CHYS 3P15 Final: CHYS 3P15 - Textbook Review for Exam.docx

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carminecamel732

19 Apr 2012

School

Brock University

Department

Child and Youth Studies

Course

CHYS 3P15

Professor

Heather Lawford

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Document Summary

Random error: any pattern of data that might have been caused by a true relationship between variables might instead have been caused by change. Hypothesis testing flow chart: develop research hypothesis, set alpha, calculate power to determine the sample size that is needed, collect data, calculate statistic and p-value, compare p-value to alpha, decide to reject or accept the null. Inferential statistics: use the sample data to draw inferences about the true state of affairs. Sampling distribution: the distribution of all the possible values. Binomial distribution: sample distribution for events have two equally likely possibilities. Null hypothesis: the assumption that the observed data reflect only what would be expected under the sampling distribution. Significance level (alpha): standard that the observed data must meet. The smaller the alpha is, the more stringent the standard is. Probability value (p-value): shows the likelihood of an observed statistic occurring on the basis of the sampling distribution.

Related Questions

A probability distribution for all possible values of a sample statistic is known as
A.normal distribution
B. uniform distribution random c.sampling sampling distribution
D.sampling distribution

A function of a random variable which describes the probability that random variable is
Select one
A.Probability distribution function
B. Discrete random variable
C. Sampling distribution function
D. Continuous random variable

Consider the normal distribution the vanability is increased and the height of the curve is decreased for the
A. Larger value of standard deviation
B. Smaller value of mean
C. Smaller valie of stabdard deviation
D. Larger value of mean

The sampling destination of the sample mean is a distribution of
A. Sample statistic /estimator
B. individual population values
C. individual sample values
D. Population parameters

The sampling distribution of the mean is distribution of
A. Sample statistic
B. Population parameters
C. individual population values
D. individual sample values

periwinkleelephant946

In a recent court case it was found that during a period of 11 years

people were selected for grand jury duty and

of them were from the same ethnicity. Among the people eligible for grand jury duty,

were of this ethnicity. Use a

significance level to test the claim that the selection process is biased against allowing this ethnicity to sit on the grand jury. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method and the normal distribution as an approximation to the binomial distribution.

Which of the following is the hypothesis test to be conducted?
What is the test statistic?
What is the P value?

lavenderskunk484

(a) In testing hypotheses, which of the following would be strong evidence against the null hypothesis?

A. Obtaining data with a small P-value.

B. Obtaining data with a large P-value.

C. Using a small level of line significance.

D. Using a a large level of significance.

(b) The P-value of a test of a null hypothesis is

A. The probability of the null hypothesis is true.

B. The probability, assuming the null hypothesis is false, that the test statistic will take a value at least as extreme as that actually observed.

C. The probability, assuming the null hypothesis is true, that the test statistic will take a value at least as extreme as that actually observed.

D. The probability of the null hypothesis is false.

A. 0.05

B. the probability of observing the data you actually obtained

C. a statement of ''no effect'' or '' no difference''.

D. a statement that the data are 0.

viridianweasel783

CHYS 3P15 Final: CHYS 3P15 - Textbook Review for Exam.docx

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