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3 years ago

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How to solve probability

1 answer:

bekas [8.4K]3 years ago

8 0

Answer :

The change of occurring an event is known as Probability.

You can solve probability questions by following some formulas

Conditional probability- P ( A l B ) = P ( A ^ B ) / P (B)

Bayes - P (A l B) = P (B l A)

P (A) / P (B)

Complementary- P(A^c) + P (A) = 1

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(28 ÷ 4) • 5 - 6 + 4²

sergejj [24]

Use pemdas (parenthesis, exponents, multiplication/division, addition/subtraction)
(28/4)*5-6+4^2
7*5-6+4^2
7*5-6+16
35-6+16
29+16
45
Your answer should be 45. Remember PEMDAS:)

5 0

3 years ago

Consider a drug testing company that provides a test for marijuana usage. Among 310 tested subjects, results from 28 subjects w

Naily [24]

Answer:

$z=\frac{0.0903 -0.1}{\sqrt{\frac{0.1(1-0.1)}{310}}}=-0.569$

The p value for this case can be calculated with this probability:

$p_v =P(z$

Since the p value is higher than significance level we don't have enough evidence to conclude that the true proportion is significantly less than 0.1

Step-by-step explanation:

Information given

n=310 represent th sample selected

X=28 represent the subjects wrong

$\hat p=\frac{28}{310}=0.0903$ estimated proportion of subjects wrong

$p_o=0.1$ is the value to verify

$\alpha=0.05$ represent the significance level

t would represent the statistic

$p_v$ represent the p value

System of hypothesis

We want to test the claim that less than 10 percent of the test results are wrong ,and the hypothesis are:

Null hypothesis: $p\geq 0.1$

Alternative hypothesis: $p < 0.1$

The statistic is given by:

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

Replacing the info we got:

$z=\frac{0.0903 -0.1}{\sqrt{\frac{0.1(1-0.1)}{310}}}=-0.569$

The p value for this case can be calculated with this probability:

$p_v =P(z$

Since the p value is higher than significance level we don't have enough evidence to conclude that the true proportion is significantly less than 0.1

5 0

4 years ago

Need help on this question please help!

Anastaziya [24]

Answer:

the 12 ounce box good luck

4 0

3 years ago

Number 13 please thanks

laiz [17]

3.99$ I think for each watermelon I'm not 100% sure though

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3 years ago

Dan put's 11 dollars or his allowance in his savings account every week. how much money will he have affter 15 weeks

Gelneren [198K]

165 is your answer. :)

8 0

3 years ago

Read 2 more answers