Module 6
CC scored an 90 on Prof A’s exam while GG scored an 88 on Prof B’s exam. Both CC and GG have a z score of 3, who scored better on their exam?
Who is CC and GG?
A subset of individuals, scores. or observations taken from a population that is actually studied by the researcher.
What is a sample?
Researcher concludes that there is no difference in (dependent variable) between (independent variables), when in reality there is a difference.
What is a type II error?
The symbol for sample size.
What is n?
The entire group of individuals, scores, or observations that a researcher is interested in studying.
What is a population?
The probability rule when looking at the area below a positive z- score.
What is column b + 50?
The basis for inferential statistics. The distribution of sample means approaches a normal distribution when n is large.
What is the Central Limit Theorem?
A sociologist expects participants’ evaluation of a job applicant’s capability will differ depending on gender and whether the applicant is described as thin or heavy. Forty participants are asked to imagine themselves in a hiring capacity and to read a job application, resume, and a personal recommendation for an applicant applying for an accounting position. There are four experimental conditions: 1) gender of applicant: male or female, 2) weight: thin or heavy. After reviewing the materials, participants evaluate the applicant’s capability on a scale of 1 (not very capable) to 7 (very capable).
Identify the type of error if a true difference does not exist.
What is a Type I error?
The symbol for the Estimate Standard Error of the Mean.
What is SX?
Researcher concludes that there is a difference in (dependent variable) between (independent variables), when in reality there is no difference.
What is a type I error?
Steps for solving for probability.
What is step 1: compute z score of raw score, step2: locate % in table A, step3: determine rule of probability, and step 4: solve?
The probability that population mean falls within the range of mean values. There will be a lower value and upper value.
What is Confidence Interval?
Difference between independent sample means t-test and dependent sample means t-test.
What is two difference sample groups vs. one sample group at two different times?
The symbol for the standard deviation for the difference between before/after:
What is SD?
A sociologist expects participants’ evaluation of a job applicant’s capability will differ depending on gender and whether the applicant is described as thin or heavy. Forty participants are asked to imagine themselves in a hiring capacity and to read a job application, resume, and a personal recommendation for an applicant applying for an accounting position. There are four experimental conditions: 1) gender of applicant: male or female, 2) weight: thin or heavy. After reviewing the materials, participants evaluate the applicant’s capability on a scale of 1 (not very capable) to 7 (very capable). The results of the study are contrary to expectations. No significant differences are detected.
Identify the independent variables and the levels and the dependent variable.
What is Gender: Female and male and Weight: Thin and heavy? What us job applicant's capabilities?
The percent that a particular psychologist has a case load between 90 and 105. When the mean is 115 and the standard deviation is 10.
What is 15.25%?
Calculate the CI if m=10, n=32, s=2, df=31, t=2.042 and Sx=.359
What is 9.267 and 10.733?
A social researcher wants to know if the number of times people eat out a week differs before and after marriage. Test the null hypothesis that the number of times people eat out a week does not differ before and after marriage.
Before marriage: 2, 1, 3
After marriage: 6, 4, 5
What is a significant difference?
The symbols for null and research hypothesis.
What is H0 and HA?
90th percentile = z score of 1.2816
If the mean = 100
standard deviation = 16 then
Find the raw score.
What is 120.506?
The number of rehabilitation patients that are score 23 and 25 on a progression scale. When the mean is 22 and standard deviation is 2.5
What are 5 patients?
Difference between the Standard Error of the Mean and the Estimate Standard Error of the Mean.
What is the square root of N vs. the square root of N-1?
A social researcher wants to know if the number of electronic devices owned differs by social class. Test the null hypothesis that the number of electronic devices does not differ by social class.
Lower class: 1, 0, 2
Upper class: 2, 4, 3
What is not significant?
The symbol for the Estimate Standard Error of the Differences Between Means.
What is SX1-X2?
Write the concluding statement for a dependent sample means t-test when the purpose of the study is if the number of times people eat out a week differs before and after marriage. There researchers found there was no significant difference. The degrees of freedom is 2 and critical value of t is 4.303.
What is
A dependent same means t-test was conducted to determine [if the number of times people eat out a week differs before and after marriage]. Results showed that there was no significant difference between [before and after marriage] on [the number of times people eat out] . t(2)=4.303 P>.05