data analysis: graphs

Question 1

bar charts used?

Answer 1

• data representing difference in mean values visually
• bc bar charts are used by data divided into categories (discrete data)

Question 2

scattergrams used?

Answer 2

• depicit associations between co-variables
• represents strength and direction between co-variables in correlation

Question 3

normal distribution?

Answer 3

• symmetrical spread of frequency forming bell- shaped pattern
• mean, median, mode located at highest peak

Question 4

features of normal distribution?

Answer 4

• mean, median, mode located at peak/mid point of curve
• tails of curve/slop never touch X-axis (therefore never reach 0)

Question 5

skewed distribution?

Answer 5

• spread of frequency data that is not symmetrical where data clusters to one end.

Question 6

positive skew?

Answer 6

• type of distribution which the long tail/ slope is on the positive (right) side of peak and most of distribution is on left

Question 7

negative skew?

Answer 7

• type of distribution which long tail/slope is on negative (left) side of peak and most of distribution is on right