Refer to the data set in Table 1.7.

a. What is the average price for the phones?
b. What is the average talk time for the phones?
c. What percentage of the phones have a voice quality of excellent?

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TABLE 1.7 DATA FOR EIGHT CORDLESS TELEPHONES Overall Score Model Price ($) Brand AT&T CL84100 AT&T 60 73 TL92271 80 70 Panasonic 4773B 78 Panasonic 6592T 72 Uniden D2997 70 Uniden D1788 73 Vtech DS6521 72 Vtech CS6649 72 100 70 ! 45 0 50 50 80 60 Voice Quality Excellent Very Good Very Good Very Good Very Good Very Good Excellent Very Good Handset on Base Yes No Yes No No Yes No Yes Talk Time (Hours) 7 7 13 13 10 7 7 7