If the z-value for a given value x of the random variable x is z = 1.96, and the distribution of x is normally distributed with a mean of 60 and a standard deviation of 6, then the x-value that this z-value corresponds to is:
a. 71.76.
b. 67.96.
c. 61.96.
d. 48.24.
Question 2
The concept that allows us to draw conclusions about the population based strictly on sample data without having any knowledge about the distribution of the underlying population is
a. the central limit theorem.
b. the standard error of the mean.
c. the normal distribution.
d. the standard deviation.
e. the variance.
Gas molecules have no bonds to other molecules and move in random motion.
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