Response to alarm call Enter or Stand up or run to burrow freeze Totals Days since weaning 1-5 21 18 39 6-10 16 24 40 10-15 12 19 Totals 49 49 98 Is there convincing evidence that the response to an alarm call is different for the different age groups? Test the relevant hypothesis at the 0.05 level.

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2. Juvenile free-living ground squirrels utilize responses known as "alarm calls" in response to
predators. These calls can alert others to danger. Newly weaned squirrels emerge from the nest at
about 25 days of age. Do the squirrels emerge with automatic responses to alarm signals, or are the
responses learned? To answer this question, a biologist played recordings of alarm calls for three
random samples from populations (by age) of squirrels and observed the squirrels' responses. She
reasoned that if the responses were not different for the different age groups, the squirrels must be
responding by instinct. On the other hand, if the responses differ with the age of the squirrels the
young squirrels must be learning to respond to the alarm calls. Her data for the responses,
categorized by age, is presented below:
Response to alarm call
Enter or
Stand up or
run to burrow
freeze
Totals
Days since weaning
1-5
21
18
39
6-10
16
24
40
10-15
12
19
Totals
49
49
98
Is there convincing evidence that the response to an alarm call is different for the different age
groups? Test the relevant hypothesis at the 0.05 level.
日 合
hp
Insert
Transcribed Image Text:2. Juvenile free-living ground squirrels utilize responses known as "alarm calls" in response to predators. These calls can alert others to danger. Newly weaned squirrels emerge from the nest at about 25 days of age. Do the squirrels emerge with automatic responses to alarm signals, or are the responses learned? To answer this question, a biologist played recordings of alarm calls for three random samples from populations (by age) of squirrels and observed the squirrels' responses. She reasoned that if the responses were not different for the different age groups, the squirrels must be responding by instinct. On the other hand, if the responses differ with the age of the squirrels the young squirrels must be learning to respond to the alarm calls. Her data for the responses, categorized by age, is presented below: Response to alarm call Enter or Stand up or run to burrow freeze Totals Days since weaning 1-5 21 18 39 6-10 16 24 40 10-15 12 19 Totals 49 49 98 Is there convincing evidence that the response to an alarm call is different for the different age groups? Test the relevant hypothesis at the 0.05 level. 日 合 hp Insert
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