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3 years ago

Systematic random sampling is used to interveiw residents in 25% of 80 apartments in a building. The sampling interval would be

Mathematics

1 answer:

DedPeter [7]3 years ago

8 0

The answer is A, A is the answer

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8-3x=17 what does x equal

Dima020 [189]

Answer:

x = -3

Step-by-step explanation:

Step 1: Subtract 8 from both sides

8 - 3x - 8 = 17 - 8

-3x = 9

Step 2: Divide both sides by -3

-3x / -3 = 9 / -3

x = -3

Answer: x = -3

3 0

3 years ago

Read 2 more answers

he weight of a quarter is 5.670 grams. What is the weight of 5 quarters in centigrams? Label your answers and PAY ATTENTION to y

Marat540 [252]

Answer: 5669904.625 centigrams.

Step-by-step explanation:

3 0

3 years ago

In answering on a multiple choice test, a student either know the answer or guesses. Let p be the probability that the students

LenaWriter [7]

Answer:

$P(A_{1}|B ) =\frac{mp}{1+p(m-1)}$

Step-by-step explanation:

For mutually exclusive events as A1, A2, A3, etc, Bayes' theorem states:

$P(A|B)= \frac{P(B|A)P(A)}{P(B)}$

P(A|B) is a conditional probability: the likelihood of event A occurring given that B is true.

P(B|A) is a conditional probability: the likelihood of event B occurring given that A is true.

P(A) is the probability that A occurs

P(B) is the probability that B occurs

For this problem:

A1 is the probability that the student knows the answer

A2 is the probability that the student guesses the answer

B is the probability that the student answer correctly

$P(A_{1})=p \\P(A_{2})=1-p \\P(B|A_{1})=1 \\P(B|A_{2})=\frac{1}{m} \\P(B)= P(A_{1})P(B|A_{1}) + P(A_{2})P(B|A_{2})= p+\frac{1-p}{m} \\$

P(B|A₁) means the probability that the answer is correct when he knew the answer

P(B|A₂) means the probability that the answer is correct when he guessed the answer

P(A₁|B) means the probability that he knew the answer when the answer was correct

Replacing everything in the Bayes' theorem you get:

$P(A_{1}|B)= \frac{P(B|A_{1})P(A_{1})}{P(B)}=\frac{(1)(p)}{p+\frac{1-p}{m}} =\frac{mp}{mp+1-p} =\frac{mp}{1+p(m-1)}$

5 0

3 years ago

Penny reads 13 pages in 1/2 hour. What is the unit rate for pages per hour? For hours per page? How many hours per page

horsena [70]

Answer:

13 pages : 1/2 hour Multiply both sides by 2

26 pages : 1 hour ------>> 26 pages/hr

Flip over 26 pages/hr ----->>> hr / 26 pages = 1 hr / 26 pages

Split up the fraction: (1/26) hr / page

6 0

3 years ago

Read 2 more answers

Which exponential function has a growth factor of One-half?

Gemiola [76]

Answer:

An exponential function with a growth factor of 1/2 would have 1.5^x as part of it.

The exponential growth function is as follows.

r is the rate of growth (0.50)

3 0

2 years ago