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mathematics
using interpreting statistics

Questions and Answers of Using Interpreting Statistics

Use this data set: 13, 18, and 11 to find the following:ΣX/N =
Use this data set: 13, 18, and 11 to find the following:ΣX2
Use this data set: 13, 18, and 11 to find the following:ΣX
Use this data set: 8, 9, 5, 4, 7, and 8. Find the following:ΣX − 1
Use this data set: 8, 9, 5, 4, 7, and 8. Find the following:ΣX2 =
Use this data set: 8, 9, 5, 4, 7, and 8. Find the following:ΣX
Use this data set: 8, 9, 5, 4, 7, and 8. Find the following:N
A college president wants to know what the average quantitative SAT is for the first-year class at her college. She calls the registrar and the registrar accesses the database for the entire
Every 10 years, the United States Census Bureau attempts to collect information from all Americans. Assuming that they are successful, would it be a statistic or a parameter if the Census Bureau
A political pollster calls 2,000 registered American voters and finds out whether they plan to vote for the Democratic or Republican candidate in an upcoming election. From this she predicts the
A college dean wanted to find out which students were smarter: those seeking liberal arts degrees (like English or psychology) or those seeking professional degrees (like nursing, business, or
A person’s depression level is measured on a 20-item inventory where each item is a true/false item and is meant to measure depression. Each item endorsed in the “depressed” direction adds 1
If a person reads books for pleasure, he or she is classified as a “1”; if a person doesn’t read books for pleasure, he or she is classified as “0.” Whether or not a person reads books for
A person’s knowledge of English grammar is measured by a 50-item multiple choice test. Each correct answer is worth 2 points, so scores can range from 0 to 100. English grammar knowledge is being
A housing developer advertises her houses as being fully carpeted (2), partially carpeted (1), or not carpeted (0). Amount of carpeting is measured at what level?
A nurse researcher measures how many minutes patients must wait before being seen by the triage nurse after they enter an emergency room. Wait time is measured at what level?
The same college asks students to submit their SAT scores, but only on the math subtest. Subtest scores on the SAT range from a low of 200 to a high of 800, with 500 representing an average score.
The admissions committee at a college does not distinguish between different types of high school extracurricular activities. As far as it is concerned, being a member of the tiddlywinks club is
The owner of an automobile shipping company classifies cars in terms of size. If a car is a subcompact, she assigns it the value of 1. A compact car gets a 2, a mid size car a 3, and a full-size car
A social worker obtains the suicide rates for students at colleges in the United States. If the college has a suicide rate that is below average, he classifies it as −1. If the suicide rate is
A meteorologist classifies cities in the United States in terms of winter weather: “dreary” (0) or “not dreary” (1). Type of winter weather (0 vs. 1) is measured at what level of measurement?
A neuroscientist believes that proteins form plaques in the brain that cause Alzheimer’s disease. He gets a sample of older adults, measures the nanograms/liter of protein in spinal fluid, and
A political scientist is curious as to what influences voting behavior on taxes for school districts. She obtains a sample of voters and divides them, randomly, into three groups. One group serves as
A consumer behavior researcher is curious as to whether, in terms of the monetary value of Christmas presents received, it makes a difference if a child is naughty or nice. She has parents classify
An economist believed that as nations become wealthier, they produce more greenhouse gases. He took a country and found both its gross domestic product (GDP) and the total tons of CO2 emissions for
A personality psychologist has kindergarten teachers use an empathy scale that ranges from 0 (not at all empathetic) to 100 (extremely high levels of empathy) to rate their students. Thirteen years
Ever notice that some college students buy all the books for class, complete all the readings, do all the homework, and so on? These students usually end up with better grades as well. An education
Some football players put streaks of black paint under their eyes because they believe that it helps them see better in sunny conditions and react more quickly. A sensory psychologist wants to see if
The local police department has come to a criminologist to help them evaluate a new type of disposable, plastic handcuffs. They are just as effective as metal handcuffs in terms of immobilizing
If one does round as one goes, carry at least ____ decimal places.
According to the American Psychological Association, final results should be rounded to ____ decimal places.
The letter we use as an abbreviation for a dependent variable is ____. The abbreviation for the number of cases in a group is ____. The symbol for adding up a group of scores is ____, the uppercase
If a summary statement is used to describe a group of cases, it is a ____ statistic; if it is used to draw a conclusion about the larger population, it is an ____ statistic.
We use ____ letters as abbreviations for sample values and ____ letters as abbreviations for population values.
A number characterizing a sample is called a ____; a number characterizing a population is called a ____.
A ____ is the larger group of cases that a researcher is interested in studying.
Proportions can be found for ____-level numbers.
Interval-level numbers have an ____ zero point and ratio-level numbers have a ____ zero point.
Because interval-level numbers have ____, we can meaningfully speak of distance between two scores.
____-level numbers contain information about same/different and direction.
Nominal-level numbers contain information about ____.
The mnemonic to help remember, in order, the four levels of measurement is ____.
A ratio-level number contains ____ information than a nominal-level number.
The mnemonic iced stands for ____.
Though a quasi-experimental design looks like an ____ design, it is really a ____ design.
In a quasi-experimental design, cases are classified into ____ based on characteristics they already possess.
Experimental designs allow one to draw a conclusion about ____.
The variable where the effect is measured in an experimental design is called the ____.
In an experimental design, the ____ variable is manipulated or controlled by the experimenter.
____ is the hallmark of an experimental design.
A third variable that could be the real cause of an apparent relationship between X and Y in correlational research is called ____.
If two variables, X and Y, are found to be related in a correlational design, the three possible explanations for the relationship are: (a) ____, (b) ____, (c) ____.
In a correlational design, the two variables are simply measured; they are not ____ by the experimenter.
The objects being studied by a researcher are called ____.
The characteristics measured by a researcher are called ____.
Statistics ____ data in order to answer questions.

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