Question 12 Does taking Vitamin D increase the mean lifespan of a rat? A sample of 20 rats was randomized to group 1 (co

[answerhappygod]

Question 12 Does Taking Vitamin D Increase The Mean Lifespan Of A Rat A Sample Of 20 Rats Was Randomized To Group 1 Co 1 (295.35 KiB) Viewed 74 times

Question 12 Does taking Vitamin D increase the mean lifespan of a rat? A sample of 20 rats was randomized to group 1 (control) and group 2 (Vitamin D). The lifespan (days) of each rat was measured. Here is some of the output. Means and Std Deviations Level Number 10 2 t Test 2-1 10 Upper CL Dif Lower CL Dif Confidence Mean 531.500 611.500 Assuming unequal variances Difference Std Err Dif 80.00 t Ratio 38.38 DF 160.66 Prob> |t| -0.66 Prob> t 0.95 Prob<t Which of the following is correct? Std Dev 83.3350 88.2563 O Ho: X₁ <X₂ H₂: X₂=X₂ H₂₁:₂=₂ H₁₂ : <₂ H₂₂ <H₂ H₂ : ₁₂ = ₂ ⒸH₂X₁=X₂ H₂:X₁ <X₂ 2.084161 17.94107 0.0517 1 pts 0.0259* 0.9741