The graph of the discrete probability distribution represents the number of
rooms in rented housing units in 2013.
(a) What is the probability that a
randomly selected rental unit has five
rooms?
(b) What is the probability that a
randomly selected rental unit has five or
six rooms?
(c) What is the probability that a
randomly selected rental unit has seven
or more rooms?
(d) If a rental unit is randomly selected,
how many rooms would you expect the
unit to have?

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)

europa2433

europa2433

step-by-step explanation:

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;