MEASURES OF SPREAD – VARIABILITY- DIVERSITY
... Percentiles – divide data into 100ths. E.g. GRE score in 85th percentile means that 85 percent of the students taking the test scored lower and 15 percent of the students scored higher than this. QUARTILES- special percentiles: 50th, 25th and 75th percentiles. ...
... Percentiles – divide data into 100ths. E.g. GRE score in 85th percentile means that 85 percent of the students taking the test scored lower and 15 percent of the students scored higher than this. QUARTILES- special percentiles: 50th, 25th and 75th percentiles. ...
ANIMAL / PLANT / PROTIST
... Excel: Choose the appropriate critical t from your table of results 1 > 2 -- One-tail t-test (Mean of one group > mean of other group) 1 2 -- Two-tail t-test (Means of two groups not equal) Step 5: Decide to reject or not reject the null hypothesis ...
... Excel: Choose the appropriate critical t from your table of results 1 > 2 -- One-tail t-test (Mean of one group > mean of other group) 1 2 -- Two-tail t-test (Means of two groups not equal) Step 5: Decide to reject or not reject the null hypothesis ...
This time: ANOVA examples, course wrap-up.
... I hope this serves you when the need to handle data does come up: A large portion new research papers in psych/crimin/sociology or health sciences use data in some form, and often the analysis is at or near the level that we covered in this course. ...
... I hope this serves you when the need to handle data does come up: A large portion new research papers in psych/crimin/sociology or health sciences use data in some form, and often the analysis is at or near the level that we covered in this course. ...
Population characteristics: Population mean
... Chapter 8:Tests of Hypotheses based on a Single Sample A point estimate of a population characteristic is a single number that is based on sample data and represents a plausible value of the characteristic. The best statistic (MVUE) is the unbiased statistic with the smallest standard deviation. Sin ...
... Chapter 8:Tests of Hypotheses based on a Single Sample A point estimate of a population characteristic is a single number that is based on sample data and represents a plausible value of the characteristic. The best statistic (MVUE) is the unbiased statistic with the smallest standard deviation. Sin ...
µ 2
... from two groups in a randomized experiment. o 10%: When sampling without replacement, check that n1 ≤ (1/10)N1 and n2 ≤ (1/10)N2. • Normal/Large Sample: Both population distributions (or the true distributions of responses to the two treatments) are Normal or both sample sizes are large (n1 ≥ 30 and ...
... from two groups in a randomized experiment. o 10%: When sampling without replacement, check that n1 ≤ (1/10)N1 and n2 ≤ (1/10)N2. • Normal/Large Sample: Both population distributions (or the true distributions of responses to the two treatments) are Normal or both sample sizes are large (n1 ≥ 30 and ...
Statistics
... 16. A private opinion poll is conducted for a politician to determine what proportion of the population favors adding more national parks. How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the true proportion by more than 3%? a. 22 b. 1844 c. 1 ...
... 16. A private opinion poll is conducted for a politician to determine what proportion of the population favors adding more national parks. How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the true proportion by more than 3%? a. 22 b. 1844 c. 1 ...
