Info
Warning
Danger

Study Resources (Statistics)

  52. The chi square is a a. parametric test of mean differences b. a non-parametric test of frequency differences c. a parametric test of frequency differences d. an interval test of rank differences   53. Whenever the chi square is applied to interval data, the resulting value will be a. inflated b. lowered c. the same as when applied to.
2 Views
View Answer
B: Multiple Choice Items 1. The major goal of correlational research is to a. establish cause-and-effect relationships b. analyze the effects of an actively manipulated independent variable c. evaluate the results of experimental research d. make better-than-chance predictions 2. The higher the correlation between X and Y, then a. the higher the probability of having isolated the.
10 Views
View Answer
  124. A researcher has computed two significant Pearson r values from independent random samples. Sample A, 171 subjects, produced an r of .75 and Sample B, 175 subjects, produced an r of .60. Do the two sample correlations represent a common population correlation? A researcher is interested in whether a correlation exists between Alcohol.
3 Views
View Answer
    64. Whenever a correlation coefficient deviates significantly from zero, then a. it may or may not be used for predictions, depending on its size b. it may be used to establish totally accurate predictions c. it may not be used for predictions d. it may be used for establishing better-than-chance predictions, regardless of its size 65..
1 Views
View Answer
    21. When a relationship is inverse it means that the correlation must be a. non-significant b. non-linear c. significant d. negative 22. For the Pearson r, when Ho is rejected, it means that a. the correlation is positive b. the correlation is negative c. the correlation is significant d. none of these 23. The Pearson r may be used to.
3 Views
View Answer
    41. When doing an F ratio, subtracting the constant, 1, from the total number of sample groups yields the a. alpha error b. between degrees of freedom c. within degrees of freedom d. total degrees of freedom 205 42. Dividing the sum of squares (SS) by the degrees of freedom (df), yields the a. F ratio b. alpha error c..
2 Views
View Answer
  D: For the following questions, calculate the values. For questions 86 through 94 use the data on the following page: A researcher is interested in establishing whether memory is a function of both IQ and time of testing. A random sample of 40 university students was selected and each student was given an IQ.
1 Views
View Answer
  D. For the following questions, calculate the values. 84. Calculate the chi square on the following nominal data. CATEGORIES A B C D E fo 30 20 20 15 15 85. Calculate a chi square on the following nominal data. CATEGORIES A B C fo 35 25 10 For questions 86 through 91, use the following: Hypothesis: Police citations for.
3 Views
View Answer
    41. When a correlation value among three or more interval-data variables is required, then the appropriate statistical test is a. the multiple R b. the Pearson r c. the Spearman rs d. the multi-factor V 42. In order to use the multiple R, a. there must be at least three internal correlations b. at least four variables must.
2 Views
View Answer
    11. The major reason for using the correlational techniques is to a. make cause-and-effect statements b. make better-than-chance predictions c. identify a specific percentile d. establish a significant difference 12. On a scatter plot, the ordinate is used to represent a. the scores on the Y measure b. the scores on the X measure c. the frequency of.
6 Views
View Answer
    51. In a four-variable correlation, when two variables are held constant, while examining the remaining relationship between the other two, the technique is referred to as a. a multiple R b. a first-order partial c. a higher-order partial d. none of these 52. When all the points in a scatter plot lie directly on the.
1 Views
View Answer
B: Multiple Choice Items 1. A maximum linear correlation is expressed as a. 100% b. 99 c. +10.00 d. +1.00 2. The more a correlation deviates from zero, a. the more it is certain to be positive in sign b. the more it is certain to be negative in sign c. the more it is certain that the measured.
7 Views
View Answer
    11. When the chi square fo's deviate significantly from the fe's, then a. the independent rule has been violated b. the data are not nominal c. the chi square cannot be calculated d. null is rejected 12. With chi square, the more categories there are a. the fewer the degrees of freedom b. the greater the degrees.
5 Views
View Answer
  A researcher was interested in studying the possible deterrent effect of sentencing. A sample of 12 recidivists was compared with another sample of 12 who had stayed clean. Both groups had been convicted of distributing drugs and both groups had served time. For each subject the length of the previous.
3 Views
View Answer
B: Multiple Choice Items 1. When measuring individuals with the nominal scale, the key question is, a. how much of the given trait does the individual possess? b. does individual A possess more of the given trait than individual B? c. does the individual possess or not possess the trait? d. all of these are.
9 Views
View Answer
  78. When analyzing research data via the chi square, the independent variable should be placed in the rows. 79. Chi square may only be used for the analysis of post-facto research data. 80. Correlations may never be established when the data form is nominal. 81. The coefficient of contingency (C) demands that there be.
1 Views
View Answer
    54. When both sets of measures are in ordinal form, the appropriate correlational technique should be a. the Pearson r b. the t test c. the Spearman r d. the coefficient of determination 55. When one set of measures is in interval form, and the other in ordinal, then the appropriate correlational technique should be a. the Pearson.
1 Views
View Answer
    78. The partial correlation may never be used, unless more than two variables are involved. 79. The multiple R is used to assess the strength of the combined correlations among three or more variables. 80. A first-order partial correlation assesses the strength of the relationship between two variables, with the effects of a.
1 Views
View Answer
    31. The effect of the Yates correction on the chi square value is that chi square is a. slightly decreased b. slightly increased c. greatly increased d. none of these, since Yates does not influence the chi square value 224 32. When Yates is applied, the likelihood of obtaining a significant chi square is a. slightly decreased b. slightly.
2 Views
View Answer
  68. Because of the independence restriction, the McNemar test cannot be used on dependent samples. 69. As long as the data are in nominal form, the McNemar test may be applied to results from matched-subjects' designs. 70. When chi square equals zero, there is a failure to reject Ho 71. In order to.
2 Views
View Answer
  For questions 28 through 33 use the following. A researcher selects a random sample of college students and measures them on both the number of hours spent watching TV and grade-point average. The results were as follows: Subject # Hours of TV GPA X Y 1 50 1.90 2 20 2.20 3 19 2.40 4 10 3.00 5 7 2.90 6.
2 Views
View Answer
  107. For the following ranks, calculate the Spearman rs R1 R2 4.0 5 8.5 4 6.0 3 1.0 1 2.5 2 2.5 6 6.0 8 8.5 7 6.0 9 10.0 10 108. Should Ho be rejected or accepted? 109. If rejected, state the significance level. A researcher wishes to test the hypothesis that there is a correlation between IQ and math ability. A random sample.
1 Views
View Answer
  For questions 114 through 119 use the following: A researcher wishes to find out whether there is a dependable relationship between the severity of earthquakes and temperature for the 7 days immediately preceding the quake. A sample of 10 measured earthquakes was randomly selected from those recorded since 1965. For each area both the.
1 Views
View Answer
  D: For the following questions, calculate the values. Questions 91 - 93 will be based on the following: A group of 10 subjects was given a personality test. Among the traits measured on the test were Orderliness and Social Conformity. The scores were as follows: Subject # Orderliness Social Conformity 1. 9 11 2. 6 8 3..
2 Views
View Answer
B: Multiple Choice Items 1. The F ratio was developed by a. William Sealy Gossett b. Sir Ronald Fisher c. Karl Pearson d. Sir Bryant McKenna 2. The F ratio may be used to assess differences between (among) a. two sample means b. three sample means c. four sample means d. all of these 3. Analysis of experimental data by the.
5 Views
View Answer
    11. The alternative hypothesis for the F ratio is that the sample means a. represent a single population b. represent completely different populations c. do not all represent a single population d. none of these 12. When the distribution of raw scores within a sample forms a leptokurtic shape, then a. the variance within the sample is.
5 Views
View Answer