No matter how many times I read and re-read the notes, I am confused. Thank you very much.

Please, help with this. No matter how many times I read and re-read the notes, I am confused. Thank you very much.

1-If you toss a dice twice, what is the probability that the total is none of {4,6,9}.

a) none of the other answers are correct.

b)29/36

c)3/26

d)24/36

2- True statements about the normal probability distribution.

a) The random variable takes any value.

b) The distribution has one mode and has positive skew

c)The mean, median, and mode are equal.

d) Standardizing an observation of any normal distribution allows the use of the standard normal (Z) distribution tables.

e) The distribution has one mode and is bell shape.

f) The area under the bell curve is 1 exactly.

g) The random variable does not take any value. It takes discrete value like the binominal distribution.

3-Which excel function is used to compute the variance of a sample of bag weights (lbs)?

a) VAR.P

b) STDEVA

c) VAR.S

d) STDEV.S

e) STDEV.P

4-Whether the distribution of the mean of a large number of independent, identically distributed variables will be approximately normal on the underlying distribution.

True/False?