A college reported that 40% of its population is male. Nine students are selected at random. (Consider "male" to be the success criteria in this example.)
. The mean is
. The standard deviation is
(Round to the nearest hundredth, if necessary.)
. Because the distribution has a probability of success (P(S)) that is close to 5
. Use the probability distribution table to find the following probabilities.
nx
9
•
the distribution is close to symmetric
Р
0
1
0.1 0.2 0.25 0.3 0.4 0.5 0.6 0.7 0.75 0.8 0.9
0.387 0.134 0.075 0.040 0.010 0.002 0.000 0.000 0.000 0.000 0.000
0.387 0.302 0.225 0.156 0.060 0.018 0.004 0.000 0.000 0.000 0.000
2 0.172 0.302 0.300 0.267 0.161 0.070 0.021 0.004 0.001 0.000 0.000
3 0.045 0.176 0.234 0.267 0.251 0.164 0.074 0.021 0.009 0.003 0.000
4 0.007 0.066 0.117 0.172 0.251 0.246 0.167 0.074 0.039 0.017 0.001
5 0.001 0.017 0.039 0.074 0.167 0.246 0.251 0.172 0.117 0.066 0.007
0.000 0.003 0.009 0.021 0.074 0.164 0.251 0.267 0.234 0.176 0.045
6
7 0.000 0.000 0.001 0.004 0.021 0.070 0.161 0.267 0.300 0.302 0.172
8 0.000 0.000 0.000 0.000 0.004 0.018 0.060 0.156 0.225 0.302 0.387
9 0.000 0.000 0.000 0.000 0.000 0.002 0.010 0.040 0.075 0.134 0.38