Karissa and Angela are two friends who say they have no previous knowledge of statistics. They are going to take a placement test to see if they should start at the introductory level or not. The placement test is a multiple-choice test with 82 questions. Each question has 4 multiple-choice options with exactly one correct answer. What is the expected number (mean) of correct answers if a student were to randomly guess? (Do not round) What is the standard deviation for the number of correct answers if a student were to randomly guess? (Round to two decimal places) The usual number of correct answers, if a student were to randomly guess, would be to . (Round to the nearest whole number that would be within the interval.) What is the probability of getting 24 or more questions correct if you are randomly guessing? (Round to four decimal places.) What is the probability of getting 54 or more questions correct if you are randomly guessing? (Round to four decimal places.) Karissa got 24 questions correct. Angela got 54 questions correct. Is it reasonable to believe that Karissa had no prior knowledge of statistics? yes no Why or why not? Is it reasonable to believe that Angela had no prior knowledge of statistics? yes no Why or why not?
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.
Karissa and Angela are two friends who say they have no previous knowledge of statistics. They are going to take a placement test to see if they should start at the introductory level or not.
The placement test is a multiple-choice test with 82 questions. Each question has 4 multiple-choice options with exactly one correct answer.
What is the expected number (mean) of correct answers if a student were to randomly guess? (Do not round)
What is the standard deviation for the number of correct answers if a student were to randomly guess? (Round to two decimal places)
The usual number of correct answers, if a student were to randomly guess, would be to . (Round to the nearest whole number that would be within the interval.)
What is the
What is the probability of getting 54 or more questions correct if you are randomly guessing? (Round to four decimal places.)
Karissa got 24 questions correct.
Angela got 54 questions correct.
Is it reasonable to believe that Karissa had no prior knowledge of statistics?
- yes
- no
Why or why not?
Is it reasonable to believe that Angela had no prior knowledge of statistics?
- yes
- no
Why or why not?
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