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
Gennadij [26K]
3 years ago
9

Suppose we take a random sample of 41 state college students. Then we measure the length of their right foot in centimeters. We

compute a 95% confidence interval for the mean foot length for students at this college. We get (21.71, 25.09). Suppose that we now compute a 90% confidence interval. As confidence level decreases, the interval width .
Mathematics
1 answer:
mel-nik [20]3 years ago
3 0

Answer:

As confidence level decreases, the interval width decreases too.

Step-by-step explanation:

The confidence interval is an interval in which is probable that the true value of an unknown variable is contained. The confidence level is the probability that this true value is within the limits of the interval.

The degree of confidence or confidence level is defined and affects the width of the confidence interval.

If the true value of the mean foot length is within 21.71 and 25.09 with a 95% confidence level, if we decrease the confidence level to 90%, we expect to have an interval with smaller width.

When we increase the confidence level, we expect to be more sure about the true value being contained in the interval. As we do not count with new information, the only way to be more sure is to have a wider interval.

If the confidence level decreases, we can have a narrower confidence interval as we are not so severe with the probability of containing the true level.

You might be interested in
Jane works twice as fast as her daughter Anna. If it takes 15 minutes to clean the kitchen together, how long would it take Anna
Sonbull [250]
Here, Twice fast means, she takes half time in doing same amount of work.
Let, Anna takes = 2t & Jane takes = t

It would be: 1/t + 1/2t = 1/15
2t + t / 2t² = 1/15
15(3t) = 2t²
2t² = 45t
Divide both sides by t, 
2t = 45
t = 45/2
t = 22.5
& 2t = 22.5(2) = 45

In short, Anna would take 45  minutes

Hope this helps!
7 0
3 years ago
What does 7(p + q +9) equal​
Montano1993 [528]
Answer:
7p+7q+63

Step by step:
Distribute 7 to p, q and 9
5 0
3 years ago
P(x)=5x^2-3x+7(x=1)<br> Pls
kramer

Answer:

9

Step-by-step explanation:

Given

p(x) = 5x² - 3x + 7 ← substitute x = 1

p(1) = 5(1)² - 3(1) + 7 = 5(1) - 3(1) + 7 = 5 - 3 + 7 = 9

4 0
3 years ago
You are to construct an open rectangular box with a square base and a volume of 48 ft^3. If material for the bottom costs $6/ft^
Paha777 [63]
I think it is 5/12 I don’t know that
7 0
3 years ago
Tammy's allowance is $5.00. She did extra chores around the house and earned an
ikadub [295]

Answer:

5.50 this should help :p

8 0
3 years ago
Read 2 more answers
Other questions:
  • Fiona has a job at a garage.
    5·1 answer
  • Is 0.0009999 closer to 0 or 1
    12·2 answers
  • What are the expressions equal too 0.09x0.4
    8·2 answers
  • Factor completely. 4x^2-2x-12
    9·1 answer
  • What is this: 2(0.5x−3)=0<br><br> ?
    10·2 answers
  • Geometry please help!:(
    9·1 answer
  • Someone please help me ASAP!!
    14·1 answer
  • In ΔDEF, the measure of ∠F=90°, DE = 52 feet, and FD = 14 feet. Find the measure of ∠D to the nearest degree
    12·1 answer
  • Which of the following graphs represent a function? Graph A Graph B Graph Graphc Graph A and Graph C.​
    10·1 answer
  • Tori spends equal amounts of time on homework from each of her subjects. She spends 1 hour altogether on her homework each night
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!