your answer is the first one
110 - (180 - 130) = 60°
watch the picture.
Answer:
Skewed to the left.
Step-by-step explanation:
Relationship between the mean and the median:
The mean is the average of all the values in a set.
The median is the one separating the lower 50% values of a set from the upper 50% of the values.
If the mean and the median are the same, the distribution is symmetric. That is, 50% of the values are above the mean, and 50% are below.
If the mean is higher than the median, the distribution is skewed to the left. Which means that a percentage higher than 50% of the values are below the mean, and a percentage lower than 50% of the values are above the mean.
If the mean is lower than the median, the distribution is skewed to the right. Which means that a percentage higher than 50% of the values are above the mean, and a percentage lower than 50% of the values are below the mean.
In this problem, we have that:
Mean = 29.4 inches
Median = 28.5 inches
Mean higher than the median. Which means that the histogram is skewed to the left.
Answer:
There is insufficient evidence to support the claim.
Step-by-step explanation:
What we need to do is calculate the z factor and see whether or not we can refute the manufacturer's claim.
We have to:
z = (p - pm) / [pm * (1-pm) / n] ^ (1/2)
where p is the probability of the random sample, 13% or 0.13 and pm the probability per microwave maker, that is, 10% or 0.1. n sample size which is 57.
When replacing, we are left with:
z = (0.13 - 0.1) / [0.1 * (1-0.1) / 57] ^ (1/2)
z = 0.75
This value corresponds in the normal distribution to 0.7734 (attached image), this value is very large to refute the above, it must give a value less than 0.05 to be able to be refutable.
Therefore there is insufficient evidence to support the claim.