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Irina18 [472]
3 years ago
6

In a random sample of 75 individuals, it was found that 52 of them prefer coffee to tea. What is the margin of error for the tru

e proportion of all individuals who prefer coffee?
Mathematics
1 answer:
Ugo [173]3 years ago
4 0
0.106 is the answer

letters till 20 characters
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1 hour and 45 mins or 1 hour, 40 mins, and 5 seconds

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What are two numbers that add together to make -7 and that multiply to make 6
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A torist walks 10.5 inches in 3 seconds. how far does it walk per second​
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A group of three undergraduate and five graduate students are available to fill certain student government posts. If four studen
creativ13 [48]

Answer:

Pr = 0.4286

Step-by-step explanation:

Given

Let

U \to\\ Undergraduates

G \to Graduates

So, we have:

U = 3; G =5 -- Total students

r = 4 --- students to select

Required

P(U =2)

From the question, we understand that 2 undergraduates are to be selected; This means that 2 graduates are to be selected.

First, we calculate the total possible selection (using combination)

^nC_r = \frac{n!}{(n-r)!r!}

So, we have:

Total = ^{U + G}C_r

Total = ^{3 + 5}C_4

Total = ^8C_4

Total = \frac{8!}{(8-4)!4!}

Total = \frac{8!}{4!4!}

Using a calculator, we have:

Total = 70

The number of ways of selecting 2 from 3 undergraduates is:

U = ^3C_2

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U = \frac{3!}{1!2!}

U = 3

The number of ways of selecting 2 from 5 graduates is:

G = ^5C_2

G = \frac{5!}{(5-2)!2!}

G = \frac{5!}{3!2!}

G =10

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Pr = \frac{10*3}{70}

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Pr = 0.4286

5 0
2 years ago
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