This question is worth 2 points, but you can earn up to 4 po…

This question is worth 2 points, but you can earn up to 4 points for this question.  Explain what the pH scale is.(what it measures, the range of values, etc.). Write your answer using complete sentences, be specific, and include enough detail to earn up to two points.  You will earn two extra credit points if you give at least one example of a solution that is a base and one example of a solution that is an acid.

The amount that a student at a certain university spends per…

The amount that a student at a certain university spends per year on required course materials is a normally distributed variable. In a random sample of 21 students from this university, the mean amount spent per year on required course materials was $742.77 and the sample standard deviation was $236.15. Use the given sample evidence to construct a 95% confidence interval estimate for the mean amount that a student at this university spends per year on required course materials.  How many degrees of freedom does the t-distribution for this problem have? [df] What t-score should be used to construct this 95% confidence interval? [t] What is the lower limit for the confidence interval estimate of the mean? [lower] What is the upper limit for the confidence interval estimate of the mean? [upper]    

Upon completing a valid one-way ANOVA test concerning the me…

Upon completing a valid one-way ANOVA test concerning the means of three groups, a researcher used Tukey’s test to conduct post hoc analysis. A copy of the SPSS output appears below. At the .05 level, use the results of Tukey’s test to fill in the blanks: The means of Group A and Group B [a1] significantly different. The means of Group A and Group C [a2] significantly different. The means of Group B and Group C [a3] significantly different.