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A university planner wants to determine the proportion of spring semester students who will attend summer school. She surveys 32 currents students discovering that 12 will return for summer school. b. with a 0.95 probability, how large of a sample would have to be taken to provide a margin of error of 3% or less?
Compute the effect size for each of the following average SAT math scores. Remember SAT math is standardized such that u= 500 and standard deviation =100.
Please see the attached file for the fully formatted problems. Convert the following equations into logarithmic form:
Conduct the equivalent, nonparametric test of hypothese using the five-step process. Do the following teams average a salary of 70 million dollars a year or less?
A survey of 600 non-fatal accidents showed 259 involved the use of a cell phone. Construct a 99% confidence interval for the proportion of fatal accidents that involved the use of a cell phone?
Discuss three measures of central tendency for the dependent variable. Is this distribution skewed? If so, in what direction? Explain your answer. Why would you NOT attempt to determine the central tendency of the independent variables?
What is the value of the population mean? What is the best estimate of this value? Explain why we need to use the t distribution. What assumption do you need to make?
Suppose that a random sample of fifteen recently sold houses in a certain city has a mean sales price of $290000 , with a standard deviation of $15,000.
Compare and contrast quantitative and qualitative research designs. Identify and discuss some advantages and disadvantages for each type of research.
This activity is a revision of an activity found in Real Data: A Statistics Workbook Based on Empirical Data by Z. C Holcomb (1997). Published by Pyrczak Publishing.
What do we mean by confidence intervals - provide an example that illustrates your answer. Suppose we were to apply 95% and 99% confidence to your study results.. how might your result differ and why?
Compute the 95% confidence interval around the mean of each of the three groups and plot the confidence interval in the space provided above.
A trans-oceanic airline conducted a study to determine whether the average weight of baggage checked by a passenger differs significantly from 45 pounds.
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