# Quiz 6 Pre-Assessment

## Quiz by Monica Hyjek

Probability and Statistics

Mathematics

Virginia Standards of Learning

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6 questions

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- Q1Washing machine life spans are normally distributed, with a mean of 14.6 years and standard deviation of 3.7 years. The 10% of washing machines with the shortest lifespans will last how many years or less ?6.09.923.219.330s
- Q2Given a standard normal distribution, what is the probability that a randomly selected value will be less than -1.4?83.8%91.9%8.1%16.2%30sAII.11.c
- Q3Washing machine life spans are normally distributed, with a mean of 14.6 years and standard deviation of 3.7 years. What percent of washing machines should we expect to last over 20 years ?92.78%7.09%7.22%72.22%30s
- Q4Given a standard normal distribution, what z-score is found at the 4th percentile?-1.750.25-0.251.7530s
- Q5Given a standard normal distribution, what is the probability that -1.2<z<2.7?88.15%11.85%88.49%99.65%30s
- Q6Washing machine life spans are normally distributed, with a mean of 14.6 years and standard deviation of 3.7 years. What age washing machine would fall in the top 1%?10 years and over23 years and over6 years and under19 years and over30s