An e-commerce research company claims that at least 55% of graduate students have bought merchandise on-line. A consumer group is suspicious of the claim and thinks that the proportion is lower than 55%. A random sample of 160 graduate students show that only 85 students have ever done so. Is there enough evidence to show that the true proportion is lower than 55%? Conduct the test at 0.1 level of si
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. An e-commerce research company claims that at least 55% of graduate students have bought merchandise on-line. A consumer group is suspicious of the claim and thinks that the proportion is lower than 55%. A random sample of 160 graduate students show that only 85 students have ever done so. Is there enough evidence to show that the true proportion is lower than 55%? Conduct the test at 0.1 level of significance.
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