probability

Question

question:

a film distribution manager calculates that 7% of the films released are flops. If the manager is accurate, what is the probability that the proportion of flops in a sample of 638 released films would differ from the population proportion by greater than 3%?

Answer 1

638 flops                  638

            

                                                           44.66

                                                            _____   =     0.07 = 7%

                                                              638

 

X 0.03                      x 0.07                                                           The population portion differed but in rectitude to 

                                                                                                                to the proportions there was no change.

_________                ______                  19.11

                                                             _____=     0.03    3%

                                                              638

 

 19 . 11                      44.66