Answer:
To use a paired t-test
Step-by-step explanation:
t-tests are essentially tests carried out to compare two different groups to check if there is a major difference in their performances or results which may be related in certain characteristics.
A paired (correlated) t-test is used when there are matched pair of similar units or instances of repeated measurements.
In this case, Mary has to use a paired t-test because the samples (students) have high similarity in characteristics. The students in question has to be from the same class to test her hypothesis (similar characteristics).
We can use ratios here. The real size would have to be proportional, meaning that if I increase the line on the drawing 5 times, the real size would have to increase 5 times as well.
We can obviously see, after having said that, that the real window would have to be 35ft long (because we multiplied 1 inch by 5, and if 1 inch represents 7 feet, then we also have to multiply that by 5 so it’s proportional, and 7*5=35)
We can check too — 1 in : 7 ft = 5 in : x ft
x = (7ft * 5in) / 1in — we would get the same result :)
Answer:
should be 1350cm^2
Step-by-step explanation:
hope this helps
Answer: ∠A = 20°; ∠B = 59°; ∠C = 101°
Step-by-step explanation:
<u>According to the problem:</u>
- ∠A = ∠A
- ∠B = 4 · ∠A - 21°
- ∠C = 5 · ∠A + 1°
<u>All interior angles within a triangle adds up to 180°:</u>
∠A + ∠B + ∠C = 180°
<u>Substitute in the value of ∠A into the other equations:</u>
∠B = 4 · ∠A - 21° = 4(20°) - 21° = 80° - 21° = 59°
∠C = 5 · ∠A + 1° = 5(20°) + 1° = 100° + 1° = 101°
Answer:
1/12
Step-by-step explanation:
I got this question on one of my quizzes
WHC 1 WWBHC 1 <u>Explanation:</u> there are 12 samples and they asked us to
WHS 2 <u>WWBHS 2</u> pick 1 so it would be 1/12
(whole wheat bread, ham, swiss)
WHA 3 WWBHA 3
WTC 4 WWBTC 4
WTS 5 WWBTS 5
WTA 6 WWBTA 6