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
prohojiy [21]
3 years ago
8

A 95% confidence is given by (15,20) . The interval is based on a sample of size n=25 .

Mathematics
1 answer:
love history [14]3 years ago
5 0

Answer:

b. quadruple the sample size.

Step-by-step explanation:

Given that a 95% confidence is given by (15,20) .

this implies that mean = average of lower and higher bounds of confidence interval = \frac{15+20}{2} =17.5

Margin of error = Upper bound - Mean = 20-17.5 = 2.5

Confidence level = 95%

Critical value = 1.96

Std  error = \frac{2.5}{1.96} =1.27551

Std devition = Std error * sqrt n = 6.3775

If we want to reduce margin of error by half we must get margin of error as 1.25

For that std error for same critical value = 0.63775

Std deviation did not change

So sample size only changed which implies that sample size is 4 times the original

b. quadruple the sample size.

You might be interested in
Product A is a 8oz bottle of cough medicine that sells for $1.36. Product B is a 16oz bottle of medicine that costs 3.20 which p
Sauron [17]

Product A= 8oz = 1.36 x 2= 2.72. 16oz = 2.72

product B= 16oz= 3.20

so Product A has the lower unit price.

5 0
3 years ago
Which is the graph of y = – 3?
KATRIN_1 [288]

Answer:

this should be the graph.

Step-by-step explanation:

I hope this helps.

5 0
2 years ago
Read 2 more answers
6,500 acres of a 41,000 acre forest burned in a fire. what percentage of forest was damaged?​
Tems11 [23]

Answer:

15.85%

Step-by-step explanation:

Given:

Acres damaged (burned) = 6,500 acres

Acres in total forest = 41,000 acres

Hence the amount of damaged forest as a fraction of the total forest,

= \frac{6500}{41000} = \frac{13}{82}

expressed as percentage = \frac{13}{82} x 100% = 15.85%

8 0
2 years ago
ASAP Evaluate x -2 for x = -3.<br> Please answer it in a fraction
Sphinxa [80]

Answer:

It is 2/3

Step-by-step explanation:

7 0
3 years ago
What is (f–g)(x)?<br><br>f(x) = -3x2<br><br>g(x) = -3x2+9x
s2008m [1.1K]

Answer:

what is it asking???? it doesn't make sense

8 0
3 years ago
Other questions:
  • Help me please :33 :ppp
    6·1 answer
  • Nine less than the product of 2 and number is equal to 7​
    13·2 answers
  • debbie rode her bicycle 12 miles every day for 5 months. there were 153 days in these 5 months how many miles did she ride​
    8·1 answer
  • What is the exact circumference of the circle?
    6·1 answer
  • Wade borrowed $12,500 from his uncle at 4.5% simple interest to use for travel and repaid the loan in 4 years. How much did he p
    7·1 answer
  • 3. What is the solution to the system of equations?
    7·1 answer
  • Question 6 of 10
    7·1 answer
  • Please help . Put step by step workings please. Also I need help with both questions
    8·1 answer
  • Pls help ple help pls help
    8·2 answers
  • A musician
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!