grouped data and distribution

Question 1

histograms

Answer 1

graph that displays frequency of different outcomes within a sample

Question 2

how do you find the estimated mean in grouped data?

Answer 2

• take the midpoint (e.g 51-55= 53)
• times that by the frequency
• repeat for each group
• divide total by the number of observations

Question 3

normal distribution

Answer 3

bell shaped curve, helps predict probability
sometimes occurs in naturally occruing phenonena, mostly uncommon

Question 4

skew

Answer 4

one way distribution, deviates from normal

Question 5

positive skew

Answer 5

height on left side
mean more than median

Question 6

negtive skew

Answer 6

height on right
meadian more than mean