In the Late 1890s, Scientists First Noted That the Frequency

question 27

Multiple Choice

In the late 1890s, scientists first noted that the frequency of a cricket's chirps is related to air temperature.For each of 30 crickets, the frequency of chirping (in chirps per minute) and the air temperature (in degrees Fahrenheit) were recorded, and a regression analysis was performed. ​

Given that Sxx= 14,497.9 and 117.067, what is a 95% confidence interval for the mean air temperature when a cricket is chirping at a frequency of 120 chirps per minute?

• A) (66.539, 67.301)
• B) (63.818, 68.022)
• C) (65.462, 66.379)
• D) (62.389, 67.451)

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