A sample of 200 adults were asked \"What is your favorite flavor of ice cream?\"
ID: 3273756 • Letter: A
Question
A sample of 200 adults were asked "What is your favorite flavor of ice cream?" The percentages are shown in the pie chart below. How many of the adults chose strawberry? a. 17 b. 17 c. 34 d. None of these The variable, favorite flavor of ice cream, is a. Qualitative b. Quantitative c. Neither The mode of this distribution is a. Chocolate b. Vanilla c. Strawberry d. Other A researcher is interested in the average age of all college students in Louisiana. He takes a random sample of 400 college students in Louisiana and calculates an average age of 21. These 400 students is an example of a a. parameter b. population c. sample d. statistic The variable, number of pets in a student's household, is a. Qualitative b. Quantitative and discrete c. Quantitative and continuous d. None of the above For numbers 12 and 13, if P(E) = 0.25, P (F) = 0.60 and P (E and F) = 0.10. find P(E or F) = a. 0.95 b. 0.85 c. 0.75 d. 0.15 P (not F) = a. 0.25 b. 0.40 c. 0.60 d. 0.75Explanation / Answer
7) As there are a total of 200 adults, and 17% choose strawberry, therefore number of adults who choose strawberry would be computed as: = 0.17*200 = 34
Therefore c) 34 is the correct answer here.
8) Flavour os ice cream is a qualitative variable ( as it is not numerical )
Therefore a) qualitative is the correct answer here.
9) Mode of the distribution is Vanilla as highest percentage of people chose vanilla
Therefore b) Vanilla is the correct answer here.
10) 400 students is an example of sample
11) Number of pets is clearly numerical as it a number. Also it is discrete as their cannot be frational numbers here. Therefore b) is the correct answer here.
12) P(E) = 0.25, P(F) = 0.6 and P( E and F) = 0.1
Then by addition law of probability, P(E or F) = P(E) + P(F) - P(E and F) = 0.25 + 0.6 - 0.1 = 0.75
Therefore c) 0.75 is the correct answer here.
13) P( not F) = 1 - P(F) = 1 - 0.6 = 0.4
Therefore b) 0.4 is the correct answer here.