NEED HELP ASAP | 25+ POINTS | PROPERTEIS OF EXPONENTS/SIMPLIFYING EXPRESSIONS | !!PLEASE I NEED HELP WITH THIS!! I WILL MARK AS
A BRAINLIEST.
Simplify the expression below. You must show ALL steps and circle your final answer!
Please draw and or explain all steps for me to use !! Thank you!!
Simplify the expression below. You must show ALL steps and circle your final answer!
Please draw and or explain all steps for me to use !! Thank you!!
2 answers:
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Answer:
Test statistics = 2.29
P-value = 0.01101
Step-by-step explanation:
We are given that a survey conducted five years ago by the health center at a university showed that 18% of the students smoked at the time. This year a new survey was conducted on a random sample of 200 students from this university, and it was found that 50 of them smoke.
Let Null Hypothesis, : p = 0.18 {means that the percentage of students who smoke has remained same at 18% over the last five years}
Alternate Hypothesis, : p > 0.18 { means that the percentage of students who smoke has increased over the last five years}
The test statistics used here will be ;
T.S. = ~ N(0,1)
where, = sample proportion of students = 50/200 = 0.25
n = sample size = 200
So, test statistics =
= 2.29
Now, P-value is given by = P(Z > 2.29) = 1 - P(Z <= 2.29)
= 1 - 0.98899 = 0.01101 or 1.101 %
Therefore, P-value of the test is 0.01101 .
Answer:
x= 13
Step-by-step explanation:
−4/9(18x − 36) = −88
we need to solve the equation for x
First we remove the fraction -4/9
Multiply by -9/4 on both sides
18x -36 = 198
Now add 36 on both sides
18x = 234
Divide both sides by 18
x = 13