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A vending machine dispenses coffee into a twelve ounce cup. The amount of coffee dispensed into the cup is normally distributed with a standard deviation of 0.08 ounce. You can allow the cup to overfill 10% of the time.
What amount should you set as the mean amount of coffee to be dispensed?
= ? ounces
Assuming that the standard deviation and the normal shape are unchanged, to what level must the mean reduce so that 20 gallons per week is the third quartile rather than the mean?
Compute Cronbach's alpha on the scale provided on pp. 710-711 of the Field text using the SAQ.sav file.
A description of how you believe statistics can enrich and represent the results of a study, and an explanation of how statistics can be used to misrepresent the results of a study.
The main purpose of this exercise is to check your understanding of significance level, p-values and power .
Obtain a test statistic and p-value. Interpret the results at = .01.
A local consultant randomly selects a sample of 36 meals whose mean price is determined to be $8.75. Assuming that σ = $0.75, calculate a 95% confidence interval for the population mean price.
Based on these data, determine the 95 percent confidence interval estimate for true population mean?
The number of degrees of freedom for the appropriate chi-square distribution in a test of independence is:
In testing the difference between two means from two independent populations, the sample sizes do not have to be equal to be able to use the Z statistic.
At alpha = 0.05, is there enough evidence to conclude that proportions vary from those in the study?
Compute the effect size with gender as the grouping variable and ADDSC as the dependent variable.
To compute all the descriptive statistics for the following set of three test scores over the course of a semester. Which test had the highest average score? Which test had the smallest amount of variability?
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