UOP QNT275 Week 3 Quiz Latest 2020

QNT275 Statistics for Decision Making

Week 3 Quiz   

For any normally distributed random variable with mean μ and standard deviation σ, the percent of the observations that fall between   and    is closest to _______. ?

You work in marketing for a company that produces work boots. Quality control has sent you a memo detailing the length of time before the boots wear out under heavy use. They find that the boots wear out in an average of 208 days, but the exact amount of time varies, following a normal distribution with a standard deviation of 14 days. For an upcoming ad campaign, you need to know the percent of the pairs that last longer than six months-that is, 180 days. Use the empirical rule to approximate this percent.?

What is probability?

?Which of the following is correct?

?A continuous random variable has the uniform distribution on the interval [a, b] if its probability density functionf(x) ___________.

?The probability that a normal random variable is less than its mean is ____.

?Which of the following can be represented by a continuous random variable?

?What does it mean when we say that the tails of the normal curve are asymptotic to the x axis?

?Which of the following can be represented by a discrete random variable?

Mutually exclusive and collectively exhaustive events _______________.?