STAT 202 Midterm Exarm ur work for partlal credit. Final answers do not (eg, an

Question

STAT 202 Midterm Exarm ur work for partlal credit. Final answers do not (eg, an answer of "x 17*5-4/3" would work nstructions: Complete each problem and show all oform have to be fully computed, they can be left in equation get full credit if that is the correct value of x). and show all of nless a problem states otherwise, assume = 0.05. (3) Suppose a sample of S0 people is taken and we are using the tdi test comparing a mean with a benchmark. 1) Find the critical value(s) for a two-tailed test Find the critical value(s) for a left-tailed test with =0.1. with a 0.05. b. a) 2,009 1,219 (- ) (6) For each of the following tests, determine the appropriate conclusion (Reject Ho or Fail Reject Ho). Type of Test Test Statistio

Explanation / Answer

Here we have sample size(n)=50

so degree of freedom(DF)=n-1=50-1=49

(a) here we have alpha=0.05 and df=49

Now tcritical = t/2,df =t0.05/49=2.009575=2.010 (rounded to three decimal) [calculated using excel formula '=T.INV.2T(0.05,49)=2.010' critical value also can be find using table.]

Note: here you can put t0.05/49=+/- 2.010 where + sign indicates right side and -ve sign on left side.

(b) Here we have

=0.1 and df=49

tcritical = t/2,df =t0.1,49= -1.29907= -1.299 (rounded to three decimal)

Here "-ve sign indicates it is left tailed"

calculated using excel formula '=T.INV(0.1,49)'= -1.29907

Please rate!

,

=0.1 and df=49

tcritical = t/2,df =t0.1,49= -1.29907= -1.299 (rounded to three decimal)

Here "-ve sign indicates it is left tailed"

calculated using excel formula '=T.INV(0.1,49)'= -1.29907

Please rate!

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