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sweet-ann [11.9K]
3 years ago
6

From a survey of 100 people we found that 62 drink pepsi, 36 drink coke and 30 drink both. How many drink only Coke? How many dr

ink neither?
Mathematics
1 answer:
Wittaler [7]3 years ago
6 0
The numbers aren't accurate, they dont add up
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A controversial bill is being debated in the state legislature. Representative Williams wants to estimate within 5 percentage po
Vedmedyk [2.9K]

Answer:

768

Step-by-step explanation:

Given that:

Error margin (E) = 5% = 0.05

Confidence level = 95%

Proportion p = 0.5 (since no prior value is given) ; also n1 = n2 = sample size

n = (Z / E)^2 * (1 - p)

1 - p = 1 - 0.5 = 0.5

Zscore at 95% confidence = 1.96

n = (1.96 / 0.05)^2 * 0.5

n = 39.2^2 * 0.5

n = 1536.64 * 0.5

n = 768.32

Hence, sample size = 768 SAMPLES

3 0
3 years ago
Selena walks from home to school each morning and back home each afternoon altogether she walks to 3/2miles each day how far is
Paul [167]
Selena lives 3/4 miles away from school
4 0
3 years ago
I need emergent help matching these math words
Blababa [14]
Complementary angles - the sum of two angles equals 90 degrees

Exterior angle theorem- the sum of the remote interior angles of a triangle equals the outside angle

Isosceles triangle- has two equal sides and two equal angles

Supplementary angle- the sum of two angles equals 180 degrees

Triangle sum theorem- the sum of of interior angles equal 180

Vertical angles- congruent angles that are opposite of each other.
8 0
3 years ago
Read 2 more answers
Consider a population list x with μx=10 and SDx = 1. A second population list, y, with μy=10 and SDy=2, is added to the first li
Basile [38]

Answer:

The combined standard deviation is 1.58114.

Step-by-step explanation:

The formula to compute the combined standard deviations of two different data sets is:

SD_{c} =\sqrt{\frac{n_{X}S^{2}_{X}+n_{2}S^{2}_{Y}+n_{X}(\mu_{X}-\mu_{c})^{2}+n_{Y}(\mu_{Y}-\mu_{c})^{2}}{n_{X}+n_{Y}}

Here \mu_{c} is the combined mean given by:

\mu_{c}=\frac{n_{X}\mu_{X}+n_{Y}\mu_{Y}}{n_{X}+n_{Y}}

It is provided that the sample size is same for both the data sets, i.e.n_{X} = n_{Y}=n

Compute the combined mean as follows:

\mu_{c}=\frac{n_{X}\mu_{X}+n_{Y}\mu_{Y}}{n_{X}+n_{Y}}\\=\frac{(n\times10)+(n\times10)}{n+n}}\\=\frac{20n}{2n}\\ =10

Compute the combined standard deviation as follows:

SD_{c} =\sqrt{\frac{n_{X}S^{2}_{X}+n_{2}S^{2}_{Y}+n_{X}(\mu_{X}-\mu_{c})^{2}+n_{Y}(\mu_{Y}-\mu_{c})^{2}}{n_{X}+n_{Y}}}\\=\sqrt{\frac{(n\times1^{2})+(n\times2^{2})+(n(10-10))+(n(10-10))}{n+n}}\\=\sqrt{\frac{n+4n}{2n} } \\=\sqrt{\frac{5n}{2n} } \\=\sqrt{\frac{5}{2}} \\=1.58114

Thus, the combined standard deviation is 1.58114.

3 0
3 years ago
For how many integer values of n will the value of the expression 4n + 7 be an integer greater than 1 and less than 200?
Morgarella [4.7K]

Answer:

48

Step-by-step explanation:

We are asked that the value of (4n + 7) will be an integer > 1 and < 200, for how many integer values of n.

So, equating (4n + 7) with 200 we can get the value.

4n + 7 = 200

⇒ 4n = 193

⇒ n = 48.25

Hence, the value of n will be the largest integer less than 48.25.

Therefore, the number of integer values of n will be 48. (Answer)

3 0
3 years ago
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