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
SVEN [57.7K]
3 years ago
6

Suppose the students construct a 95% confidence interval for the true weight of their rocks. Whose interval do you expect to be

more precise (narrower)? (i) The student who weighed the rock 20 times. (ii) The student who weighed the rock 5 times. (iii) Both intervals would be equally precise.
Mathematics
1 answer:
MakcuM [25]3 years ago
7 0

Answer:

(i) The student who weighed the rock 20 times.

Step-by-step explanation:

The margin of error of a confidence interval is:

M = z*\frac{\sigma}{\sqrt{n}}

In which z is related to the confidence level, \sigma is the standard deviation of the population and n is the size of the sample.

From the equation above, the larger the size of the sample, the lower the margin is, that is, the narrower the interval is.

In this question:

A student weighed the rock 20 times and other the 5. From above, the one who weighed the rock 20 times will have the more precise interval.

So the correct answer is:

(i) The student who weighed the rock 20 times.

You might be interested in
Round off 1,563,385 to the nearest million. A. 1,600,000 B. 1,563,400 C. 2,000,000 D. 1,563,000
iren2701 [21]
1,563,385 ...when rounded to the nearest million is 2,000,000.
7 0
3 years ago
Read 2 more answers
Distribute -(-4v+6.3w-9.8)
Firdavs [7]

Answer:

4v-6.3w+9.8

Step-by-step explanation:

If you distribute the negative sign (same as distributing -1), then you get -(-4v) + (-6.3w) - (-(9.8))

Basically it's switching the signs

Hope that helped :)

3 0
3 years ago
(08.06)The following data show the weight, in ounces, of 10 different bags of candy: 10 3 7 3 4 21 6 10 1 2 4 After removing the
hoa [83]

Answer:

B) is correct; on average, each bag of candy has a weight that is 2.6 oz different than the mean weight of 5 oz.

To find the mean absolute deviation, we first find the mean.  Find the sum of the data points and divide by the number of data points (without the outlier, 21, in it):

(10+3+7+3+4+6+10+1+2+4)/10 = 50/10 = 5

Now we find the difference between each data point and the mean, take its absolute value, and find their sum:

|10-5|+|3-5|+|7-5|+|3-5|+|4-5|+|6-5|+|10-5|+|1-5|+|2-5|+|4-5| =

5+2+2+2+1+1+5+4+3+1 = 26

We now divide this by the number of data points:

26/10 = 2.6

This is a measure of how much each bag of candy varies from the mean.

4 0
3 years ago
Read 2 more answers
Which number is not equivalent to others? 0.5 1/5 5/25 20%
CaHeK987 [17]

Answer: .5

Step-by-step explanation:

1/5 = 20%

5/25=20%

.5= 50%

Hope this helps!

6 0
3 years ago
Solve for x by finding the missing side of the triangle. Round your answer to the nearest tenth ​
Alika [10]

Answer:

i thought i had the answer but then i got it wrong im sorry

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Other questions:
  • Please fill in the blanks for problem #10
    11·1 answer
  • Probability is the
    9·1 answer
  • What is 6 to the fith power +78
    15·2 answers
  • Which of the following could not be true for a function?
    15·2 answers
  • An expression that uses variables to state a rule is a ______
    13·2 answers
  • the spice recipe calls for 1/2 tsp of crushed red pepper for every 1 1/4 tsp of black pepper. you use 6 tsp of crushed red peppe
    5·1 answer
  • Jane spent 3 hours exploring a mountain with a dirt bike. First, she rode 48 miles uphill. After she reached the peak she rode f
    6·1 answer
  • Suppose your​ friend's parents invest $15,000 in an account paying 5% compounded annually. What will the balance be after 10 ​ye
    6·1 answer
  • I’ll mark you brainlist
    10·2 answers
  • I need help,<br> Find the perimeter of the rectangle. Write your answer in Scientific Notation
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!