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An educator wanted to look at the study habits of university students. As part of the research, data was collected for three variables - the amount of time (in hours per week) spent studying, the amount of time (in hours per week) spent playing video games, and the GPA - for a sample of 20 male university students. As part of the research, a 95% confidence interval for the average GPA of all male university students was calculated to be: (2.95, 3.10). Which of the following statements is true? c...

hypotheses for hypothesis tests for slope correct answers H0: b1=b2=b3= 0 Ha: at least one b =/ 0 assumptions and conditions correct answers -linearity assumption -independence assumption -equal variance assumption -normal population assumption linearity assumption correct answers when the scatterplot is roughly straight independence assumption (randomization condition) correct answers the residual scatterplot had NO pattern equal variance assumption (equal spread condition) co...

The z value tells us the number of _______ that a value of x is from the mean correct answers standard deviation The grade a student received on an examination was transformed to a z value, which was negative. Therefore, we know that he scored correct answers below the mean If the p-value for testing H0 versus Ha is 0.0174 we will correct answers Since p-value = .0174 < .05, we will reject the null hypothesis in favor of the alternative when α = .10 and .05. However, we will fail to re...

Business Analyst correct answers Person who manages, cleans, and aggregates data; serves as a bridge between stakeholders and business by conducting analytical studies to help change business processes Business User correct answers person who takes data to make decisions based on their jobs and also interprets data Data Scientist correct answers a person skilled in data inference, algorithm development and technology in order to solve complex problems. Scatter Plot (what relationship do...

To determine a Probability, we collect ____ from an Experiment to study the effects of a change. correct answers Data DEF: A scientific process in order to make a discovery, test a hypothesis, or investigate a known fact from historical data; Process that results in an outcome correct answers Experiment DEF: A collection of independent Experiments correct answers Trial The Probability of an Event is always between ____ and ____. correct answers 0 and 1 DEF: A number that measures th...

DEF: Information that can be expressed in statistical or numerical form correct answers Quantitative Data How do we describe categorical variables? correct answers Counting T/F: We do not perform arithmetic operations on the values of categorical variables. correct answers True What are some examples of Qualitative Data? correct answers Gender Zip Codes Phone # State of Origin What are the steps in describing Qualitative Data? correct answers Step 1: determine the number of catego...

Given the sample data set (113, 115, 117, 119, 127, 129), what's the standard deviation? correct answers 6.54 Why is business analytics a hard course to teach (Bell, 2013)? A. every business student has to take it B. there is too much info to teach it all C. technology is changing so rapidly, professors have to change their courses each year D. a lot of professors want to teach it E. so many students want to spend the entire class discussing current events in light of analytic develop...

In __ we select elements because they are easy to sample. correct answers convenience sampling __ sampling is where we know the chance that each element will be included in the sample, which allows us to statistical inferences about the sample population correct answers probability Which of the following is a type of question used in survey research? correct answers open ended, dichotomous, and multiple choice are all correct A ___ is a list of all units in a population correct answers ...

Parts of a good graph correct answers title x and y axis scale key data values Summarizing Qualitative (categorical) Data correct answers tables: frequency relative frequency percent frequency contingency graph: bar chart pie chart Summarizing Quantitative Data correct answers histogram time series scatter plot Ownership correct answers individuals own their own data confidential and anonymity Consent correct answers individuals providing data provide expressed cont...

A ________ is a measure of the chance that an uncertain event will occur. correct answers probability The ________ of two events X and Y is another event that consists of the sample space outcomes belonging to either event X or event Y or both events X and Y. correct answers union P(AUB) = P(A) + P(B) − P(A∩B) represents the formula for the ________. correct answers addition rule A process of observation that has an uncertain outcome is referred to as a(n) ________. correct answers ...