Unformatted text preview: ercentage (based on 50%
34%
14%) 50% + 34% = 84% Your Z score Step 3: Make a rough [email protected] of shared area’s percentage (based on 50%
34%
14%) 50% + 34% + 14% = 98% Your Z score Step 3: Make a rough [email protected] of shared area’s percentage (based on 50%
34%
14%) 6 9/10/13 50% + 34% + 14% = 98% Your Z score Step 3: [email protected]: Our Z
score of 1.78 falls between 84% and 98% Your Z score Step 4: Find exact percentage using the normal curve table, adding 50% if necessary Your Z score 7 9/10/13 Your Z score Is 46.25 our ﬁnal answer? Your Z score No, we have to add 50%... Final answer is 96.25% 8 9/10/13 Your Z score 96.25% of scores fall below a Z score of 1.78 Check that this ﬁts with our [email protected] (84 to 98) Steps for ﬁguring percentage area above or below a [email protected] raw or Z score: 1. Convert raw score to Z score 2. Draw a normal curve, locate the area where the Z score falls on it, and shade in the area for which ﬁnding percentage 3. Make rough [email protected] of shaded area’s percentage (using 50%
34%
14% rule) Steps for ﬁguring percentage area above or below a [email protected] raw or Z score (cont’d): 4. Find exact percentage using normal curve table (pp. 671
674) If needed, add or subtract 50% from this percentage Check that exact percentage is within [email protected] range (from Step 3) 9 9/10/13 You can also use a similar process to: Find Z scores that correspond to a [email protected] percentage of scores Find what percentage of scores occur between any two [email protected] Z scores The length of [email protected] between supervisors and workers in a certain store is normally distributed with a mean of 4.0 minutes and a standard [email protected] of 0.8 minutes. a.
b.
c. What percentage of [email protected] are longer than 4.4 minutes? Shorter than 2 minutes? Between 3 minutes and 5 minutes? Popula.on: [email protected] group of people for which researcher intends...
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 Winter '13
 bernard
 Psychology, 14%, 98%, 34%, 68%, 84%, 96.25%

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