Time spent serving a customer at a cafe is normally distributed, with ? = 7 minutes and ? = 1.8 minutes. (a) If you select a random sample of duration serving twenty five (25) customers, determine the probability that the sample mean is between 6.8 and 7.2 minutes. (b) If you select a random sample of 144 customers, determine the probability that the sample mean is between 6.8 and 7.2 minutes. (c) Explain the difference in the results of (a) and (b).
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
Time spent serving a customer at a cafe is
(a) If you select a random sample of duration serving twenty five (25)
customers, determine the probability that the sample mean is between 6.8
and 7.2 minutes.
(b) If you select a random sample of 144 customers, determine the probability
that the sample mean is between 6.8 and 7.2 minutes.
(c) Explain the difference in the results of (a) and (b).
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