Hello please show the way the problem is worked. Question 1 What is the estimated 95% confidence interval (CI) of the average difference in blood

Hello please show the way the problem is worked.

Question 1

What is the estimated 95% confidence interval (CI) of the average difference in blood vitamin D levels between US landscapers and office workers in ng/mL? Assign groups 1 and 2 to be landscapers and office workers, respectively.Top of Form Question 1

Table 1. LandscapersTable 2. Office Workers

SubjectVitamin DSubjectVitamin D

129.73149.538

233.898250.3

334.105353.941

436.952439.762

539.145551.33

648.349649.482

742.362749.171

825.749847.115

931.081947.304

1034.3911045.974

1130.2961150.839

1240.711241.927

1335.6271351.509

1436.1681450.152

1543.9031538.821

1630.2071641.427

1723.2831741.755

1838.4161846.212

1930.7621941.513

2039.5262043.97

2137.0242157.52

2229.2642248.433

2339.3982345.217

2435.64

2529.706

2635.971

2729.113

2833.865

2942.655

3043.802

3143.12

3232.618

3339.438

3444.549

3525.432

3640.351

3738.143

3841.094

3933.389

4042.826

Select one:

a. -15.67 to -8.93 ng/mL

b. -15.47 to -7.50 ng/mL

c. -13.93 to -8.16 ng/mL

d. -14.91 to -6.93 ng/mL

Question 2

What is the estimated 95% confidence interval (CI) of the proportion of schoolchildren developing nausea and vomiting following holiday parties?

Please note the following: 1) 0 and 1 are defined as no and yes, respectively, which is a typical coding scheme in Public Health; 2) you might calculate a CI that is different from any of the multiple choice options listed below due to rounding differences, therefore select the closest match; and 3) you may copy and paste the data into Excel to facilitate analysis.

Table

SubjectNausea and

Vomiting?

11

20

30

41

51

61

71

80

90

101

111

121

131

140

151

160

171

180

190

200

211

220

230

241

251

260

270

280

290

300

310

321

330

341

351

361

370

380

391

Select one:

a. 0.296 to 0.583

b. 0.330 to 0.644

c. 0.287 to 0.696

d. 0.307 to 0.741