Suppose you have an experiment where you flip a coin three times. You then count the number of heads. a.) State the random variable. b.) Write the probability distribution for the number of heads. c.) Draw a histogram for the number of heads. d.) Find the mean number of heads. e.) Find the variance for the number of heads. f.) Find the standard deviation for the number of heads. g.) Find the probability of having two or more number of heads. h.) Is it unusual to have the three flips result in two heads? Why or why no
True or False: A boxplot is a useful way of examining the distribution of a dichotomous variable.
True or False: A boxplot is a useful way of examining the distribution of a dichotomous variable. (I answered false because boxplot and histograms are for continuous variables not categorical variables that often uses bar graphs where each category gets its own bar. Is this right or wrong?)
The sample space S is all the ordered pairs of two whole numbers, the first from one to three and the second from one to four. (Example: (1,4)).
The sample space S is all the ordered pairs of two whole numbers, the first from one to three and the second from one to four. (Example: (1,4)). a. S=___________ let event A= the sum is even and event B= the first number is prime. b. A=_______, B=_________ c. P(A)=_______, P(B)=___________ d. A AND B=__________, A OR B =________ e. P(A AND B)=_______, P( A OR B)=_________ f. B’=________, P(B’)=_________ g. P(A) + P(A’)=_______ h. P(AB)=_____, P(BA)=______; ads the probabilities equal?
The commuter trains on the Red Line for the Regional Transit Authority (RTA) in Cleveland, OH, have a waiting time during peak rush hour periods of…
The commuter trains on the Red Line for the Regional Transit Authority (RTA) in Cleveland, OH, have a waiting time during peak rush hour periods of eight minutes (“2012 annual report,” 2012). a.) State the random variable. b.) Find the height of this uniform distribution. c.) Find the probability of waiting between four and five minutes . d.) Find the probability of waiting between three and eight minutes . e.) Find the probability of waiting five minutes exactly
A survey of 200 adults in the U. found that 76% regularly wear seat belts while driving. True or false: 76% is a parameter. True or false:
1. A survey of 200 adults in the U.S. found that 76% regularly wear seat belts while driving. True or false: 76% is a parameter. 2. True or false: The checking account numbers of customers at a bank represent quantitative data. 3. Determine whether the quantitative variable is continuous or discrete. The time (in minutes) required for a student. 4. Define the terms: statistic and parameter. Answer the following question based on the above bar graph. 5. Which class has the highest frequency? lowest frequency? 6. What percent of the people has an age at most 33 years old? 7. What percent of the […]
