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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.
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find the 98 confidence interval for the difference between two means based on this information about two samples.
What is the appropriate procedure to test a significant difference in means between the two groups? Use the critical-value method.
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you measure the weight of 5 small birds for two years these are the resultsbird year 1 year 21 512 5002 510 4903 508
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a fish tank in a pet store has 23 fish in it. 8 are orange and 15 are white. determine the probability that if we
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