Scratch off Many stores run “secret sales”: Shoppersreceive cards that determine how large a discount theyget, but the percentage is revealed by scratching off thatblack stuff (what is that?) only after the purchase has beentotaled at the cash register. The store is required to reveal(in the fine print) the distribution of discounts available.Which of these probability assignments are legitimate? 10% off 20% off 30% off 50% offa) 0.20 0.20 0.20 0.20b) 0.50 0.30 0.20 0.10c) 0.80 0.10 0.05 0.05d) 0.75 0.25 0.25 -0.25e) 1.00 0 0 0
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.
Scratch off Many stores run “secret sales”: Shoppers
receive cards that determine how large a discount they
get, but the percentage is revealed by scratching off that
black stuff (what is that?) only after the purchase has been
totaled at the cash register. The store is required to reveal
(in the fine print) the distribution of discounts available.
Which of these probability assignments are legitimate?
10% off 20% off 30% off 50% off
a) 0.20 0.20 0.20 0.20
b) 0.50 0.30 0.20 0.10
c) 0.80 0.10 0.05 0.05
d) 0.75 0.25 0.25 -0.25
e) 1.00 0 0 0
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