# Listed below are the numbers of cricket chirps in 1 minute

September 11, 2019

Listed below are the numbers of cricket chirps in 1 minute and the corresponding temperatures in

degrees°F.

1.Construct a scatterplot, and find the value of the linear correlation coefficient r. Is there sufficient evidence to conclude that there is a linear correlation between the number of chirps in 1 minute and the temperature? Use a significance level of

alphaαequals=0.050.05.

 Chirps in 1 min 892892 11931193 11061106 845845 12061206 10191019 947947 909909 Open in StatCrunch+Copy to Clipboard+Open in Excel+ Temperature(degrees°F) 71.771.7 92.392.3 8585 76.676.6 89.889.8 83.383.3 71.671.6 79.779.7

Construct a scatterplot. Choose the correct graph below.

A.

5010001500Chirps in 1 minTemperature (°F)

Edit Coordinates… (0,0)

A scatterplot has a horizontal axis labeled Chirps in 1 minute from 50 to 100 in increments of 5 and a vertical axis labeled Temperature (degrees Fahrenheit) from 0 to 1500 in increments of 100. Eight plotted points follow the pattern of a line that rises from left to right passing through the approximate points (71.5, 890) and (90, 1210).

B.

5010001500Temperature (°F)Chirps in 1 min

Edit Coordinates… (0,0)

A scatterplot has a horizontal axis labeled Temperature (degrees Fahrenheit) from 50 to 100 in increments of 5 and a vertical axis labeled Chirps in 1 minute from 0 to 1500 in increments of 100. Eight plotted points follow the pattern of a line that rises from left to right passing through the approximate points (71.5, 890) and (90, 1210).

C.

5010001500Chirps in 1 minTemperature (°F)

Edit Coordinates… (0,0)

A scatterplot has a horizontal axis labeled Chirps in 1 minute from 50 to 100 in increments of 5 and a vertical axis labeled Temperature (degrees Fahrenheit) from 0 to 1500 in increments of 100. Eight plotted points follow the pattern of a line that falls from left to right passing through the approximate points (78.5, 890) and (60, 1210).

D.

5010001500Temperature (°F)Chirps in 1 min

Edit Coordinates… (0,0)

2.. A scatterplot has a horizontal axis labeled Temperature (degrees Fahrenheit) from 50 to 100 in increments of 5 and a vertical axis labeled Chirps in 1 minute from 0 to 1500 in increments of 100. Eight plotted points follow the pattern of a line that falls from left to right passing through the approximate points (78.5, 890) and (60, 1210).

What are the null and alternative hypotheses?

A.

Upper H 0H0:

rhoρequals=0

Upper H 1H1:

rhoρnot equals≠0

B.

Upper H 0H0:

rhoρequals=0

Upper H 1H1:

rhoρless than<0

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