1. It has been estimated that 28% of all university students switch majors within their first two years of starting classes. If a random sample of 580 third-year students is taken at a city university, what is an estimate of the probability that 26% or less had switched majors within their first two years? UseAppendix B.1for thez-values.(Round thez-value to 2 decimal places and the final answer to 4 decimal places.)

Probability

1. A study of 245 advertising firms revealed their income after taxes:

Income after TaxesNumber of Firms

Under $1 million 136

$1 million to $20 million 75

$20 million or more 34

a.What is the probability an advertising firm selected at random has under $1 million in income after taxes?(Round the final answer to 2 decimal places.)

Probability

b-1.What is the probability an advertising firm selected at random has either an income between $1 million and $20 million, or an income of $20 million or more?(Round the final answer to 2 decimal places.)

Probability

A study of 245 advertising firms revealed their income after taxes:

Income after TaxesNumber of FirmsUnder $1 million136$1 million to $20 million75$20 million or more34

a.What is the probability an advertising firm selected at random has under $1 million in income after taxes?(Round the final answer to 2 decimal places.)

Probability

b-1.What is the probability an advertising firm selected at random has either an income between $1 million and $20 million, or an income of $20 million or more?(Round the final answer to 2 decimal places.)

Probability