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Find the regression line and interpret the value of the slope of the regression line.
1. A normal population had a mean of 60 and a standard deviation of 12. A random sample of 36 units is drawn from the population. Find: a) The standard error of the mean.
State and explain briefly the Gauss-Markov Theorem concerning the desirable properties of the ordinary least squares estimators of the coefficients of a linear regression model.
Which of these models show evidence of a significant linear relationship between treatment cost and the explanatory variable? Justify your answer. Express any significant relationship(s) in words.
Evolutionary influences on memes in linguistics. This is an annotated bibliography of the two influences on memes and its influence in cultural linguistics.
Identify one research paper for each one of the techniques listed below where must be used. 1. Decision Theory (chapter 3) 2. Multiple Linear Regression Analysis (Chapter 4) 3. Linear Programming (Cha
A random sample of 25 apples were take from a large apple tree and were weighted. The mean weight of an apple in the sample was found to be 8 oz. The weights of apples in the tree were known to be nor
1. Calculate the mean, median, and standard deviation for ounces in the bottles. 2. Construct a 95% Confidence Interval for the ounces in the bottles.
Describe what sampling is and why it is necessary. Understand the distinction between probability and non-probability sampling. Describe the main types of sampling techniques and be able to identify t
Describe what your independent and dependent variables are in the experiment answering the question.
Assume that the result is a sample size beyond what you can obtain. Use the compromise function to compute alpha and beta for a sample half the size. Indicate the resulting alpha and beta. Present a
Researchers wanted to explore self-esteem in adolescent boys and adolescent girls. Each respondent completed a 10-item self-esteem scale (they chose one rating for each item from a Likert-type scale
Define the term standard deviation. Why is it important to know the standard deviation for a given sample? What do researchers learn about a normal distribution from knowledge of the standard deviat
Approximately what percent of scores will fall within one standard deviation of the mean under the normal curve?
Develop 90% confidence intervals for the proportion of all students, the proportion of all male students, and the proportion of all female students who were involved in some type of substance abuse.
Find the mean and median for this set of data. Which of these measures is a better indication of the “central tendency” of this set of data?
Compare linear regression to the moving averages and smoothing techniques. Why is linear regression more appropriate for long-range forecasts?
A sample of 16 freezers is tested and yields a sample standard deviation of s = 3.8. Test to see whether the variation specification is exceeded at the 0.05 level of significance.
It can be used to gauge differences in worker responses to employee engagement at a particular organization, or it can be used to show differences in employee productivity on particular work shifts
Examine a research article which incorporates t tests or its nonparametric analogs. Briefly summarize and report the statistic and discus whether the assumptions of the test were met and if the type
Does each article provide statistical information to demonstrate the gravity of the issue, problem, or deficit? What are example(s) of morbidity, mortality, and rate of incidence or rate of occurrence
1) Compare linear regression to the moving averages and smoothing techniques . Why is linear regression more appropriate for long-range forecasts?
Business importance of sampling from a managerial perspective What is data? What is sampling? Explain the importance of sampling from a managerial perspective. Provide examples.
Design an experiment to test the hypothesis that single-gender math classes are beneficial to adolescent females. Operationally define both the independent and dependent variables.
State the best measure of central tendency and the reasons why you chose that measure. State the best measure of dispersion and state the reasons why you chose that measure.