A preparation of insulin is being studied to determine the effects on reducing t

Question

A preparation of insulin is being studied to determine the effects on reducing the blood-sugar level in rats. 25 rats of identical breed are randomly injected with different dosages of insulin (X) and reduction rate in their blood-sugar levels (Y) are recorded. The results are summarized as:

And the incomplete Analysis of Variance table is given as: S.S. Source D.F M.S. 225 Regression 225 Error Total 24 593 For testing hypothesis to against the that claim the average reduction rates in blood-sugar levels is at least 7 while injected 8 units of insulin dosage, what is the value of test statistic? O -1.7678 O 2.2361 O -2.5 O -3.3541 O None of above

Explanation / Answer

Answer:

Source

SS

DF

MS

F

SSR

225

1

225

14.06

SSE

368

23

16

Total

593

24

Calculated F=14.06 > 4.28 critical value at 0.05 level.

Ho is rejected.

Source

SS

DF

MS

F

SSR

225

1

225

14.06

SSE

368

23

16

Total

593

24

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