Exam 6: Some Principles of Statistical Inference

"A normal distribution with a mean of 0 and a standard deviation of 1.z-scores correspond to different points of the horizontal axis of the standard normal distribution, cutting off regions of different sizes." What is this a glossary definition of?

Which of the following statement is true?

Which of the following statements is true?

If you had a room full of 100 people, which of the followng events is most unlikely.

A cognitive psychologist has developed a computer simulation of memory processes that generates a simulation of reaction times in response to the presentation of previously learned stimuli.The program has been designed to produce a mean reaction time of 200 msec with a standard deviation of 20.The psychologist is worried that the program has stopped working properly because the last 16 trials have produced a mean reaction time of 190 (with the expected standard deviation of 20).The researcher compares the two means using a z-test to ask whether the observed mean is lower than the expected mean.Which of the following statements is false?

"The distribution of the possible outcomes from a random process where there are two possible events (event p and event q)so that the probability of one or other occurring is 1 (and the probability of p occurring is 1 minus the probability of q occurring, i.e.p = 1 − q).An example would be the process of tossing an unbiased coin, where the probability of getting heads is .5 and the probability of getting tails is .5." What is this a glossary definition of?

"The mean value of a probability distribution.For example, this is 25 for the number of heads when a fair coin is tossed 50 times." What is this a glossary definition of?

"In an equation for a test statistic, the mathematical expression that estimates how much random error there is in the data." What is this a glossary definition of?

Which of the following is true of the normal distribution?

"In an equation for a test statistic, the mathematical expression that estimates how much random error there is in the data".What is this a glossary definition of?

"Statistical uncertainty arising from variation in observations around any measure of central tendency for which the researcher proposes no explanation.It is uncertainty in knowing or predicting individual scores on the basis of a measure of central tendency.This uncertainty is quantified by dispersion measures (e.g.standard deviation, variance, range)." What is this a glossary definition of?

"The standard deviation of any sampling distribution.This is an estimate of random error in estimates of population parameters." What is this a glossary definition of?

A cognitive psychologist has developed a computer simulation of memory processes that generates a simulation of reaction times in response to the presentation of previously learned stimuli.The program has been designed to produce a mean reaction time of 200 msec with a standard deviation of 20.The psychologist is worried that the program has stopped working properly because the last 16 trials have produced a mean reaction time of 190 (with the expected standard deviation of 20).Which of the following statements is true?

You are asked to predict the outcome of a series of tosses of a fair coin.Which of the following is true?

Acording to Tversky and Kahneman (1971), many researchers mistakenly believe that small samples are as representative of an underlying population as large samples.What do they refer to this as?

"A detailed statement about the likelihood of a particular set of events." What is this a glossary definition of?

Which of the following statements is true?

Which of the following is a useful summary of inferential statistics?

Hamlet told Horatio that there were more things in heaven and earth than were dreamt of in his philosophy.In response, Horatio asked all philosophers with similar views to make a list of all the things they had dreamt of and asked them all to conduct a comprehensive count of all the things on earth.He planned to conduct a similar count of the things in heaven at a later stage but assumed that the distribution of things in heaven was similar to that for things on earth.Which of the following is true?

The famous economist J M Keynes observed "In the long run we are all dead".Which of the following is demonstrated by this statement?