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Stat 1 exam

stat exam

QuestionAnswer
What is the median of the following group of scores?: 1,2,2,3,4,4,4,6,8,10 4
When is the correlation coefficient zero? When there is no linear correlation
the invention of the correlation coefficient occurred as part of research being conducted for which ultimate purpose? Selective breeding of human beings (eugenics)
An education researcher collects data on how many students are on scholarship at various local colleges. The researcher then makes a frequency table to summarize the data. The researcher then makes a frequency table to summarize the data. He uses an Descriptive statistical method
Student theorizes performance on a statistics exam will be related to the number of hours she spent studying. This student will be required to use_ to test her theory Inferential statistics
Numerical variables are also called quantitative variables
A_ describes a particular score in terms of where it fits into the overall group of scores Z Score
The standard devation of a group of scores is 4 what is the variance? 16 standard deviation = Square root of variance
the most widely used way of describing the spread of a group of scores is the Standard deviation
The rule for calculating the mean is to add up all the scores in a sample and divide by the Number of scores
A graph that shows the pattern of the relation of two variables is a: Scatter Diagram
A survey of 15 executives were asked what they think is the most common mistake candidates make sure during job interviews. Six different mistakes were given. Which is the best for presenting the information? Histogram
The correlation between two variables that are totally unrelated would be: 0
If a correlation between variables A and B is found to be equal to -1.16: It is a miscalculation
In statistics, R is called: Pearson's correlation coeffecient
The direction of correlation is indicated by: Its sign( + or -)
A summary measure that is computed to describe a characteristic of an entire population is called A parameter
An important first step is assessing the relationship of two interval level variables is to look at a scatter plot
When extreme values are present in a set of data, which of the following descriptive summary measures are most appropriate: Interquartile range and median
Those methods involving the collection, presentation, and characterization of a set of data in order to properly describe the various features of that set of data are called Statistical Inference
Data on 1,500 students height were collected at a larger university in the East Coast. Thich of the following is the best chart for presenting the information? histogram
After inspecting all of 55,000 KG of meat stored at the Wurst company, it was found that 45,000 of the meat was spoiled Statistic or Parameter? Parameter
The subjects in which college students major. A)Nominal B)Ordinal C)Ratio D)Interval Nominal
The tempatures of eight different plastic Spheres? A)interval B)Nominal C)Ratio D)Ordinal Interval
THe sample of Spheres categorized from softest to hardest Which one Ordinal
The distance traveled in miles to 7 different swim meets are given below:10,24,40,52,68,68,90 find the median distance traveled A)68 miles B)52 miles C)50 miles D)40 miles 52 miles
Find the mode: 81,74,32,74,29,81 81,74
A statistical analyst obtains data about ankle injuries by examining a hospitals records from the past 3 years. A)Retrospective B)Prospective C)Cross-sectional D) None Retrospective
A researcher plans to obtain data by following those in cancer remission since January of 2002 A)Cross-sectional B)Retrospective C)Prosepective D)None of these retrospective
A market researcher selects 500 people from each of 10 cities. A) Random B) Cluster C) Convenience D)Systematic E)Stratified Cluster
49,34, and 48 students are selected from the sophmore, Junior, and Senior classes with 496,348, and 481 students respectively A)Convenience B)Random C)Stratified D)Cluster E)Systematic Stratified
A pollster uses a computer to generate 500 random numbers, then interviews the voters corresponding to those numbers. A) Convience B)Stratified C) Cluster D) Random E) Systematic Random
A sample of fish is taken from a lake to measure the effect of population from a nearby factory on the fish. A) observational B) Experimental Observational
A sample consists of every 49th student from a group of 496 students Systematic
Created by: nivekx7
 

 



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