Exam (elaborations)

StatiSticS teSt #5 - chapterS 9 & 10, unit #4 - StatS teSt, (actuaL) - teSt #3 - StatS, pSych StatS quiz 5, pSych StatS quiz 4, pSyc StatS quiz 3, teSt 3 quiz - StatS, ch 5 q'S, ch 6 queStionS Using the attached SPSS output, what is the p-val

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statistics test 5 chapters 9 10 unit 4 s
statistics test 5 chapters 9 10 unit 4
statistics test 5 chapters 9 10 unit
statistics test 5 chapters 9 10

Institution StatiSticS , unit #4 - S
Course StatiSticS , unit #4 - S

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StatiSticS teSt #5 - chapterS 9 &
10, unit #4 - StatS teSt, (actuaL) -
teSt #3 - StatS, pSych StatS quiz 5,
pSych StatS quiz 4, pSyc StatS
quiz 3, teSt 3 quiz - StatS, ch 5 q'S,
ch 6 queStionS

,Using the attached SPSS output, what is the p-value that tests the null hypothesis that the relationship
between eahtot and wrtot is zero? - correct answer-0-Correct answer-Using the attached SPSS output,
what is the correlation between eahtot and itn? - correct answer-0.476-Correct answer-Using the
attached SPSS output, what is the sample size? - correct answer-140-Correct answer-Which correlation
(i.e. between what two variables) is not significant using an alpha of 0.05? - correct answer-sefamily and
wrtot, with a p-value of 0.106-Correct answer-Which two variables have the strongest relationship?

Correlations SPSS output.pdf - correct answer-eahtot and itn of r = .416-Correct answer-If the correlation
is .50, what percent of variance in y is explained by x?

Please include two decimal points in your answer. - correct answer-25.00

r-square (the coefficient of determination) tells us the proportion of variance in one variable that is
explained by the other variable. The square of .50 is .25 and multiplying .25 by 100 tells us the percent of
variance in y that is explained by x.-Correct answer-If a correlation is .25, what percent of variance in y
can be explained by x?

Please include 2 decimal points in your answer. - correct answer-6.25

squaring .25 equals .0625, multiplying by 100 tells us that 6.25% of the variance in y is explained by x.-
Correct answer-If I want to find the association between a dichotomous variable and a variable
measured at the interval level, I would use what correlation?

a. phi

b. Peason

c. point biserial

d. Spearman - correct answer-point biserial

Point biserial correlations are between a dichotomous variable and an inverval/ratio variable-Correct
answer-What correlation is used to find the association between two interval/ratio scales.

a. Spearman

b. Pearson

c. phi

d. point biserial - correct answer-pearson

Pearson is used for the correlation between two interval/ratio variables.-Correct answer-A correlation
between .30 and .50 is generally considered ...

,a. a moderate relationship

b. a weak relationship

c. a strong relationship

d. an insignificant relationship - correct answer-a moderate relationship

According to Jacob Cohen, a moderate relationship is between .30 and .50.-Correct answer-Which of the
following is the null hypothesis when you use the correlation coefficient?

a. rho = 0

b. there is a relationship between the two variables

c. there is not a null hypothesis when you test the significance of r.

d. The correlation will not be negative - correct answer-rho=0

The null hypothesis is that the population correlation (i.e. rho) will be zero.-Correct answer-If you have a
small correlation, you will not need a large sample size to get a power of .80 - correct answer-false.

Small effect sizes require large sample to achieve a power of .80 or grater.-Correct answer-The range of
correlations are from -1.00 to +1.00. - correct answer-true-Correct answer-An assumption of the Pearson
Product Moment correlation is that the relationship between two variables is linear. - correct answer-
true-Correct answer-Which of the following statements is true about a negative correlation

a. It is not significant

b. It is not as important as positive relationships

c. As one variable increases, the other variable decreases

d. As one variable decreases, the other variable decreases. - correct answer-As one variable increases,
the other variable decreases

A negative correlation means that as one variable increases, the other variable will decrease.-Correct
answer-Using the following data, what is the slope? Round your answer to the nearest 3 decimal places.
Please keep your work because the next few questions use this same data.

xy

6.00 2.00

7.00 3.00

9.00 7.00

, 10.00 8.00 - correct answer-1.6-Correct answer-Using the following data, what is the intercept? Round
your answer to the nearest 3 decimal places. Please keep your work because the next few questions use
this same data.

xy

6.00 2.00

7.00 3.00

9.00 7.00

10.00 8.00 - correct answer--7.8-Correct answer-Using the following data, what is the standard error of
the estimate? Round your answer to the nearest 3 decimal places. Please keep your work because the
next few questions use this same data.

xy

6.00 2.00

7.00 3.00

9.00 7.00

10.00 8.00 - correct answer-0.447-Correct answer-Using the following data, what would be the value of y
when x equals zero? Round your answer to the nearest 1 decimal place. Please keep your work because
the next few questions use this same data.

xy

6.00 2.00

7.00 3.00

9.00 7.00

10.00 8.00 - correct answer--7.8-Correct answer-Using the following data, what would be beta? Round
your answer to the nearest 3 decimal places. Please keep your work because the next few questions use
this same data.

xy

6.00 2.00

7.00 3.00

9.00 7.00

10.00 8.00 - correct answer-0.992-Correct answer-Using the following data, what would be the Pearson
Product Moment Correlation (ususally simply referred to as the correlation)? Round your answer to the
nearest 3 decimal places.

xy

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Exam (elaborations)

StatiSticS teSt #5 - chapterS 9 & 10, unit #4 - StatS teSt, (actuaL) - teSt #3 - StatS, pSych StatS quiz 5, pSych StatS quiz 4, pSyc StatS quiz 3, teSt 3 quiz - StatS, ch 5 q'S, ch 6 queStionS Using the attached SPSS output, what is the p-val

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