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Serjik [45]
3 years ago
14

How to solve probability​

Mathematics
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
You might be interested in
(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
6 0
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
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