6.2 Day 2

The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5.  What proportion of weeks would you expect to have less than 5 accidents? Find Normal CDF

• 0.6915
• 0.1753

• 0.8238
• -0.93

The mean number of accidents a week at a company is 6.4 with a standard deviation of 1.5.  What proportion of weeks would you expect to have more than 7 accidents? Find the Normal CDF

• 0.3446
• 0.2856
• 0.4
• 0.6554

μ = 70 , σ = 8 , X = 50 . Find z score

• 2.5
• -2.5
• 5.2
• -5.2

The shelf life of a particular dairy product is normally distributed with a mean of 12 days and a standard deviation of 3 days.
About what percent of the products last between 12 and 15 days? Find the Normal CDF.

• 68%
• 34%
• 16%
• 2.5%

Which distributions have the same mean? Check all that apply.

• red

• yellow

• green

• blue

• none of them have the same mean

Which distribution has the smallest standard deviation?

• red

• yellow

• green

• blue

• they are all the same

In a survey of men in the United States (ages 20-29), the mean height was 69.6 inches with a standard deviation of 3.0 inches. Find the minimum height in the top 17.5% percentile. Find the INVERSE Normal

• 69.98 in

• 71.18 in

• 66.8 in

• 73.01 in

Suppose the amount of soda in a can is normally distributed; the mean is 16 oz and standard deviation is 0.4 oz. How much soda is in the lightest 22% percentile of cans? Find the INVERSE Normal

The distances male long jumpers for State College jump are approximately normal with a mean of 263 inches and a standard deviation of 14 inches.  
Suppose a male long jumper's jump ranked in the 75th percentile.  How long was his jump? Find the INVERSE Normal

• 0.67 inch
• 263 inches
• 272.44 inches
• 277.25 inches

In a Standard Distribution Curve N(0,1), find the z-score for the lowest 7th percentile. Use the Inverse Normal