Math534 Study guides, Class notes & Summaries

Final Project: Regression and Correlation Analysis Use the dependent variable (labeled Y) and one of the independent variables (labeled X1, X2, and X3) in the data file. Select and use one independent variable throughout this analysis. Use Excel to perform the regression and correlation analysis to answer the following. The week 6 spreadsheet can ... helpful in this work. 1. Generate a scatterplot for the ... dependent variable (Y) and the ... independent variable (X), including the graph of t...

1. Question: In a hypothesis test, the test statistic computed from the sample data is considered extreme or significant if it is __________ 2. Question: A test of the hypotheses, H0: p = 0.18 and H1: p ≠ 0.18 is a _______________. 3. Question: An analyst tested the null hypothesis µ ≥ 30 against the alternative hypothesis that µ < 30. The analyst reported a p-value of 0.07. For what significance level of α will the null hypothesis would be rejected? 4. Question: The dean of a busi...

1. Question: A random sample of 100 selected from a population with a standard deviation of 10 yielded a mean = 225. The mean and the standard deviation of the distribution of the sample means are __________. 2. Question: Suppose a random sample of 49 is selected from a population of size N = 500 with a standard deviation of 14. If the sample mean is 125, the 99% confidence interval to estimate the population mean is between ____________. 3. Question: A manufacturer wants to purchase a certain...

MATH 534 Week 7 Discussion Predictive Analytics Predictive analytics in business is an important application of multiple regression analysis.Generallyspeaking,whatismeantbypredictiveanalytics?Asabusinessowner,howcouldyouuseregressionanalysisand predictive analyticsto increase your company'ssales?

1. Question: In a hypothesis test, the test statistic computed from the sample data is considered extreme or significant if it is __________ 2. Question: A test of the hypotheses, H0: p = 0.18 and H1: p ≠ 0.18 is a _______________. 3. Question: An analyst tested the null hypothesis µ ≥ 30 against the alternative hypothesis that µ < 30. The analyst reported a p-value of 0.07. For what significance level of α will the null hypothesis would be rejected? 4. Question: The dean of a busi...

Week2:ChangingProbabilitiesintoConditionalProbabilities Describe a situationwhere youseeprobabilities or might see probabilities.Thenpresent this probability as a conditional probability. In response, other students canmake assumptions about the conditional probability table that could accompany such asituationandposeaquestionforaspecificprobability.Finally,athirdstudentcanshowthe work of solving the probability. Your first post should start a new probabilitydiscussiononly!

1. Question: In hypothesis testing the statistical conclusion is either to reject or not to reject the null hypothesis based on the sample data. Which of the following statements is true? 2. Question: If a company wants to prove that the proportion (p) of its revenues from overseas operations is more than 18%, the null and alternate hypotheses are __________. 3. Question: A test of the hypotheses, H0: p = 0.18 and H1: p > 0.18 is a _____________. 4. Question: The dean of a business school ...

Week5:HypothesisTesting For this discussion, create and post a 1-2 minute video describing a real-world example of whenahypothesistestcouldbeused.Yourvideoshouldalsoincludeanumericalexampleforanotherstudent to work through in their response. The example can use real data or data that you makeup, such as values for the mean, standard deviation, and sample size. Be sure to note if thestandard deviation is from the population or the sample.In your responses to other students,showtheworkand describ...

Consider when businesses might use confidence intervals to estimate values, such asin sales projections, marketing results, and so forth. Describe a business decision thatcould be helped with confidence intervals. Be specific! Then create a problem withnumbers from which another student could calculate a confidence interval and make adecision.

MATH534 Final Exam Solution’s Study Guide1. The following numbers represent the weights in pounds of six 7-year old children in Mrs. Jones' second grade class (25, 60, 51, 47, 49, 45). Find the mean, median, mode, variance, and standard deviation. Solution: This would be a sample from the class mean = 46.166 (=AVERAGE) median = 48 (=MEDIAN) mode does not exist (looking at the data) variance = 134.5667 (=VARIANCE.S) standard deviation =11.60029 (=STDEV.S) These can also be found using...