Distribution.

Question 1

Conditions for normal distribution (3).

Answer 1

1) the data is continuous.
2) the distribution is symmetrical (has no skew).
3) the mode, median and mean are all approximately equal.

Question 2

Conditions for binomial distribution:

Answer 2

1) fixed number of trials.
2) each trial has 2 outcomes, success or failure.
3) all the trials are independent of each other.
4) the probability of success is constant.

Question 3

How do you calculate the tails of a normal distribution graph?

Answer 3

Left tail = mean - 3 standard deviations

Right tail = mean + 3 standard deviations

Question 4

In a normal distribution graph, the smaller the standard deviation, the [blank] the curve.

Answer 4

Taller.

Question 5

What does smaller standard deviation mean about the values in the data set?

Answer 5

They’re closer to the mean.