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.
<span>I think the answer to this equation is26.7</span>

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Tentukan mean, median, dan modus dari 7,4,5,6,7,4,5,7,8,9, dan 6
Anvisha [2.4K]
Answer:
<h3>Median = 6</h3><h3>Mean = 6,1</h3><h3>Modus = 7</h3>
Step-by-step explanation:
Median (Nila tengah setelah data diurutkan)
= 4, 4, 5, 5, 6, 6, 7, 7, 7, 8, 9
= 6
Mean
= jumlah data / banyak data
= 4+4+5+5+6+6+7+7+7+8+9/11
= 68/11
= 6,1
Modus
= data yang paling banyak muncul
= 7 (muncul sebanyak 3 kali)
The equation of any straight line, called a linear equation, can be written as: y= mx+b, where my is the slope of the line and b is the y-intercept. The y-intercept of this line is the value of y at the point where the lone crosses the y axis.