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The following are midterm and ?nal examination test scores for 10 students from a calculus class, wherex denotes the midterm score and y denotes the ?nal score for each student.
x
68
87
75
91
82
77
86
79
y
74
80
93
88
97
95
89
92
(a) Calculate the least-squares regression line for these data.
(b) Plot the points and the least-squares regression line on the same graph.
the sample mean0.9075 and standard deviation0.03. if the true process mean0.93 how likely is it to observe a sample
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clarify how you would display each of the following in a report 1. the outcomes of a t test with 38 degrees of freedom
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Conduct all 6 steps of the appropriate statistic. Be sure to label all six steps. b. Calculate and interpret the effect size for this test. c. Calculate and interpret any post-hoc test if necessary.
A store asked 250 of its customers whether they were satisfied with the service or not. The responses were also classified according to the gender of the customers. We want to study whether there is a relationship between satisfaction and gender.
Find a dataset: approximately 30-100 scores or observations. Write a null and alternative hypothesis, conduct a statistical significance test (in SPSS or Excel), and tell what decision you'd make about the null hypothesis, and why.
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At the .05 significance level, can we conclude that there is a difference in their mean times?
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