AsianAtari9340
02.07.2020 •
Mathematics
In a study of 905 randomly selected children aged 15-17, 198 say they watch 3 or more hours of television per day. In a study of 503 randomly selected children aged 12-14, 97 reported they watch 3 or more hours of television per day. Is there a significant difference between age and watching television in teenagers
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Ответ:
The calculated value Z = 0.063< 1.96 at 5% level of significance
Null hypothesis is accepted
There is no significant difference between age and watching television in teenagers
Step-by-step explanation:
Step(i):-
Given random sample size 'n' = 905
Given data 198 say they watch 3 or more hours of television per day.
Given random first sample size
n₁ = 905
First sample proportion
Given random second sample size
n₂ = 503
second sample proportion
Step(ii):-
Null Hypothesis : H₀
There is no significant difference between age and watching television in teenagers
Alternative Hypothesis :H₁
There is significant difference between age and watching television in teenagers
Step(iii):-
Test statistic
Where
P = 0.2094
Q = 1 - 0.2094 = 0.7906
on calculation , we get
Z = 0.063
The critical value Z₀.₀₅ = 1.96
The calculated value Z = 0.063< 1.96 at 5% level of significance
Conclusion:-
Null hypothesis is accepted
There is no significant difference between age and watching television in teenagers
Ответ:
Graph the function and its parent function. Then describe the transformation. 7.9(x) = x + 4. 8. f(x) = x - 6. 4. 8 x. -4. 48 x. Describe Transformation:.Step-by-step explanation: