1. If the population distribution is normal, then the sampling distribution of the sample mean(With sample size n) is normal. True or false. 2. A sampling distribution of a statistic is the distribution of values taken by the statistic in all possible samples of different sizes from the same population. True or false 3. For […]
In order to evaluate the effect of a drug over a disease a pharmaceutical company wants to perform a study comparing the effect of the drug with placebo. The drug and the placebo will be delivered to both male and female patients to verify any possible different response of the two sexes. The effect of […]
Coursework 2 Exercise CW2.1 Consider the following two 4-year investments, with same initial investment given in the spread- sheet: Investment A: In each year, the annual effective rate of return is a discrete random variable. The rates in each year are independent and identically distributed, and their probability distribution given in the spreadsheet. Investment B: […]
Consider an experiment in which a pharmaceutical company is testing a new drug that it hopes will lower cholesterol levels. The scientists administer three treatments: a dose of the drug, a dose of a placebo, and a control group that receives neither drug nor placebo. After 24 hours, they then measured the cholesterol levels and […]
Humans aren’t the only animals that get cancer; other organisms get tumors, as well, and their risk may be influenced by environmental factors. An ecologist decides to study whether pollution in lakes causes cancer, so he collects 100 fish from each of two lakes, one known to be polluted and the other known to be […]
1. Given the regression equation =4X+2 and the following data, calculate the standard error of the estimate. Also given: r = 0.723 and Sy = 3.13 . X Y 0 2 1 6 2 5 3 8 4 6 Interpret your result (1 point)
Read the supplementary reading entitled “Judicial Sentencing Decisions in Taiwanese Economic rimes” Use your own words to describe the OLS Model. The length of this assignment is about 250-300 words . In you answers, you must specifically address the meaning of and finding about (1) R Square , (2) F-test, and (3) p-value of t-test […]
Introduction Most of IEE 380 is spent reading problems from the text and applying the methods and techniques of the class. Data is provided for you in the problems. However, as working analysts, you may have to collect or generate data. Sometimes this data collection is more time consuming and challenging than the actual statistical […]
Develop a null and an alternative hypothesis for a decision that is relevant to your life. This decision can be personal or professional. Share your null and alternative hypotheses with your peers in this week’s discussion. Be sure to include the following in your post.Define/discuss: All variables ; The appropriate test statistic, and if it […]
Forced Expiratory Volume Data Description One measure of forced expiratory volume (FEV) is the amount of air an individual can exhale in the first second of a forceful breath. Bernard Rosner et al. studied the long-term effects of smoking and second-hand smoke.1They also measured the FEV of teens. The original data source from Rosner’s cross-sectional […]
