Grossmont College math Correlation between gestation and longevity
Description
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Learn by Doing
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A list of StatCrunch directions is provided at the bottom of this text-box.
Context
Recall the following example: The average gestation period, or time of pregnancy, of an animal is closely related to its longevity—the length of its lifespan. Data on the average gestation period and longevity (in captivity) of 40 different species of animals have been recorded.
For the StatCrunch problem, you will analyze data for 40 species of animals in captivity.
Variables
animal: the name of the animal species
gestation: the average gestation period of the species, in days
longevity: the average longevity of the species, in years
The explanatory variable is average lifespan (longevity.) The response variable is length of pregnancy (average gestation period.)
Data
Open the animals data set in the Stats at Cuyamaca College group on StatCrunch (directions – opens in a new tab).
Prompt
In the first question you will produce a scatterplot in StatCrunch (with longevity as the explanatory variable and gestation as the response variable) and then use StatCrunch to calculate the correlation coefficient.
List of StatCrunch Directions
Open a datafile in the Stats at Cuyamaca College group
Download StatCrunch Output Window (do not take screenshots; please use these directions)
- Embed Pictures in a Textbox (do not post attachments; please use these directions)
Copy and Paste StatCrunch Text Output
Create a Scatterplot in StatCrunch
Produce the Correlation Coefficient in StatCrunch
Here is a PDF document with all StatCrunch directionsLinks to an external site..
Flag question: Question 1Question 110 pts
If you have not done so yet, open the animals data set in the Stats at Cuyamaca College group on StatCrunch (directions – opens in a new tab).
Use StatCrunch to create a scatterplot with longevity as the explanatory variable and gestation as the response variable. (directions)
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