Question 1175854
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Hi
Population:   μ = 50mg
Sample:  n = 36 and   x̄ = 47mg  and s =8mg
Ho:   μ =  50
Ha    μ <  50
1)Level of significance is .05
2) One-tailed
3) Sample 36, population σ Unknown: using t-test
4)  critical value- df35 :  t = 1.69
4) {{{t =blue (x - mu)/blue(s/sqrt(n))}}}
      t = -3/(8/6) = -2.25
   | t | > critical value 
Reject Ho.  
data suggest that the population mean dosage of this brand is less than 50 mg