BUAL 2650 EXAM 1 STUDY GUIDE
CORRECT 100%
normal probability plot - ANSWERgraphic used to virtually check whether data
comes from a normal population
uniform distribution - ANSWERcontinuous probability distribution having a
rectangular shape, where the probability is evenly distributed over an interval or
numbers
mean, standard deviation - ANSWERspecific shape of each normal distribution is
determined by its _________ & ____________.
equal 1 - ANSWERarea under the curve of a valid continuous probability distribution
must ________.
larger values - ANSWERwhat values of the standard deviation result in a normal
curve that is wider & flatter?
relative frequencies of all possible values of x are about the same - ANSWERits
appropriate to use the uniform distribution to describe a continuous random variable
x when:
np >= 5 and n(1-p) >= 5 - ANSWERnormal approximation of the binomial distribution
is appropriate when:
the fill weight is less than 910 grams - ANSWERthe fill weight of a certain cereal is
normally distributed with a mean of 910 grams and a standard deviation of 5 grams.
we calculated the value of z for a specific box of this brand of cereal, and the z value
was negative. this negative z value indicates that:
95.44% of all possible observed values of the random variable x are plus or minus 3
standard deviations of the population mean - ANSWERwhich statement is NOT a
property of the normal probability distribution?
99.73 - ANSWERif the random variable x is normally distributed, ______ % of all
possible observed values of x will be within 3 standard deviations of the mean
standard deviations - ANSWERthe z value tells us the number of ______ that a
value of x is from the mean
0 - ANSWERthe mean of a standard normal distribution is always equal to
__________
CORRECT 100%
normal probability plot - ANSWERgraphic used to virtually check whether data
comes from a normal population
uniform distribution - ANSWERcontinuous probability distribution having a
rectangular shape, where the probability is evenly distributed over an interval or
numbers
mean, standard deviation - ANSWERspecific shape of each normal distribution is
determined by its _________ & ____________.
equal 1 - ANSWERarea under the curve of a valid continuous probability distribution
must ________.
larger values - ANSWERwhat values of the standard deviation result in a normal
curve that is wider & flatter?
relative frequencies of all possible values of x are about the same - ANSWERits
appropriate to use the uniform distribution to describe a continuous random variable
x when:
np >= 5 and n(1-p) >= 5 - ANSWERnormal approximation of the binomial distribution
is appropriate when:
the fill weight is less than 910 grams - ANSWERthe fill weight of a certain cereal is
normally distributed with a mean of 910 grams and a standard deviation of 5 grams.
we calculated the value of z for a specific box of this brand of cereal, and the z value
was negative. this negative z value indicates that:
95.44% of all possible observed values of the random variable x are plus or minus 3
standard deviations of the population mean - ANSWERwhich statement is NOT a
property of the normal probability distribution?
99.73 - ANSWERif the random variable x is normally distributed, ______ % of all
possible observed values of x will be within 3 standard deviations of the mean
standard deviations - ANSWERthe z value tells us the number of ______ that a
value of x is from the mean
0 - ANSWERthe mean of a standard normal distribution is always equal to
__________
