Universal Studios Orlando contains the Wizarding World of Harry Potter - Diagon

Question

Universal Studios Orlando contains the Wizarding World of Harry Potter - Diagon Alley. Located in the heart of Diagon Alley is Ollivanders, where young wizards come in search of their most essential wizarding supply: their wand. Of interest is to determine the mean age of all people who have purchased wands from Ollivanders so far in 2015. 8. Consider the information presented in the above paragraph. What type of characteristic is mean age of all people who have purchased wands from Ollivanders so far in 2015? Categorical variable Discrete quantitative variable Continuous quantitative variable Constant 9. For those people who purchased a wand at Ollivanders so far in 2015, it is of interest to record the number of wands they considered before they chose the one they purchased. What type of characteristic is the number of wands considered before they chose the one they purchased? Categorical variable Discrete quantitative variable Continuous quantitative variable Constant 10. Consider the information presented in the paragraph above question 8. Suppose Ollivanders keeps information on every wand they sell and they report that among all people who have purchased wands from Ollivanders so far in 2015, 32% are from other countries. In this scenario, is 32% an example of a parameter or a statistic? Parameter Statistic 11. Suppose a sample of 200 people who have purchased wands from Ollivanders so far in 2015 is selected: each was asked his or her age and how long they were visiting Universal Orlando, among other questions. The sample was purposely selected such that everyone in the sample was from the United States: people from other countries were not included in the sample. In this scenario, w hat type of bias could this cause? Selection bias Response bias Nonresponse bias Confounding bias

Explanation / Answer

Ans:

1)Mean age of all people ho purchased wand in 2015 is constant(as it is population parameter)

Option D is correct.

2)Discrete quantitave variable

Option B is correct.

3)Parameter(as,32% is population proportion of people ho are from other country.)

Option A is correct.

4)Selection bias(as people from other countries were not included in the sample)

Option A is correct.

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