YessicaFrancoMATH1342.10POST3

What percentage of the area falls below the mean?

• 5%

• 25%

• 100%

• 50%

Find the area under the standard normal distribution curve.

Between z=1.23 and z=1.90

• 0.9713

• 0.8907

• 0.0806

• 0.9500

Find the probability using the standard normal distribution

P(z<1.60)

• 0.9452

• 0.9464

• 0.9567

• 0.8452

Find the probability using the standard normal distribution

P(z>0.87)

• 0.7080

• 0.0780

• 0.7880

• 0.8078

Find the following probabilities for the standard normal random variable z:

 P(z ≤ 1.33)

• 0.6452

• 0.9875

• 0.9082

• 0.3648

Find the following probabilities for the standard normal random variable z:

P(z > −0.68)

• 0.5468

• 0.7517

• 0.5479

• 0.7954

Admission Charges for Movies The average admission charge for a movie is $5.39. If the distribution of admission charges is normal with a standard deviation of $0.79, what is the probability that a randomly selected admission charge is less than $3.00?

• 0.2548

• 0.0001

• 0.2365

• 0.0012

Microwave Oven Lines A survey found that people keep their microwave ovens an average of 3.2 years. The standard deviation is 0.56 year. If a person decides to buy a new microwave oven, find the probability that he or she owned the old oven for the following amount of time. Assume the variable is normally distributed.

What if it was less than 1.5 years?

• 0.6974

• 0.0012

• 0.2548

• 0.3254

Microwave Oven Lines A survey found that people keep their microwave ovens an average of 3.2 years. The standard deviation is 0.56 year. If a person decides to buy a new microwave oven, find the probability that he or she owned the old oven for the following amount of time. Assume the variable is normally distributed.

What if it was between 2 and 3 years

• 0.6974

• 0.0012

• 0.2548

• 0.3432

What table is used for a standard normal distrbution?

• None

• D-table

• A-table

• Z-table