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2. Suppose than an instructor want wants to investigate whether the font used on an exam affects student performance as measured by the final exam score. She uses four different fonts (time , courier, helvetica, comic sans ) and randomly assigns her 40 students to one of these four fonts. a. Identify the explanatory and response variables in this study. b. Is this an observational study or a randomized experiment? Explain how you know. c. Even though the subjects in this study were not randomly selected from a population, it's still appropriate to conduct an analysis of variance .Explain why.
jane wants to setup a photo shop. the cost to rent an office is 150 per week. the variable cost of making one photo is
Test the hypothesis that there is not relationship between the proneness to use excessive force score and the force score for officers trained at Academy A.
Characteristics on patients participating in a clinical trial.
The population mean is within $50.00 of the sample mean?
A sample of 10 executives indicated that they spent an average of $11.30 with a sample standard deviation of 0.56 on lunch. Let = 0.05. What are the critical values?
Analyze the processed data in Statistical survey.
Find the test statistic.
Managerial Report equations and analysis.
statistics1 an electronics company is about to launch a new product. if the serial number for eachnbsp piece produced
Create the indicator variables, the raw data does not include these - calculate a difference in the gscores between the consecutive rows; this is how we know if the Gleason score has increased since the last biopsy, which is one of the indicators f..
A traffic engineer is studying a stretch of road on a rural highway. At his observation point, an average of 12 vehicles per hour pass. The vehicles are independent of each other. 1. What is the probability that fewer than 5 vehicles pass betwee..
Find the number of people who will score between 458 and 556.
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