Among 500 people at the concert, a survey of 35 found 28% found it too loud. What is the population and what is the sample?
Among 500 people at the concert, a survey of 35 found 28% found it too loud. What is the population and what is the sample?
Population: 500 at that concert; Sample: the 28% who found it too loud
Population: all concert goers; Sample: the 28% who found it too loud
Population: 500 at that concert; Sample: the 35 in the survey
Population: all concert goers; Sample: the 500 at that concert
Question 2(CO 1) In asking all 349 second graders in a school district, it is found that on average, these second graders have 2.5 pets. Is this number a parameter or a statistic and why?
Parameter as it represents the population
Statistic as it represents the sample
Parameter as it represents the sample
Statistic as it represents the population
Question 3(CO 1) Classify the data of the top grossing movies for 2017.
Classical
Qualitative
Quantitative
Statistics
Question 4(CO 1) The data set that lists a company’s competitors and their locations would be classified as what type of data?
Ordinal
Nominal
Ratio
Interval
Question 5(CO 1) A data set that includes the shows on a station during the day would be classified as what type of data?
Ratio
Interval
Ordinal
Nominal
Question 6(CO 1) What type of data collection might be best to estimate whether a new medicine is more effective in curing the common cold than aspirin?
Survey
Observational
Experiment
Simulation
Question 7(CO 1) What type of data collection might be best to study how many books students bring into the media center during finals week?
Survey
Simulation
Experiment
Observational
Question 8(CO 1) You need to study the satisfaction of customers of a specific restaurant. You decide to order food and talk to those customers sitting next to you. This would most closely describe which type of sampling technique?
Convenience
Stratified
Systematic
Random
Question 9 (CO 2) Which of the following graphs would be a dot plot?
Question 10(CO 1) In a normally distributed data set of how long customers stay in your store, the mean is 44.8 minutes and the standard deviation is 2.6 minutes. Within what range would you expect 95% of your customers to stay in your store?
42.2-47.4
39.6-50.0
37.0-52.6
2.6-44.8
Empirical rule
Question 11(CO 1) Which of the following graphs would be considered left skewed?
Question 12(CO 1) In a normally distributed data set with a mean of 22 and a standard deviation of 4.1, what percentage of the data would be between 17.9 and 26.1?
68% based on the histogram
99.7% based on the Empirical Rule
95% based on the Empirical Rule
68% based on the Empirical Rule
Empirical rule
Question 13(CO 1) Which of the following would be the standard deviation for this sample data set: 5, 7, 3, 9, 2, 4, 4, 6, 5, 9, 3?
5.18
2.36
2.59
2.25
Question 14(CO 1) What would be the mean of this data set: 8, 9, 7, 508, 7, 1, 5, 3, 4?
57.0
61.3
5.7
55.2
Question 15(CO 1) A pharmaceutical company wants to determine if its new medicine helps heal bruises more quickly than not treating the bruise. What type of study would be best suited to make this determination?
Observational
Survey
Simulation
Experimental
Question 16(CO 1) To gather information on customer satisfaction, a researcher goes into several stores and interviews randomly selected customers. This sampling technique is called:
Cluster
Random
Convenience
Stratified
Question 17(CO 1) What is the standard deviation and its meaning in the sample of customer ages? 48, 76, 30, 39, 51, 40, 63, 66, 27
15.8 which means that many of the ages will be within half of this value of the average age
15.8 which means that many of the ages will be around this value
16.8 which means that many of the ages will be around the square of this value
16.8 which means that many of the ages will be within this value of the average age
Question 18(CO 1) What is the mode of the following data set?
2, 2, 3, 3, 3, 4, 4, 4, 5, 6, 7, 7, 8
3
2, 4, 5, and 7
2
3 and 4
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