The alternative hypothesis is the hypothesis that sample observations are influenced by some non-random cause. 3. What is a test statistic? (0.5 points) A statistic is a single measure of some attribute of a sample. It is calculated by applying a function (statistical algorithm) to the values of the items of the sample, which are known together as a set of data.
Discussion Question - Week One DQ 1 Explain the difference between the null hypothesis and the alternate hypothesis. How is the null hypothesis chosen? Why is it null? What is the importance of rejecting the null hypothesis in relation of the sample to the population? With a failure to reject the null hypothesis, might we make a general statement about the population based on the sample findings?
amusement or indifference) whereas irrational beliefs will lead to unhealthy emotions (e.g. fear or panic). Ellis claimed that irrational beliefs can lead to negative and inappropriate emotions. In 1967 Beck indentified the cognitive triad which consisted of three main cognitive biases that lead to disorders such as depression; a negative view of the world, a negative view of themselves and a negative view of the future. These biases interrelate and tend to perpetuate someone's depression.
Answer: False Difficulty: Medium 5. The sampling distribution of a sample statistic is the probability distribution of the population of all possible values of the sample statistic. Answer: True Difficulty: Easy 6. A sample statistic is an unbiased point estimate of a population parameter if the mean of the populations of all possible values of the sample statistic equals the population parameter. Answer: True Difficulty: Medium 7.
The test statistic is used to determine whether the researcher should use the null or alternative hypothesis. The third step is to state the conditions that will accept or reject the null hypothesis and identify the critical value for the test statistic. The critical value separates the non-reject region from the reject region ("Test Of Hypothesis", 2014). The fourth step is to compute the appropriate test statistic and compare it with the critical value. The null hypothesis is rejected if the computed
It all depends on how sensitive the mean is, for example when it is very sensitive in the extreme values and the distribution is not symmetrical, and the mean will be away from the center and more near the extreme values. In statistics normality is important so the underlying population is normally distributed. (Doane & Seward, 2007) * What effect does sample size, n, have on the estimate of the mean? Is it possible to normalize the data when the population shape has a known skew? How would you demonstrate the central limit theorem to your classmates?
Negative coefficients in a regression usually indicate weak predictors. [ T ] True [ ] False 5. Non-normality of the residuals from a regression is best detected by looking at the residual plots for each predictor. [ X ] True [ ] False 6. The unexplained sum of squares measures the variability of the dependent variable about a. the mean of the Y values.
a) The population b) The population parameter of interest c) The sampling frame d) The sample e) The sampling method, including whether or not randomization was employed. f) Any potential sources of bias you can detect and any problems you see in generalizing to the population of
CBT is a method of treatment that attempts to modify thought patterns in order to alter behavioral and emotional states. The main idea behind the therapy is that cognitive assessments affect how a person perceives themselves, therefore tracing back the origins of the symptoms. As one of the main symptoms of schizophrenia is distorted thought patterns, it is assumed that CBT would be effective in terms of reducing this, but only if antipsychotics are also used to reduce psychotic thought processes that interfere with psychological treatments. Typically, CBT Is administered around once every 10 days for about 12 sessions to help the patients identify their distorted beliefs that have a maladaptive influence on their
Hate Crimes Susan Harvey Com/156 November 10, 2013 Ann Wehrman Hate Crimes People live in a world today where they are judged by their skin color, ethnicity, nationality, religious beliefs, disability, and sexual orientation. When an individual or group acts out because of at least one of these, that action becomes a hate crime. The first hate crime was recorded in 1922 by the Ku Klux Klan, a White supremacist movement in Louisiana. Two people were murdered experiencing kidnapping and torcher, according to records (Hopkins 2010). In the United States, every hour someone commits a hate crime, resulting in racial wars and death and intolerable obscuring human rights.