Quiz vs Lecture Pulse Rates Do you think your pulse rate is higher when you are taking a quiz than when you are sitting in a lecture? The data in Table 6.23 show pulse rates collected from 10 students in a class lecture and then from the same students during a quiz. The data are stored in QuizPulse10. Construct a 95% confidence interval for the difference in mean pulse rate between students in a class lecture and taking a quiz. Table6.23Quiz and lecture pulse rates for 10 students Student 1 2 3 4 5 6 7 8 9 10 Mean Std. Dev. Quiz 75 52 52 80 56 90 76 71 70 66 68.8 12.5 Lecture 73 53 47 88 55 70 61 75 61 78 66.1
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
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Student
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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Mean
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Std. Dev.
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Quiz
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75
|
52
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52
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80
|
56
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90
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76
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71
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70
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66
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68.8
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12.5
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Lecture
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73
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53
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47
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88
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55
|
70
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61
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75
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61
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78
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66.1
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12.8
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