Consider a population of 500 mutual funds that primarily invest in large companies. You have determined that mean popula

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Consider a population of 500 mutual funds that primarily invest
in large companies. You have determined that mean population μ=10,
is the mean​ one-year total percentage return achieved by all the​
funds, and that the population standard​ deviation σ is σ=2.5.
According to the Empirical Rule, 95% of these funds are expected to
be within what two amounts. Select one:
a. Between 5.5 and 15.5
b. Between 7.5 and 12.5
c. Between 8 and 12
d. Between 5 and 15
Consider the sample data in the following frequency
distribution
Class Frequency
3–7 4
8–12 7
13–17 9
18–22 5
Total 25
Calculate the sample variance
Select one:
a.30
b.20
c.25
d.35
The following information is collected from students upon
exiting the campus bookstore during the first week of classes
a) Weight
b) Height
c) Method of payment
d) Age in years
Classify each of these variables as categorical or numerical. If
the variable is numerical, determine whether the variable is
discrete or continuous. In addition, determine the level of
measurement for these variables.
Age in years is what type of variable
Select one:
a.Numerical, continuous, ratio
b.Numerical, continuous, interval
c.Categorical, nominal
d.Numerical, discrete, ratio
p.s pls explain answer