Please do the calculations not using excel, yet instead by hand and by using the appropriate formulas.

Use the following to answer questions 510: We would like to test the effect of smoking on weight gain (WT_GAIN) of pregnant women (lb) in group of pregnant women. Please note: WT_GAIN=weight at delivery - pre pregnancy weight (lb) and SMOKE="Y" for Yes, "N" for No. I used computer software and obtained the following results. I purposefully deleted some information from the printout that you must complete. Table I SMOKE = N SMOKE = Y wbagain wt gain N 116 33 LO 95% CI 26.635 18.821 Mean 33.569 24.909 Up 95% CI 40.503 30.997 SD ? 17.169 Variance 1421.3 ? SE Mean 3.5004 ? Minimum -17.000 3.0000 1st Quarti 16.000 12.500 Median 29.000 21.000 3rd Quarti 38.750 36.000 Maximum 255.00 65.000 Q 5-7. Complete the missing information in Table I (?) Q8. Should we use pooled the variance hassasna X/N 29. Write the null and alternative hypothesis for testing a claim that on overage the smokers have lower weight gains than non-smokers. Q10. Is there a sufficient evidence in support of the claim at a=0.05? (hint compute the appropriate test statistic)