The science of collecting, organizing, analyzing, and interpreting data in order
ID: 3300992 • Letter: T
Question
The science of collecting, organizing, analyzing, and interpreting data in order to make decisions is called _____. The _____ consists of all of the subjects being studied in statistics. Data that counts objects and takes on only whole number values is _____ while data that is measurable and can take on any value is _____. The process of _____ is used to reduce bias in a study. _____ statistics is used to make a prediction about the population based on samples and probability. As the evidence on the adverse effects of cigarette smoke grew, people tried many different ways to quit smoking. Some cheek people tried chewing tobacco. A small amount of tobacco was placed between the cheek and gum. Certain chemicals from the tobacco were absorbed into the bloodstream and gave the sensation of smoking cigarettes. This prompted studies on the adverse effects of smokeless tobacco. One study in particular used 40 university students as subjects. Twenty were given smokeless tobacco to chew, and twenty given a substance that looked and tasted like smokeless tobacco, but did not contain any of the harmful substances. The students were randomly assigned to one of the groups. The students' blood pressure and heart rate were measured before they started chewing and 20 minutes after they had been chewing. A significant increase in heart rate occurred in 82% of the group that chewed the smokeless tobacco. Answer the following questions based on the study cited above: What type of study was this (observational or experimental)? List some possible confounding variables. Was the stated statistic of 82% having an increased heart rate descriptive or inferential? Classify each variable as qualitative (categorical) or quantitative. a. Number of bicycles sold in 1 year by a large sporting goods store._____ b. Colors of baseball caps in a store. _____ c. Classification of children in a day-care center _____ (infant, toddler, preschool). d. Weights of fish caught in Lake George. _____Explanation / Answer
1. The science of conducting studies to collect, organize, summarize, analyze, and draw conclusions from data. --> Statistics
2. Consists of all subjects that are being studied --> Population
3.
Data that counts objects and takes on only whole number values is Discrete
Data that is measuable and can take on any value is Countinuous
4.
The process of Random Sampling is used to reduce bias in a study.
5.
Statistics is used to make a prediction about the population based on samples and probability - Inferential Statistics