Question Details

(solution) TABLE A.5 Areas of the standard normal distribution = 0, =


Can you guys help me out they are Confidence Interval questions. Use Z table I attached thanks. 

1.

Strategic business planning is required for the successful transfer of control between generations in family-owned companies. However, a survey of 315 privately held family firms whose annual turnover exceeded one million dollars it was found that 80 had no strategic business plan. Assuming that simple random sampling was employed to determine the sample for the survey, estimate with 95% confidence the proportion of family-owned companies operating without strategic business plans. Give the upper limit only and report your answer correct to three decimal places.
TABLE A.5 Areas of the standard normal distribution ? = 0, ? = 1

 

The entries in this table are the probabilities that a

 

standard normal random variable is between 0 and z1

 

(the shaded area).

 

0 z1 z z1 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.0

 

0.1

 

0.2

 

0.3

 

0.4 .0000

 

.0398

 

.0793

 

.1179

 

.1554 .0040

 

.0438

 

.0832

 

.1217

 

.1591 .0080

 

.0478

 

.0871

 

.1255

 

.1628 .0120

 

.0517

 

.0910

 

.1293

 

.1664 .0160

 

.0557

 

.0948

 

.1331

 

.1700 .0199

 

.0596

 

.0987

 

.1368

 

.1736 .0239

 

.0636

 

.1026

 

.1406

 

.1772 .0279

 

.0675

 

.1064

 

.1443

 

.1808 .0319

 

.0714

 

.1103

 

.1480

 

.1844 .0359

 

.0753

 

.1141

 

.1517

 

.1879 0.5

 

0.6

 

0.7

 

0.8

 

0.9 .1915

 

.2257

 

.2580

 

.2881

 

.3159 .1950

 

.2291

 

.2611

 

.2910

 

.3186 .1985

 

.2324

 

.2642

 

.2939

 

.3212 .2019

 

.2357

 

.2673

 

.2967

 

.3238 .2054

 

.2389

 

.2704

 

.2995

 

.3264 .2088

 

.2422

 

.2734

 

.3023

 

.3289 .2123

 

.2454

 

.2764

 

.3051

 

.3315 .2157

 

.2486

 

.2794

 

.3078

 

.3340 .2190

 

.2517

 

.2823

 

.3106

 

.3365 .2224

 

.2549

 

.2852

 

.3133

 

.3389 1.0

 

1.1

 

1.2

 

1.3

 

1.4 .3413

 

.3643

 

.3849

 

.4032

 

.4192 .3438

 

.3665

 

.3869

 

.4049

 

.4207 .3461

 

.3686

 

.3888

 

.4066

 

.4222 .3485

 

.3708

 

.3907

 

.4082

 

.4236 .3508

 

.3729

 

.3925

 

.4099

 

.4251 .3531

 

.3749

 

.3944

 

.4115

 

.4265 .3554

 

.3770

 

.3962

 

.4131

 

.4279 .3577

 

.3790

 

.3980

 

.4147

 

.4292 .3599

 

.3810

 

.3997

 

.4162

 

.4306 .3621

 

.3830

 

.4015

 

.4177

 

.4319 1.5

 

1.6

 

1.7

 

1.8

 

1.9 .4332

 

.4452

 

.4554

 

.4641

 

.4713 .4345

 

.4463

 

.4564

 

.4649

 

.4719 .4357

 

.4474

 

.4573

 

.4656

 

.4726 .4370

 

.4484

 

.4582

 

.4664

 

.4732 .4382

 

.4495

 

.4591

 

.4671

 

.4738 .4394

 

.4505

 

.4599

 

.4678

 

.4744 .4406

 

.4515

 

.4608

 

.4686

 

.4750 .4418

 

.4525

 

.4616

 

.4693

 

.4756 .4429

 

.4535

 

.4625

 

.4699

 

.4761 .4441

 

.4545

 

.4633

 

.4706

 

.4767 2.0

 

2.1

 

2.2

 

2.3

 

2.4

 

2.5

 

2.6

 

2.7

 

2.8

 

2.9

 

3.0

 

3.1

 

3.2

 

3.3

 

3.4 .4772

 

.4821

 

.4861

 

.4893

 

.4918

 

.4938

 

.4953

 

.4965

 

.4974

 

.4981

 

.4987

 

.4990

 

.4993

 

.4995

 

.4997

 

.4998

 

.49997

 

.499997

 

.4999997

 

.499999999 .4778

 

.4826

 

.4864

 

.4896

 

.4920

 

.4940

 

.4955

 

.4966

 

.4975

 

.4982

 

.4987

 

.4991

 

.4993

 

.4995

 

.4997 .4783

 

.4830

 

.4868

 

.4898

 

.4922

 

.4941

 

.4956

 

.4967

 

.4976

 

.4982

 

.4987

 

.4991

 

.4994

 

.4995

 

.4997 .4788

 

.4834

 

.4871

 

.4901

 

.4925

 

.4943

 

.4957

 

.4968

 

.4977

 

.4983

 

.4988

 

.4991

 

.4994

 

.4996

 

.4997 .4793

 

.4838

 

.4875

 

.4904

 

.4927

 

.4945

 

.4959

 

.4969

 

.4977

 

.4984

 

.4988

 

.4992

 

.4994

 

.4996

 

.4997 .4798

 

.4842

 

.4878

 

.4906

 

.4929

 

.4946

 

.4960

 

.4970

 

.4978

 

.4984

 

.4989

 

.4992

 

.4994

 

.4996

 

.4997 .4803

 

.4846

 

.4881

 

.4909

 

.4931 .4808

 

.4850

 

.4884

 

.4911

 

.4932 .4812

 

.4854

 

.4887

 

.4913

 

.4934 .4817

 

.4857

 

.4890

 

.4916

 

.4936 .4948

 

.4961

 

.4971

 

.4979

 

.4985

 

.4989

 

.4992

 

.4994

 

.4996

 

.4997 .4949

 

.4962

 

.4972

 

.4979

 

.4985

 

.4989

 

.4992

 

.4995

 

.4996

 

.4997 .4951

 

.4963

 

.4973

 

.4980

 

.4986

 

.4990

 

.4993

 

.4995

 

.4996

 

.4997 .4952

 

.4964

 

.4974

 

.4981

 

.4986

 

.4990

 

.4993

 

.4995

 

.4997

 

.4998 3.5

 

4.0

 

4.5

 

5.0

 

6.0 768? Appendix

 


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