A physical therapist is interested in whether people with different bone structures will be affected differently by her new therapy program. She randomly chooses two groups of patients based on bone type: small-boned frame (XS) and large-boned frame (XL). Patients all had similar injuries. She measures the number of days each person takes to progress to a predetermined point. Here is the data: Small Bones Large BonesMean 10.0012.00n 15 12s2 4.5 5.0SS 108 105 What is the estimated standard error of the difference? a. 1.13 b. 3.30 c. 1.28 d. 1.63
Added by Max B.
Step 1
Given data: - For small bones (XS): - \(s_1^2 = 4.5\) - \(n_1 = 15\) - For large bones (XL): - \(s_2^2 = 5.0\) - \(n_2 = 12\) Now, let's calculate the standard error step by step. ** Show more…
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