CH06_worksheet_1.doc Assignment continues on back…î GBS 221 Trollen Chapter 6 Worksheet 1 1. Annual household income in a particular Phoenix neighborhood is Normally distributed with a mean of $30,000 and a standard deviation of $4,000. Check figure answers are provided in parentheses. a) What is the probability that a randomly selected family earns between $30,000 and $34,000? (A: 0.3413) b) What is the probability that a randomly selected family earns between $26,000 and $30,000? (A: 0.3413) c) What is the probability that a randomly selected family earns between $26,000 and $34,000? (A: 0.6826) d) What is the probability that a randomly selected family earns less than $22,000? (A: 0.0228) e) PN (X>29,000 | µ=30,000, σ=4,000)=? (A: 0.5987)CH06_worksheet_1.doc f) PN (28,000 < X < 36,000 | µ=30,000, σ=4,000) = ? (A: 0.6247) g) PN (X > 50,000 | µ=30,000, σ=4,000)=? (A: 0.0000) h) PN(35,000 < X < 40,000 | µ=30,000, σ=4,000) = ? (A: 0.0994) i) What income level defines the 75th percentile? (A: $32,680) j) What income level defines the 35th percentile? (A: $28,440) k) What income level separates the richest 10%? (A: