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3 years ago

Which of the following probabilities are most likely independent?

2 answers:

6 0

Independent probablities don't affect each other
dependent problities affect each other

example, an independent probalbity would be like probablity of picking a green marble then throwing a 10 in darts

dependent would be picking 2 green marbles in a row from the same box with no replacement

so

A. hair color affects where his father lives? nope. so this is likely independent
B. hair color doesn't really affect the kind of job you have (unlesss you are a model or secretary or something), so this is independent
C. this is dependent because the teen will spend less time on homework because he watched tv
D. compouters and IT are related. a tech may want to have more than 1 compouter at home, maybe not, so I wuld say dependent

answers are A and B

Fantom [35]3 years ago

3 0

I think C
Because if a teen watches a T.V show for more than 6 hours it's sure that he's not gonna finish homework.
Hope it helps!

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Besty has N quarters.You can use the expression 0.25N to find the total value of her coins in dollars.What is the value of 18 co

allochka39001 [22]

Using .25N, you set N equal to 18 for 18 quarters. so .25(18) = 4.50

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3 years ago

Over the past several years, the proportion of one-person households has been increasing. The Census Bureau would like to test t

Ganezh [65]

Answer: z =2.39

Step-by-step explanation:

Given :

$H_0: p \leq0.23\\\\ H_a: p > 0.23$

A random sample of 136 households found that 43 consisted of one person.

i.e. Sample size : n= 136

Sample proportion : $\hat{p}=\dfrac{43}{136}=0.316176470588\approx0.3162$

Test statistic for proportion :-

$z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

$\Rightarrow z=\dfrac{0.3162-0.23}{\sqrt{\dfrac{0.23(1-0.23)}{136}}}\\\\\Rightarrow\ z=\dfrac{0.0862}{\sqrt{0.00130220588235}}\\\\\Rightarrow\ z=\dfrac{0.0862}{0.0360860898734}\\\\=2.38873206552\approx2.39$

Hence, the value of the test statistic: z =2.39

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3 years ago

Algebra 2! please help!

valentina_108 [34]

Answer:

Choice C)

x^2 - 2x + 4 - 12/(x+2)

$x^2 - 2x + 4 - \frac{12}{x+2}$

====================================================

Explanation:

To see how I got that answer, I have provided two attached images below. One of them shows the polynomial long division. The other shows synthetic division. Both are valid options to get to the same answer.

For each method, I used 1x^3 + 0x^2 + 0x - 4 in place of x^3 - 4 so that the proper terms could align.

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3 years ago

How many different integers can have the same absolute value

LUCKY_DIMON [66]

Integers are like -4,-3,-2,-1,0,1,2,3,4,5 etc

absolute value tells you how far the number is from 0

so example: |-5|=5=|5|

2 different integers can have the same absolute value
as long as they are negative of each other
like x and -x

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4 years ago

What are the values of a and b?

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Where is the picture

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3 years ago