Answer:
thats correct
Step-by-step explanation:
The mean of the
estimates is
seconds, and the standard deviation of the sample is about
. Then the test statistic is
![t=\dfrac{\bar x-\mu_0}{\frac s{\sqrt n}}](https://tex.z-dn.net/?f=t%3D%5Cdfrac%7B%5Cbar%20x-%5Cmu_0%7D%7B%5Cfrac%20s%7B%5Csqrt%20n%7D%7D)
where
is the mean under the null hypothesis. So
![t=\dfrac{62.2-60}{\frac{18.1}{\sqrt{15}}}\approx0.47](https://tex.z-dn.net/?f=t%3D%5Cdfrac%7B62.2-60%7D%7B%5Cfrac%7B18.1%7D%7B%5Csqrt%7B15%7D%7D%7D%5Capprox0.47)
We go on to find
![P(T>0.47)\approx0.32](https://tex.z-dn.net/?f=P%28T%3E0.47%29%5Capprox0.32)
so the difference is statistically significant and you reject the null hypothesis.
Answer:
x = the price of one coffee mug.
n = number of coffee mugs sold
115.50 = x × n
n = 115.50÷ x
you cant solve it without additional informations.
Answer:
Option C is correct.
288 degree measure could he have rotated the pentagon so that is mapped onto itself
Step-by-step explanation:
Given: Patrik rotated the pentagon about its center.
A Rotational symmetry of a regular polygon is based on the number of vertices it has.
If the Pentagon figure is rotated
about its center, each vertex lands exactly on the top of where it started.
Since you have 5 vertices, so your starting vertex can land in 5 different starting places and still come up with the same figure.
So if you take
rotations to each consecutive vertex.
⇒a rotation of 72 degree, 144 degree, 216 degree, 288 degree and 360 degree will result in the same figure.
Therefore, 288 degree measure could he have rotated the pentagon so that is mapped onto itself.
A fraction can really look like anything. So the quotient can be sometimes larger than the dividend.