Question
In: Math
For the following situations, please write out null and alternative hypotheses. a. Assuming m = 100,...
For the following situations, please write out null and alternative hypotheses.
a. Assuming m = 100, do children who watch more than three hours of TV per day have significantly lower IQs?
b. Assuming m = 100, a cognitive psychologist would like to know if the IQs of children who play outside at least three days a week are different from that of the population.
c. Assuming m = 50, write out the null and a non-directional alternative hypothesis.
Solutions
Expert Solution
a) Assuming m = 100, do children who watch more than three hours of TV per day have significantly lower IQs.
Null hypothesis : Children who watch TV three hours per day have IQ level 100 , m = 100
Mathematically, Ho : m = 100
Alternate hypothesis : Children who watch more than three hours of TV per day have significantly lower IQ, m < 100
Mathematically, Ha : m < 100
b) Assuming m = 100, a cognitive psychologist would like to know if the IQs of children who play outside at least three days a week are different from that of the population.
Null hypothesis : Children who play outside less than three days a week have IQ level 100 , m = 100
Mathematically, Ho : m = 100
Alternate hypothesis : Children who play outside at least three days a week have different different IQ level than 100
Mathematically, Ha : m 
100
c) Assuming m = 50, write out the null and a non-directional alternative hypothesis.
Null hypothesis : Variable m takes a value 100 , m = 100
Mathematically, Ho : m = 100
Alternate hypothesis : Variable m takes a value other than 100
Mathematically, Ha : m 100
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