a) What is the probability that exactly 2 have responded to the store’s most recent promotional campaign (rounded off to four decimals)? b) What is the probability that at least two have seen the campaign (rounded off to four decimals)? c) What is the probability that not more than two have seen the campaign (rounded off to four decimals)? d) Calculate the average number of customers responding to the advertisement (rounded off to two decimals). e) Calculating the variance of customers responding to the advertisement (rounded off to four decimals).
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.
5. About 5% of a store’s customers respond to advertised sales. The other 95% shop when they have
time or because they need an item, regardless of promotional advertising. Of the 21 customers randomly
selected in the shop, calculate the following questions:
a) What is the
campaign (rounded off to four decimals)?
b) What is the probability that at least two have seen the campaign (rounded off to four decimals)?
c) What is the probability that not more than two have seen the campaign (rounded off to four
decimals)?
d) Calculate the average number of customers responding to the advertisement (rounded off to two
decimals).
e) Calculating the variance of customers responding to the advertisement (rounded off to four
decimals).
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