Point D is rotated 180 degrees using B as the center. Explain why the image of D must lie on the ray BA.
1 answer:
Answer:
The image of must lie on the ray
, since ray
is antiparallel to ray
. That is, the angle between both rays is 180 degrees.
Step-by-step explanation:
Let be the image of
such that
is rotated 180 degrees counterclockwise with
as center of rotation.
must lie on the ray
, since ray
is antiparallel to ray
. That is, the angle between both rays is 180 degrees.
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Answer:
50
Step-by-step explanation:
Level of significance, a = 0.01
Type II error probability, b =0.05
From the z-table:
the critical value at 1% level of significance, Zα = Z0.01 = 2.33
the critical value at 5% probability, Zβ = Z0.05 = 1.645
The critical value of z can be obtained from the standard normal table using the desired level of significance and the tail of test.
The critical value tells the number of standards deviations away is the result from the mean.
Probability of type I error denoted by a
Probability of type II error denoted by b.
Type I error is to falsely infer the existence of something that is not there, while a type II error is to falsely infer the absence of something that is.
From the given information,
a=0.01, b=0.05, o1 = o2 =0.05, Dο = 0, D' = 0.04
The sample size is calculated as,
n =
=
= 49.38
which is 50 [Rounded to next integer]
