What does a highter and lower standard deviation tell ? what does a higher and lower z-score tell you ? what does the varience tell you?

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

We have 339 ounces of jam to be divided up equally for 12 people how muny ounces will each person get

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)