intro to statistics; the table shows results of a survey in which 3,405,100 publ

Question

intro to statistics;

the table shows results of a survey in which 3,405,100 public and 489900 private school teachers were asked about their full-time teaching experience

3,895,500

a) find the probability that a randomly selected private school teacher has 10 to 20 years full time teaching experience

b) find the probability that a randomly selected public school teacher has 3 to 9 years full time teaching experience

c) are the events "being a public school teacher" and haing more that 20 years experience independent?

d) find the probability that a randomly selected teacher has 3 to 9 years of full time teaching or is at private school?

public private total less than 3 years 456,300 115,600 571,900 3 to 9 1,144,100 151,900 1,296,000 10 to 20 years 997,700 120,500 1,118,200 more than 20 years 3,405,100 489,900

3,895,500

Explanation / Answer

intro to statistics; the table shows results of a survey in which 3,405,100 publ

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