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
A . What is the slope in the line of the graph ?
vampirchik [111]

Answer:

0.2x+3

Step-by-step explanation:

5 0
3 years ago
P squared minus 4P minus 32 divided by p + 4
SSSSS [86.1K]

Answer:

X-8

Im not 100% sure but i think that is the answe

3 0
3 years ago
A= 27 +0.30
Tomtit [17]

Answer: ...

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Find the height of a cuboid whose volume is 540 cu.cm and base area is 90 sq.cm .
EastWind [94]

Answer:

540/90=6

and is 6 cm

height is 6 cm

6 0
2 years ago
2 1⁄2 ÷ 1 3⁄6 please help me with the RIGHT answer.
ycow [4]

Answer:

1\frac{2}{3}

Step-by-step explanation:

We want to simplify:

2 \frac{1}{2}  \div 1 \frac{3}{6}

This is the same as:

2 \frac{1}{2}  \div 1 \frac{1}{2}

Now let us convert the mixed numbers to improper fractions.

\frac{5}{2}  \div  \frac{3}{2}

We multiply by the reciprocal of the second fraction to get:

\frac{5}{2}  \times  \frac{2}{3}

Cancel out the common factors to obtain:

\frac{5}{3}  = 1 \frac{2}{3}

5 0
3 years ago
Other questions:
  • Bakery had 54 rolls 1/6 sold in morning
    9·1 answer
  • What number is one fourth of the way between 4 and 12.4
    5·1 answer
  • Can someone help me, please?
    14·1 answer
  • During the Hari Keusahawanan in a school, 800 booklets of coupons were sold. The price of each booklet of coupons was RM30 and R
    5·1 answer
  • Triangle ABC is located at A (1,3), 8 (4,1) and C (3,4). Perform the following sequence of transformations.
    6·1 answer
  • Given a slope of m= 4 and a y-intercept of b = -7, write the equation of the line in Slope-Intercept form.​
    13·1 answer
  • Simplify. Rationalize the denominator.<br> -3/5 + √3
    5·1 answer
  • What is 2x - 5 = 11
    8·2 answers
  • 3) The perimeter of a triangle is 28x-7. 2 of the sides are 5X-3 and 12x+8. What is the third
    11·1 answer
  • Right now Seth's age is 4/5 the age of his brother Eric. Twenty-one years ago, Eric was twice as old as Seth. What are their age
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!