a)
Ho : µ = 11
Ha : µ > 11
Level of Significance , α = 0.05
population std dev , σ = 10.5
Sample Size , n = 13
SINCE SIGMA IS KNOWN, Z TEST WILL BE USED(one tail)
critical z value, z* = 1.6449 [
excel formula , =NORMSINV(1-α) ]
B)
Level of Significance , α = 0.02
sample std dev , s = 34.52
Sample Size , n = 24
degree of freedom= DF=n-1= 23
since sigma is not known, t-test will be used(two tail)
critical t value, t* = ± 2.4999
[EXCEL FORMULA =T.INV(α/2,DF) ]
c)SINCE SIGMA IS KNOWN, Z TEST WILL BE USED(two tail)
critical z value, z* = ±1.2816
[ excel formula , =NORMSINV(α/2) ]
d)
since sigma is not known, t-test will be used(one tail)
here,n=5
degree of freedom= DF=n-1= 4
critical t value, t* = -1.5332
[EXCEL FORMULA =T.INV(α,df) ]
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Determine the appropriate critical value(s) for each of the following tests concerning the population mean: а.НА:...
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1) Find the critical z-value(s) for a right tailed test with α = .02 . Assume a normal population. (Round to the nearest hundredth. If more than one value is found, enter the smallest critical value.) 2) Find the critical t-value(s) for a two-tailed test with n = 12, α = .05 . Assume a normal population. (Round to the nearest thousandth. If more than one value is found, enter the smallest critical value.) 3) Find χ2R for a right-tail...
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