All categories

3 years ago

Will all random samples from a given population have the same mean? Provide an explanation with your answer.

Mathematics

2 answers:

avanturin [10]3 years ago

5 0

Short answer No.

Explanation

Suppose you have a sample of coins that have the date of production on them. They go from 1990 to 2000 inclusive. There are 100 coins in each year. That means there are 1100 coins because there are 11 years. Now you pick out 10 coins without replacement. Let's say all of them are from 1999. Then the mean is 1999.

If you start again and pick out 10 and get 3 years

4 from 2000

2 from 1995

4 from 1992

Whatever the mean is, it is not 1999. The mean of the second batch is 1995.8!

Tpy6a [65]3 years ago

5 0

Answer:

Data from random samples will not always include the same values. Values are chosen randomly and they may or may not be the same. So means will vary among samples.

Step-by-step explanation:

Even though the data comes from the same population, different values are chosen with each sample.

You might be interested in

Find the volume of x.

bogdanovich [222]

Answer:

98 degrees

Step-by-step explanation:

the full degree of a triangle is 180 degrees

52 + 30 = 82

180 - 82 = 98

5 0

2 years ago

What is the area of this shape?

Elena L [17]

Answer:

12mm (triangle)

165mm (whole shape)

Step-by-step explanation:

The triangle is 6 x 4 = 24 ÷ 2= 12

(divide by 2 because its a teiangle)

2nd shape is 10 x 8 = 80

3rd shape is 6 x 12 = 72

72 + 80 + 12 = 165mm

8 0

3 years ago

Select the fraction that is equivalent to one third.

denpristay [2]

Answer:

$\frac{2}{6}$ (two sixths)

Step-by-step explanation:

if we scale the fraction 1 / 3 to find equivalent fractions, we can simply multiply both numbers by the same factor.

So, by multiplying both 1 and 3 by two, we will have an equivalent fraction

1 × 2 = 2
_ _

3 × 2 = 6

This means that

$\frac{1}{3}$ (one third) is equivalent to $\frac{2}{6}$ (two sixths)

5 0

2 years ago

Indicate whether the following congruence statement is true or false. 50 points

andreyandreev [35.5K]

Step-by-step explanation:

The congruence statement is correct as KL = KR, LM = RQ and MK = QK. Also all the congruent angles correspond to the respective letters.

8 0

3 years ago

Read 2 more answers

The length of a rectangular driveway is four feet less than five times the width. The area is 672 feet squared. Find the width a

Svetach [21]

Answer: length of the drive way = 56 feet

Width of the driveway = 12 feet

Step-by-step explanation:

The rectangular driveway has two equal lengths and two equal widths. The area of the driveway is expressed as

length,l × width,w

The area is 672 feet squared. It means that

L×W = 672

The length of the rectangular driveway is four feet less than five times the width. It means that

L = 5W - 4

Substituting L = 5W - 4 into LW = 672

W(5W - 4) = 672

5W^2 - 4W - 672 = 0

5W^2 + 56W - 60W - 672 = 0

W(5W + 56) - 12(5W + 56) = 0

(W - 12)(5W + 56) = 0

W - 12 = 0 or 5W + 56 = 0

W = 12 or 5W = -56

W= 12 or W = - 56/5

The Width cannot be negative , so

W = 12

LW = 672

12L = 672

L = 672/12 = 56

7 0

3 years ago