An experiment was made to measure the mean number of axe strikes that is necessary to cut a tree trunk. 16 identical tree trunks were cut by a randomly chosen person. Observation Number of strikes
1 52
2 54
3 49
4 55
5 44
6 47
7 53
8 45
9 46
10 48
11 55
12 57
13 51
14 54
15 56
16 52
a. Use the Wilcoxon signed-rank test to investigate the claim that the median number of strikes is 50. Assume that the alternative is two-sided.
b. Determine the sum of the positive ranks.
c. Determine the sum of the absolute values of negative ranks.
d. Determine the value of test statistic.

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.

ljn

step-by-step explanation:

answer:   the paragraph proof is mentioned below.

step-by-step explanation:

given: in a δxwy where

such that, ∠wzx ≅ ∠yzx and zw≅zy

we have to prove that: segment zx is a perpendicular bisector of segment wy.

prove: since, zw≅zy ⇒ ∠wzy is a supplementary angle.

then, ∠wzy= 180°

⇒∠wzx + ∠yzx = 180° ( because xz divides ∠wzy into two parts)

but, ∠wzx ≅ ∠yzx ( given)

⇒∠wzy+∠wzy=180° ( by substitution)

⇒2∠wzy=180°

⇒∠wzy=90°

⇒∠wzy=∠yzx =90°

therefore, xz⊥wy where wz=zy

⇒zx is a perpendicular bisector of wy.