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Find the expected frequency for each cell

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1. Use the following contingency table:

                                    A                     B                     Total

1                                  20                    30                    50

2                                  30                    20                    50

Total                            50                    50                    100

(a) Find the expected frequency for each cell?

(b) Compute X stat square? Is it significant at alpha-0.05?

2. The following table contains the probability distribution for X=the number of traffic accidents reported each day.

X                     0                      1                      2                      3                      4                      5

P(X)                0.10                 0.20                 0.45                 0.15                 0.05                 0.05

(a) The probability of 3 accidents is?

(b) The mean or expected value of the number of accidents is?

(c) The variance of the number of accidents is?

(d) The standard deviation of the number of accidents is?

Reference no: EM13245651

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