Question 1 1 pts One item on a questionnaire asks, “How many siblings (brothers and sisters) did you have when you were a child?” A researcher computes the mean, the median, and the mode for a set of

  

Question 1 1 pts One item on a questionnaire asks, “How many siblings (brothers and sisters) did you have when you were a child?” A researcher computes the mean, the median, and the mode for a set of n = 50 responses to this question. Which of the following statements accurately describes the measures of central tendency?Because the scores are all whole numbers, the mean will be a whole number. Because the scores are all whole numbers, the median will be a whole number. Because the scores are all whole numbers, the mode will be a whole number.  All of the other options are correct descriptions.Question 2 1 pts The average (mean) verbal SAT score for the entire class of entering freshmen is 530. However, if you select a sample of 20 freshmen and compute their average verbal SAT score, you probably will not get exactly 530. What statistical concept is used to explain the commonly occurring difference that exists between a sample mean and the corresponding population mean?statistical error sampling error effect size error parametric error3.Question 3 1 pts The final step of hypothesis testing is to __________. Group of answer choices make a  decision to reject or retain the alternate hypothesis make a  decision to reject or retain the null hypothesis collect the sample data and compute the test statistic prove that the null hypothesis is falseQuestion 4 1 pts For a population with its mean = 80 and its standard deviation  = 12, what is the z-score corresponding to X = 98? .5 0 1 1.5Question 5 1 pts Probability values are always __________. greater than or equal to 0, but less than or equal to 1 between -1.0 and +1.0 between -1 and 0 expressed in percentages, between 0% and 100%Question 6 For which of the following situations would a two-sample dependent t test most likely be employed?comparing verbal skills for girls versus boys at age 5 years comparing self-esteem for junior high school students who participate in school athletics versus those who do not comparing problem-solving skills for biology majors versus art majors at UT Permian Basin comparing pain tolerance before and after taking a new pain medication Question 7 1 pts In a hypothesis test, an extreme t-score value, like t = +3 or t = +4, __________. is probably in the critical region (or in the region of rejectionmeans that you should probably reject the null hypothesis is probably strong evidence of a statistically significant effect All of the above options are correct.Question 8 1 pts The general manufacturer of the automobile each student drove was recorded by the statistics professor.  The resulting frequencies were:   Dodge = 8; Ford = 12; General Motors =  17; Toyota = 21;  Volvo = 4; and “other” = 14. If the resulting distribution of the number of times each auto type each student drove was represented with a graph, what kind of graph would be most  appropriate? Group of answer choices a histogram a polygon a histogram or a polygon a bar graphQuestion 9 1 pts If a repeated-measures study shows a significant difference between two treatment means with  = .01, then you can __________. Group of answer choices reject the null hypothesis accept the null hypothesis retain the null hypothesis assert that the alternative hypothesis is falseQuestion 10 1 pts A Pearson correlation of r = -1.00 between X and Y indicates __________. Group of answer choices each time X increases, there is a perfectly predictable decrease in Y every change in X is related to a corresponding change in Y every decrease in Y is related to a corresponding  increase in X Each of the above three alternatives is correct with a correlation of -1.00.Question 11 1 ptsHow many individual scores are in the frequency distribution below?X f 5 1 4 1 3 4 2 2Group of answer choices N=5 N=8 N=16 N=26Question 12 1 pts In a study evaluating the effectiveness of a new medication designed to control high blood pressure, one sample of individuals is given the medicine and a second sample is given an inactive placebo. Blood pressure is measured for each individual. For this study, what is the dependent variable? Group of answer choices the medication the placebo blood pressure the individuals given the medication