1200 cards
All measurements should be taken in centimeters
<u>Calculate the area of large rectangular card</u>:
<u>Calculate the area of each small cards</u>:
<u>Divide the area of large card by area of small card</u>
Number of small cards: 1200 cards
Answer:
<u>Type I error: </u>D. Reject the null hypothesis that the percentage of adults who retire at age 65 is less than or equal to 62 % when it is actually true.
<u>Type II error: </u>A. Fail to reject the null hypothesis that the percentage of adults who retire at age 65 is less than or equal to 62 % when it is actually false.
Step-by-step explanation:
A type I error happens when a true null hypothesis is rejected.
A type II error happens when a false null hypothesis is failed to be rejected.
In this case, where the alternative hypothesis is that "the percentage of adults who retire at age 65 is greater than 62%", the null hypothesis will state that this percentage is not significantly greater than 62%.
A type I error would happen when the conclusion is that the percentage is greater than 62%, when in fact it is not.
A type II error would happen when there is no enough evidence to claim that the percentage is greater than 62%, even when the percentage is in fact greater than 62% (but we still don't have evidence to prove it).
Using empirical rule,
Upper range of 68%=15+5=20
Lower range =10
Range=10
<span>The answer is B. (2, 2).
The midpoint (M) of two points (x1, y1) and (x2, y2) is:
M = ((x1 + x2)/2, (y1 + y2)/2).
We know that the points of CD are C(-4, 8) and D(8, -4). So we have:
x1 = -4, y1 = 8, x2 = 8, y2 = -4.
Now when we have all we need, let's calculate the midpoint M.
M = ((x1 + x2)/2, (y1 + y2)/2);
M = (((-4) + 8)/2, (8 + (-4))/2);
M = ((8 - 4)/2, (8 - 4)/2);
M = (4/2, 4/2); M = (2, 2).
Therefore, the midpoint of CD is (2, 2).</span>
<em>So</em><em> </em><em>the</em><em> </em><em>right</em><em> </em><em>ans</em><em> </em><em>is</em><em> </em><em>3</em><em>%</em><em>.</em>
<em>Look</em><em> </em><em>at</em><em> </em><em>the</em><em> </em><em>attached</em><em> </em><em>picture</em><em>⤴</em>
<em>Hope</em><em> </em><em>it</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>
