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Flauer [41]
3 years ago
10

Carmela randomly selected 65 stamps from a stamp collection. Eleven of these were commemorative stamps. What is the interval est

imate for the proportion of commemorative stamps in the entire collection if the sampling method had a margin of error of ±0.025?
Mathematics
1 answer:
Olenka [21]3 years ago
3 0
Since there is no mean, we need to first get the probability:
p = 11/ 65 = 0.1692
This will make it easier to compute for the interval estimate. Interval Estimate = probability ± margin of error
upper limit = 0.1692 + 0.025 = 0.1942

lower limit = 0.1692 - 0.025 = 0.1442
So the interval estimate is 0.1442 < x < 0.1942
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Two students taking a multiple choice exam with 20 questions and four choices for each question have the same incorrect answer o
MrRa [10]

Answer:

The Possible model is binomial distribution model.

Step-by-step explanation:

The argument that both students cheated in the exam can be proved by a hypothesis that both the students got the same answers incorrectly.

The same incorrect answers prove that both students have cheated on the test.

Therefore the sample of incorrect answers is, n = 8

Thus, the success probability, P = 0.25

Since the given condition has only two outcomes that are choosing the same answer or not choosing the same answer. Thus, this can be solved by the binomial distribution model.

So, binomial distribution with n = 8 and p = 0 .25.

3 0
3 years ago
4. Two families went camping. The Becker family was 4 miles west of the campsite lake. The Dunn family
tresset_1 [31]

They were 1 mile away from each other.

4-3=1 mile

8 0
3 years ago
Convert 2 inches into centimeters. Round your answer to the nearest tenth.
kobusy [5.1K]

Answer:

5.1 centimeters (5.08 not rounded)

Step-by-step explanation:

1 inch=2.54 centimeters

2.54*2=5.08

7 0
3 years ago
find the circumference of the circle. d=23 in. a)144.44 in b)1661.06 in c)36.11 in d)72.22 in e)415.27 in
snow_lady [41]

Circumference of a circle = \pi (diameter)

Diameter = 23 in.

Plug in the diameter = 23 in in the formula of circumference given above

Circumference of a circle = \pi (23)

Circumference of a circle = 23 \pi

\pi = 3.14

Circumference of a circle = 23 (3.14)

Circumference of a circle = 72.22 in

Option D is the answer

4 0
3 years ago
Read 2 more answers
Solve for y if: x=2 y=5x+3
nika2105 [10]
Substitute in x = 2:

y = 5(2) + 3

y = 10 + 3

y = 13
4 0
3 years ago
Read 2 more answers
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