statistics
Tell if each variable is continuous or discrete. a. Tonnage carried by an oil tanker at sea. b. Wind velocity at 7 o’clock this morning. c. Number of text messages you received yesterday...
Tell if each variable is continuous or discrete. a. Tonnage carried by an oil tanker at sea. b. Wind velocity at 7 o’clock this morning. c. Number of text messages you received yesterday...
Which data type (categorical, numerical) is each of the following and what is its level of measurement (nominal, ordinal, interval, ratio)? a. Your current credit card balance. b. Your...
Which data would be most suitable for a pie chart? Why not the others? a. Presidential vote in the last election by party (Democratic, Republican, Other). b. Retail prices of six major...
Which statement is false? Explain. a. Sampling error can be reduced by using appropriate data coding. b. Selection bias means that respondents are not typical of the target population...
Which statement is correct? Why not the others? a. Likert scales are interval if scale distances are meaningful. b. Cross-sectional data are measured over time. c. A census is always...
Which one of the following is true? Why not the others? a. Histograms are useful for visualizing correlations. b. Pyramid charts are generally preferred to bar charts. c. A correlation...
Which of the following is not a reason for sampling? Explain. a. The destructive nature of some tests. b. High cost of studying the entire population. c. The expense of obtaining...
To choose a sample of 12 students from a statistics class of 36 students, which type of sample (simple random, systematic, cluster, convenience, snowball, etc.) is each of these? a. Picking...
Which data type (categorical, numerical) is each of the following and what is its level of measurement (nominal, ordinal, interval, ratio)? a. Your current credit card balance. b. Your...
Which type of statistic (descriptive, inferential) is each of the following? a. Estimating the default rate on all U.S. mortgages from a random sample of 500 loans. b...
Tell if each variable is continuous or discrete. a. Tonnage carried by an oil tanker at sea. b. Wind velocity at 7 o’clock this morning. c. Number of text...
Driving without a seat belt is not risky. I’ve done it for 25 years without an accident.” This best illustrates which fallacy? a. Unconscious bias. b. Conclusion...
Fidelity investments would like feedback from its customers about its new stock trading platform. They assign a unique number to every customer mail a survey to every 100th customer in the list. Which...
Fidelity investments would like feedback from its customers about its new stock trading platform. They assign a unique number to every customer mail a survey to every 100th customer in the list. ...
A survey asks you to denote your political party affiliation by entering (1) for Republican, (2) for Democrat, (3) for independent, and (4) for not registered voter. Is this a nominal, ordinal, interval,...
The length of time it takes the winner of a marathon to cross the finish line is considered a measurement of nominal, ordinal, interval or ratio and why