Measurements of height involve which kind of data?
A) nominal B) ordinal C) interval D) ratio
Q. 2A _________ of n experimental units is one selected from the population in such a way that every different sample of size n has an equal chance of selection.
A) systematic sample B) simple random sample
C) stratified random sample D) cluster sample
Q. 3For a set of data which contains extreme values, the best measure of a central location among the following is
the
A) mean. B) median. C) mode. D) midrange.
Q. 4If P(X) = 0.4 and P(Y) = 0.5, and if X and Y are mutually exclusive, find P(X or Y).
A) 0.5 B) 0.4 C) 0.9 D) 0.6
Q. 5A grocery store manager is interested in how long a customer waits, on average, to be served at the deli counter. He records the waiting time for a sample of 10 customers on each of 3 different days. Identify the data collection method.
A) survey B) designed experiment
C) published source D) observational study
Q. 6A type of data in which zero indicates the absence of a certain property is _______ data.
A) nominal B) ordinal C) interval D) ratio
Q. 7True or False: Results that are practically significant will always be statistically significant.
A) True B) False
Q. 8The numbers 40 and 44 are examples of
A) class marks. B) class boundaries. C) class limits. D) class intervals.
Q. 9One student is selected at random from a student body. Suppose the probability that this student is male is 0.5, and the probability that this student is working a part-time job is 0.7.
A) It cannot be determined whether these events are mutually exclusive.
B) These events male and working are not mutually exclusive.
C) These events male and working are mutually exclusive.
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