 answer:
jeyben [28]2 years ago
6 0

Answer:

Increasing sample size (n), decreasing the standard deviation or decreasing the confidence level will reduce the margin of error.

Step-by-step explanation:

The (1 - <em>α</em>)% confidence interval for population mean <em>μ</em> is:

CI=\bar x\pm CV\times \frac{SD}{\sqrt{n}}

The margin of error for this interval is:

MOE=CV\times \frac{SD}{\sqrt{n}}

So, the factors affecting the margin of error are:

  • Confidence level
  • Standard deviation
  • Sample size

It is provided that the team was not happy with the result of the 95% confidence interval constructed, because they felt the margin of error was much too large.

To reduce the margin of error:

  • Increase the sample size.

Since the sample is inversely proportional to the margin of error, increasing the value of <em>n</em> will decrease the MOE.

  • Decrease the standard deviation.

The standard deviation is directly proportional to the margin of error. On decreasing the standard deviation value the MOE of the interval will also decrease.

  • Decrease the confidence level.

The critical value of the distribution is based on the confidence level. Higher the confidence level, higher will be critical value.

So, on deceasing the confidence level the critical value will decrease, hence decreasing the margin of error.

You might be interested in
Find -3/7 divided by -15/1
posledela

Answer:

1/35

Step-by-step explanation:

-3/7 / -15/1 =

3/7 * 1/15 =

3 / 105 =

1/35

6 0
3 years ago
PLEASE HELP. THANK YOU :))))))))))))))))))))))))))))))
GalinKa [24]
The 2 fractions are the possibilities
5 0
2 years ago
Read 2 more answers
What is the value of x?<br><br><br><br> Enter your answer in the box.
pshichka [43]
Hello!

The sum of all angle measures in a heptagon in 900°. We will subtract all of these angles from 900 to find our answer.

900-146-122-142-140-110-142=98

x=98°

I hope this helps!
4 0
2 years ago
Read 2 more answers
Three friends were born in consecutive years. The some of their birth years is 5982.find the year in which each person was born
posledela
A+b+c=5982
find the average of the three friends 
5982/3=1994
add and subtract one to find the average 
1994+1=1995
1994-1=1993
add all the years together to check 
1993+1994+1995=5983
3 0
3 years ago
During a visit to a primary care physician's office, the probability of having neither lab work nor referral to a specialist is
Verdich [7]

Answer:

Mommy

Step-by-step explanation:

mommy mommy mommy mommy mommy

6 0
2 years ago
Read 2 more answers
Other questions:
  • 7 is 30% of what number
    14·1 answer
  • The manufacturerâs suggested retail price (MSRP) of a certain item is $60. Store A sells the item for 20 percent more than the M
    15·1 answer
  • 38. Solve the simultaneous equations<br>3x + 4y = 11, x + 6y = 13.<br>​
    7·2 answers
  • List the exterior angles shown in the figure
    13·1 answer
  • 1.03 – 0.06 <br> subtracting Desimals of Different Lengths 1c
    10·1 answer
  • Helppp pleaseee finals
    7·1 answer
  • 49= how many feet and inches
    5·2 answers
  • Given m<br> n, find the value of x and y.<br> m<br> yo<br> (8x+12)<br> (3x-8)
    11·1 answer
  • 3600−6.3⋅10 2<br> =3600, minus, 6, point, 3, dot, 10, squared, equals
    10·1 answer
  • What is the line of reflection in the figure below? reflection over y axis a. y = x b. x-axis c. y-axis d. origin
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!