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3 years ago

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Consider a finite population with five elements labeled A, B, C, D, and E. Ten possible simple random samples of size 2 can be s

elected. Using simple random sampling, what is the probability that each sample of size 2 is selected

1 answer:

LenKa [72]3 years ago

8 0

Answer: 4/25

Step-by-step explanation:

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Find the value of x in the triangle shown below.<br> X<br> 4<br> 5

Mariulka [41]

Answer:

its b

Step-by-step explanation:

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3 years ago

Could anyone help please i am very bad at math :( <br> what is 3/5 of 50

artcher [175]

<span><span>3/5(50)
=(3/5)(50/1)
=(3)(50)/(5)(1)
=150/5
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3 years ago

a student named sarah hill follow the steps below to find her magic number 1 find the number of letters in her first name 2 find

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Her magic number is 126.

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3 years ago

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Joe heard from a reliable source that only 22% of people actually sleep 8 hours or more per night. You do a survey and find 58 o

Juliette [100K]

Answer:

95% Confidence interval: (31.32%,47.04%)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 148

Number of people who sleep for 8 hours or longer, x = 58

$\hat{p} = \dfrac{x}{n} = \dfrac{58}{148} = 0.3918$

95% Confidence interval:

$\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.05} = 1.96$

Putting the values, we get:

$0.3918\pm 1.96(\sqrt{\dfrac{0.3918(1-0.3918)}{148}})\\\\ = 0.3918\pm 0.0786\\\\=(0.3132,0.4704)=(31.32\%,47.04\%)$

(31.32%,47.04%) is the required 95% confidence interval.

8 0

3 years ago

Find the value of x and y in the given parallelogram

frez [133]

Answer:

Step-by-step explanation:

9y-4 = 50

9y = 54

y= 6

9y-4+7x+xy = 180

9(6)-4+7x+6x= 180

54-4+13x = 180

13x+50 = 180

13x = 130

x = 10

6 0

3 years ago