MCS Unit 1 Quiz Review

In a trial of weight loss programs, 21 subjects on the Atkins program lost an average (mean) of 15 lb after one year. There is a 3% chance of getting such results if the program has no effect. Are these results statistically significant? Do they have practical significance?

• Yes, the program is statistically significant because the results are unlikely to occur by chance; No, the program is not practically significant because the amount of weight loss is not large enough to be practical

• Yes, the program is statistically significant because the results are likely to occur by chance; No, the program is not practically significant because the amount of weight loss is not large enough to be practical

• No, the program is not statistically significant because the results are unlikely to occur by chance; Yes, the program is practically significant because the amount of weight loss is large enough to be practical

• Yes, the program is statistically significant because the results are unlikely to occur by chance; Yes, the program is practically significant because the amount of weight loss is large enough to be practical

In a study for dementia, 20 subjects recalled 2 more words on average after the medication was administered. It is found that there is about a 40% chance of getting such results with a medication that has no effect. Does the medication have statistical significance? How about practical significance?

• Yes, the program is statistically significant because the results are unlikely to occur by chance; No, the program is not practically significant because the amount of words recalled is not large enough to be practical

• No, the program is not statistically significant because the results are likely to occur by chance; No, the program is not practically significant because the amount of words recalled is not large enough to be practical

• No, the program is not statistically significant because the results are unlikely to occur by chance; Yes, the program is practically significant because the amount of words recalled is large enough to be practical

• Yes, the program is statistically significant because the results are unlikely to occur by chance; Yes, the program is practically significant because the amount of words recalled is large enough to be practical

A new blood pressure medication was administered and saw an average decrease by 3 mm Hg in both systolic and diastolic. It is found that there is a 5% chance of this happening if the medication was not effective. Are the results statistically significant? How about practically significant?

• Yes, the program is statistically significant because the results are unlikely to occur by chance; No, the program is not practically significant because the decrease in BP is not large enough to be practical

• No, the program is not statistically significant because the results are likely to occur by chance; Yes, the program is practically significant because the decrease in BP is large enough to be practical

• Yes, the program is statistically significant because the results are likely to occur by chance; No, the program is not practically significant because the decrease in BP is not large enough to be practical

• Yes, the program is statistically significant because the results are unlikely to occur by chance; Yes, the program is practically significant because the decrease in BP is large enough to be practical

The average salary of all assembly-line employees at a certain car manufacturer is $33,000. Choose the correct answer below.

• The value is a parameter because it describes some characteristic of a sample

• The value is a statistic because it describes some characteristic of a sample

• The value is a parameter because it describes some characteristic of a population

• The value is a statistic because it describes some characteristic of a population

The average late fee for 360 credit card holders was found to be $56.75. Choose the correct answer below.

• The value is a statistic because it describes some characteristic of a population

• The value is a statistic because it describes some characteristic of a sample

• The value is a parameter because it describes some characteristic of a population

• The value is a parameter because it describes some characteristic of a sample

In a study of all patients at a particular hospital, 15% were there for the flu. Choose the correct statement below.

• The value is a statistic because it describes a characteristic of a sample

• The value is a parameter because it describes a characteristic of a sample

• The value is a statistic because it describes a characteristic of a population

• The value is a parameter because it describes a characteristic of a population

State whether the data described below are discrete or continuous and why.

The number of ticket sales in a 5 day period

• The data are continuous because the data can take on any value in an interval

• The data are discrete because the data can take on any value in an interval

• The data are continuous because the data can only take on specific values

• The data are discrete because the data can only take on specific values

State whether the data described below are discrete or continuous and why.

Speed of the wind

• The data are discrete because the data can take on any value in an interval

• The data are continuous because the data can take on any value in an interval

• The data are discrete because the data can only take on specific values

• The data are continuous because the data can only take on specific values

State whether the data described below are discrete or continuous and why

Height of babies at birth

• The data are continuous because the data can take on any value in an interval

• The data are discrete because the data can take on any value in an interval

• The data are discrete because the data can take only specific values

• The data are continuous because the data can take only specific values

A university polled 500 of its students, randomly selecting 10 students enrolled in each degree program. Classify the sampling method.

• Simple Random Sample

• Stratified Sampling

• Cluster Sampling

• Systematic Sampling