Flight times for commuter planes are normally distributed, with a mean time of 94 minutes and a standard deviation of 7 minutes. using the empirical rule, approximately what percent of flight times are between 80 and 108 minutes?
32%
68%
95%
99.7%

  95%

Step-by-step explanation:

The z-scores associated with the limits are ...

  z = (x -μ)/σ

  z = ({80, 108} -94)/7 = {-14, 14}/7 = {-2, 2}

That is, we're interested in flight times that lie within 2 standard deviations of the mean. The empirical rule tells us that 95% of the distribution lies within  2 standard deviations of the mean.

the answer is a.

step-by-step explanation:

in three games of golf, alex shot two under par four times.

b because it contains 40% of the possible results from the random list.  

0,1,2,3 v 4,5,6,7,8,9  

4 integers to 6 integers  

40% success vs 60% fail

step-by-step explanation: