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
dusya [7]
3 years ago
5

20. What do you think would happen to the variability (standard deviation) of the distribution of sample proportions if the samp

le size for each sample was 200 instead of 80? Explain.
Mathematics
1 answer:
Naya [18.7K]3 years ago
4 0

Answer:

Step-by-step explanation:

Sample proportion p is the proportion of favourable numbers to total number in the sample

By central limit theorem and also approximation of binomial to normal , we have sample proportion for large number of samples will be normal

with mean = sample proportion

and std deviation = \sqrt{\frac{pq}{n} }

Thus we find standard deviation of proportion sample is inversely proportional to the square of the sample size n.

It follows automatically that as sample size increases std deviation decreases.

Here from 80 sample size was made to 200

So std deviation would decrease automatically

You might be interested in
when a relation is drawn on an xy-plane what is another name for the set of all x values from its graph?
Galina-37 [17]

Another name for the set of all x-values for a relation is: domain.

<h3>What is the Domain of a Relation?</h3>

The domain of a relation can be defined as all the x-values that corresponds to the y-values that are plotted on a graph.

They are referred to as the input or the domain of the relation. Therefore, another name for the set of all x-values plotted for a relation on a graph is: domain.

Learn more about domain on:

brainly.com/question/26098895

#SPJ1

7 0
1 year ago
elise takes 12 minutes to rake up and bag a pile of leaves her sister katherine takes twice as long, how many minutes would it t
Ymorist [56]

Answer:

80 minutes

Step-by-step explanation:

Rate and Time are inverses of each other

First,

Elise Time = 12

and

Katherine Time = 2 * 12 = 24

Their rates would be (inverses):

Elise Rate = 1/12

Katherine Rate = 1/24

Together their rate is 1/12 + 1/24 = 3/24

Now, the inverse of this rate would be the time it takes to complete 1 bag together, that is:

(3/24) ^ -1 = 24/3 = 8 minutes

So, 10 bags would take them:

8 * 10 = 80 minutes

8 0
3 years ago
Can someone please help me im being timed ‼️
Ad libitum [116K]
125 because it’s symmetrical between both
3 0
2 years ago
Read 2 more answers
While checking the balance of your bank account, you must record a
satela [25.4K]

Answer:

Step-by-step explanation:

22

7 0
3 years ago
Read 2 more answers
Determine the point estimate of the population proportion and the margin of error for the following confidence interval.Lower bo
Kamila [148]

Answer: The point estimate of the population proportion is . 485.​

The margin of error is 0.273.​

Step-by-step explanation:

Confidence interval for population proportion(p):

sample proportion ± Margin of error

Given:  Lower bound of confidence interval  = 0.212

Upper bound = 0.758

⇒sample proportion - Margin of error=0.212  (i)

sample proportion + Margin of error= 0.758  (ii)

Adding (i) and (ii) , we get

2(sample proportion) =0.970

⇒ sample proportion = 0.970÷2= 0.485

Since sample proportion is the point estimate of the population proportion.

So, the point estimate of the population proportion=  0.485

Now put sample proportion =0.485 in (ii), we get

0.485+ Margin of error= 0.758

⇒  Margin of error= 0.758 - 0.485 =0.273

i.e. The margin of error is 0.273.​

5 0
3 years ago
Other questions:
  • PLEASE PLEASE HELP
    15·2 answers
  • Please help me with this question
    9·1 answer
  • Compute the scale factor of the new scale drawing (SD2) to the first scale drawing (SD1) using the information from the given sc
    5·1 answer
  • Is 7/8x proportional or non proportional
    11·1 answer
  • Naeem needs 1/4 cup of milk to make a carrot cake. He also needs 1/8 cup of milk to make the icing for the cake. What fraction o
    8·1 answer
  • Find the sum.<br> io +<br> 10<br> 5
    13·1 answer
  • Simplify the following, leaving your answer in index form- attached document.
    9·1 answer
  • Help meh pls 【=◈︿◈=】 What division problem does this area model represent?
    10·1 answer
  • 49 ÷ 7 =
    8·2 answers
  • At 3 P.M., the temperature is 12°F. It then began dropping 2°F every hour for 7 hours. What was the temperature after 7 hours?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!