STATS 202 Final Exam Questions With Complete Solutions
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a _______ describes an individual by placing the individual into a category or group, such as male or female correct answer: qualitative variable
a _____ is a quantitative variable that has either a finite number of possible values or a countable number of possible values correct answer: discr...
STATS 202 Final Exam Questions
With Complete Solutions
a _______ describes an individual by placing the individual into a category or group, such as male or female correct answer: qualitative variable
a _____ is a quantitative variable that has either a finite number of possible values or a countable number of possible values correct answer: discrete variable
a _____ is a quantitative variable that has an infinite number of possible values that are not countable correct answer: continuous variable
a _____ is an explanatory variable that was not considered in study, but that affect the value of the response variable in the study correct answer: lurking variable
a ____ is one obtained by separating the population into homogeneous, non-overlapping groups called strata, and then obtaining a simple random sample from each stratum correct answer: stratified sample
a _____ is obtained by selecting every kth individual from the population correct answer: systematic sample a ____ experiment is one in which the experimental unit (or subject) does not know which treatment he or she is receiving correct answer: single-blind
a _____ experiment is one in which neither the experimental unit nor the researcher in contact with the experimental unit knows which treatment the experimental unit is receiving correct
answer: double-blind
the highest frequency occurs in the middle and frequencies tail off to the left and right of the middle is called correct answer: bell-shaped distribution
if the tail to the left of the peak is longer than the tail to the right of the peak then the data is considered correct answer: skewed left
the bank account numbers of the students in a class
a. qualitative b. quantitative correct answer: a. qualitative
the weights of cases loaded onto an airport conveyor belt a. qualitative b. quantitative correct answer: b. quantitative
the number of bottles of juice sold in a cafeteria during lunch a. discrete b. continuous correct answer: a. discrete
the weight of a player on the wrestling team a. discrete b. continuous correct answer: b. continuous
the personnel director at a large company would determine whether the company cafeteria is widely used by employees. she
calls each employee and asks them whether they usually bring their own lunch, eat at the company cafeteria, or go out for lunch
a. observational study b. experiment correct answer: a. observational study
a scientist was studying the effects of a new fertilizer on crop yield. she randomly assigned half of the plots on a farm to group
one and the remaining plots to group two. on the plots in group one, the new fertilizer was used for a year. on the plots in group two, the old fertilizer was used. at the end of the year, the average crop yield for the plots in group one was compared with
average crop yield for the plots in group two a. observational study b. experiment correct answer: b. experiment
every fifth adult entering an airport is checked for extra security screening. what sampling technique is used? a. systematic b. simple random c. cluster d. convenience e. stratified correct answer: a. systematic
at a local technical school, five auto repair classes are randomly selected and all of the students from each class are interviewed. what sampling technique is used? a. systematic
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