Suppose that your statistics professor returned your first midterm exam with only a z-score written on it. She also told you that a histogram of the scores was mound shaped and approximately symmetric. How would you interpret each of the following z-scores? a. 2.2
b. 0.4
c. 1.8
d. 1.0
e. 0

A z-score specifies the number of standard deviations an observation is from the mean.  

Step-by-step explanation:

A z-score (aka, a standard score) specifies the number of standard deviations an observation is from the mean.  

The formula to compute the z-score is, , where X = value of the random variable, µ = mean, σ = standard deviation.

The random variable X follows a Normal distribution with parameters µ and σ².

(a)

A z-score of 2.2 implies that the score in the first midterm exam is 2.2 standard deviations above the mean.

(b)

A z-score of 0.4 implies that the score in the first midterm exam is 0.4  standard deviations above the mean.

(c)

A z-score of 1.8 implies that the score in the first midterm exam is 1.8  standard deviations above the mean.

(d)

A z-score of 1.0 implies that the score in the first midterm exam is 1.0  standard deviations above the mean.

(e)

A z-score of 0 implies that the score in the first midterm exam is 0  standard deviations above the mean. That is the score in the first midterm exam is same as the mean score.

is there supposed to be a diagram or a graph for this one? ?

step-by-step explanation:

127

whether it's diameter, or radius, i believe if i remember correctly from school, every amount has to always add up to 180. so if you take 53, and starting adding, long story short, taking 127 and adding it to 53, gives you 180.