Five hundred smartphone owners were asked if they use their phones to download sports scores. The responses are summarized in the following table:

Yes No Total Male 195 105 300 Female 70 130 200 Total 265 235 500

a. What is the probability that a randomly sampled respondent from this group has used his or her smartphone to download sports scores?

b. What is the probability that a randomly sampled respondent from this group is female?

c. Given that a randomly sampled respondent has not used the smartphone to download sports scores, what is the probability that he or she is male?

d. Are the responses Yes and No independent of the respondent’s gender?