# The essay geekGroup of answer choices sample population statistic sample population sample statistic parameterQuestion 15 1 pts A Pears

a researcher typically examines data using a __________. Group of answer choices sample population statistic sample population sample statistic parameterQuestion 15 1 pts A Pearson correlation of r = .85 indicates that a scatter plot of the data would show __________. Group of answer choices points clustered close to a regression line that slopes up to the right points clustered close to a regression line that slopes down to the right points widely scattered around a regression line that slopes up to the right points widely scattered around a regression line that slopes down to the rightQuestion 16 1 pts A researcher might be interested in determining whether changes in social status are accompanied by changes in educational level. Such researchers are attempting to discover whether there is a(an) ___________ between two or more variables. Group of answer choices association relationship correlation Each of the choices a through c are correct.Question 17 1 pts A researcher reports that there is a significant difference between two treatments at the .05 level of significance (alpha is .05). This means that __________. Group of answer choices if the researcher repeated the experiment there is a 95% chance that the same decision would be reached the difference obtained in the experiment is at least 5% larger than the standard error there is a 5% probability (or less) that the difference occurred simply by chance without any treatment effect the average score for one treatment is at least 5% higher than the average score for the other treatmentQuestion 18 1 pts In general increasing the alpha level (for example from .01 to .05) will __________. Group of answer choices increase the likelihood of rejecting the null hypothesis decrease the likelihood of rejecting the null hypothesis increase the standard error decrease the standard errorQuestion 19 1 pts What is the shape of the distribution for the following set of scores: 1 1 2 2 2 2 2 2 3 3 4 5 6 13 25 Group of answer choices symmetrical positively skewed negatively skewed normally distributedQuestion 20 1 pts An introductory statistics class has 9 freshman males 15 freshman females 8 sophomore males and 12 sophomore females. What is the probability of randomly selecting a male from this group? Group of answer choices 9/24 or p = .375 8/20 or p = .4 17/20 or p = .85 17/44 or p = .386Question 21 1 pts What is the mode for the following set of scores: : 1 4 6 17 4 2 3 12 7 5 9 10 3 3 6 Group of answer choices 3 4 6 6.5Question 22 1 pts The results of an independent-measures research study are reported as t(35) = 2.12 p > .05. What statistical decision was made? Group of answer choices The researcher failed to reject the null hypothesis. The null hypothesis was rejected. There was a marginally significant effect of the treatment The probability of a Type I error or alpha error is equal to -2.12.Question 23 1 pts For the past 20 years the average high temperature on April 15th has been 82 degrees (Fahrenheit) with a standard deviation of 4 degrees. This year the high temperature was 92 degrees on April 15th . Based on this information this year’s temperature on April 15th was ______________. Group of answer choices a little above average far above average above average but it is impossible to describe how much above average There is not enough information to compare last year with the average.Question 24 1 pts Which of the following research situations is most likely to use an independent two-sample t test design? Group of answer choices Evaluate the effectiveness of a relaxation program for adult insomniacs by measuring how much time is spent sleeping before being taught relaxation training and again after 60 days of relaxation. Evaluate the difference in quantitative skills between 7th grade males versus 7th grade females. Evaluate the effectiveness of an arthritis medication by comparing pain levels in individuals before and after the medication. Evaluate the height of children born prematurely when they become two years old and again when they reach three years old.Question 25 1 pts The power of a statistical test is the probability of __________. Group of answer choices correctly rejecting a false null hypothesis proving a true null hypothesis correctly rejecting a false alternate hypothesis proving a false null hypothesisQuestion 26 1 pts A researcher is curious about the average IQ of registered voters in the state of Texas. The entire group of registered voters in Texas is an example of a __________. Group of answer choices statistic population sample parameterQuestion 27 1 pts Which of the following research situations is most likely to use a two sample independent-measures design? Group of answer choices Evaluate the effectiveness of a pain reliever by measuring how much pain is reduced after taking the medication. Evaluate the effectiveness of a cholesterol medication by comparing cholesterol levels before and after taking the medication.Evaluate the difference in self-esteem between student athletes and non-athletes. Evaluate the development of verbal skills between age 2 years and age 3 years for a sample of girls.Question 28 1 ptsThe critical boundaries for a two-tailed one sample z test are z = +1.96 and 1.96. If the calculated z-score for the sample data is z = 1.8 then what is the correct statistical decision? Group of answer choicesreject the alternate hypothesisreject the null hypothesisfail to reject the alternate hypothesisretain the null hypothesis Feb 24 2021