Ms. Delany's grades were as follows ....

49 39 45 60 62 38 46 61 63 37 48 55

53 36 44 57 38 58 59 49 47 42 56 64

56 62 56 58 51 55 45 61 63 62 60 70

Find the mean, , and standard deviation, , of the data.

= ______________ = ______________

Construct a normal curve. Label it!

Little Sid Vicious scored a 61 What was his z-score? Z-score = _________

What percent of people scored better than Johnny based on his z score ? _____

What percent of people scored worse than Johnny based on his z score ? _____

Shaquille got a 51. What was his z-score? Z-score = _________

What percent of people scored better than Sampson based on his z score ? ____

What percent of people scored worse than Sampson based on his z score ? ____

Cecelia had a z-score of 1.2. Approximately what was her score? _________

Art had a z-score of - .5. Approximately what was his score? _________

2. What does it mean to have a z-score of 0? __________________________

3. What does it mean to have a z-score of 1? __________________________

4. What does it mean to have a z-score of -2? __________________________

5. A group of Jockeys were weighed and it was determined their mean weight was 112 lb with a standard deviation of 4.2 lbs.

If Miguel Cabrarra weighed 118 lbs. What percentile was he in?

If Juan Caston weighed 104 lbs, what percentile was he in?

Oscar Salazar was the 50th percentile. What was his z-score? His weight?

James Doyle was in the 74th percentile. What did he weigh?

6. Mr. Octavian's grades were as follows ....

79 89 85 80 82 78 77 76 80 87 78 75

73 86 84 77 76 76 75 89 97 82 86 84

76 72 86 78 71 75 80 81 83 82

Find the mean, , and standard deviation, , of the data.

= ______________ = ______________

Construct a normal curve. Label it!

Jim scored a 77 What was his z-score? Z-score = _________

What percent of people scored better than Jim based on his z score ? ____

What percent of people scored worse than Jim based on his z score ? ____

Janice got a 86. What was her z-score? Z-score = _________

What percent of people scored better than Janice based on her z score ? ____

What percent of people scored worse than Janice on based on her z score ? ____

Whitney had a z-score of 1.2. Approximately what was her score? ________

Heath had a z-score of - .5. Approximately what was his score? _________