Information from the dmv induicates the average of licensed drivers is mean- 39.7 and standard deviation of o-?

information from the dmv induicates the average of licensed drivers is mean- 39.7 and standard deviation of o- 12.5 years. assume that the distriubtion of drivers age is approx. normal.

x=85

x= 92

x=78

x=72

________

what is the probabilities for a normal distribution...

p(z>-1.00)

p(z>-0.80)

p(z<0.25)

p(z<1.25)

_________

For a normal shaped distribution with mean of 50 and a standard deviation of 8...?

what proportion of the scores have values between 46 and 54?

for samples of n=4 what proportion of the samples means have values between 45 and 54?

for salmpe of n=16 what proportion of the Sample mean have values between 46 and 54?

______

the average age for licensed drivers in the country is 42.6 yrs old with a standard deviation of 12. the distribution is approximatly the same.

a researcher obtained a sample of n= 36 drivers who received parking tickets. The average for these drivers was M=40.7. Is it a reasonable outs come for sa Sample of n=36 or is this Sample mean an extreme value?

the same researcher also obtained a sample of n= 16 drivers who received speeding tickets. The average age for this Sample was M= 34.4. Is this a reasonable outcome for a Sample of n= 16 or is the sample mean very different from what would usually be expected? computer the z-score for the sample mean.

_______

a random Sample is obtained from normal population with a mean of = 80. and a standard deviation of 8. which of the two is a most likely outcome?

- a sample mean greater then M= 86 for a Sample of n= 4 scores

- a sample mean greater then M=84 for a Sample of n=16

________

a population has a mean of 100 and a standard deviation of 20. find the z-scores coreeponding to each of the following sampe means obtained from this population...

M= 102 for a smaple of n= 4 scores

M=102 for a sample of n= 100 scores

M= 95 for a smaple of n= 16 scores

M=95 for a smaple of n=25 scores

______

information from the dmv induicates the average of licensed drivers is mean- 39.7 and standard deviation of o- 12.5 years. assume that the distriubtion of drivers age is approx. normal.

x=85

x= 92

x=78

x=72