Answer:
12.5
Step-by-step explanation:
Answer:
The answer is A
Step-by-step explanation:
when you see x and y side by side in a table, each row is one point on a graph. hope this helps!
Y is less than or equal to -16 i think but I’m not sure
Answer:
Yes
Step-by-step explanation:
First, suppose that nothing has changed, and possibility p is still 0.56. It's our null hypothesis. Now, we've got Bernoulli distribution, but 30 is big enough to consider Gaussian distribution instead.
It has mean μ= np = 30×0.56=16.8
standard deviation s = √npq
sqrt(30×0.56×(1-0.56)) = 2.71
So 21 is (21-16.8)/2.71 = 1.5494 standard deviations above the mean. So the level increased with a ˜ 0.005 level of significance, and there is sufficient evidence.
