Answer:
hiiiiiiiiiiiiiiiiiiii thnk you so much
Step-by-step explanation:
Answer:
X/2 = 61.2
X=122.4
Step-by-step explanation:
Ok so we know that a number was halved so we can use x and equaled to 61.2 so we can do x/2 = 61.2
Answer: -418, 728, 446, -429, 1159, -696
Step-by-step explanation:
1.
.
2.
.
3.
.
4. The sum of 429 and 429 is
. We need to subtract this from 429, so
.
5. The sum of 510 and 319 is
. Subtracting -330, we get
.
6. Call the unknown number "
". Then
, so
. (Think about it.)
Answer:
a. 1.44
Step-by-step explanation:
We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 40%.
At the null hypothesis, it is tested if the proportion is of at most 40%, that is:

At the alternative hypothesis, it is tested if the proportion is of more than 40%, that is:

The test statistic is:
In which X is the sample mean,
is the value tested at the null hypothesis,
is the standard deviation and n is the size of the sample.
0.4 is tested at the null hypothesis:
This means that 
A random sample of 200 people was taken. 90 of the people in the sample favored Candidate A.
This means that:

Value of the test statistic:



Thus the correct answer is given by option a.