You want to know whether national disasters significantly affect anxiety. You use an established anxiety scale with μ = 50, σ = 45). You sample N = 87 individuals from San Francisco right after a major earthquake, and the sample has M = 70. Identify the independent (+levels) and dependent variables. Does the independent variable significantly affect the dependent variable? What do you conclude? Use ɑ = 0.05.
Sol:
Ho:μ = 50
Ha:μ not = 50
alpja=0.05
Independent variable-national disasters
dependent variable-anxiety
z=xbar-mu/s/sqrt(n)
z=(70-50)/(45/sqrt(87)
z=4.145502
p value in excel is
=NORM.S.DIST(-4.145502,TRUE)
=1.69535E-05
=2*1.69535E-05
P=3.3907E-05
p=0.000034
p<0.05
Reject Ho
Accept Ha
Conclusion:
There is suffcient statistical evidence at 5% level of signiifcance
to conlcude that national disasters significantly affect
anxiety
You want to know whether national disasters significantly affect anxiety. You use an established anxiety scale...
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