Jse the sample data and confidence level given below to complete parts (a) through (d). na study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2504 subjects randomly selected from an online group involved with ears. 1126 surveys were returned. Construct a 95% confidence interval for the proportion of returned surveys. Click the icon to view a table of z scores. .... a) Find the best point estimate of the population proportion p. (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E=D (Round to three decimal places as needed.) c) Construct the confidence interval. (Round to three decimal places as needed.) d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below. O A. One has 95% confidence that the sample proportion is equal to the population proportion. O B. One has 95% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion. O C. There is a 95% chance that the true value of the population proportion will fall between the lower bound and the upper bound.
Jse the sample data and confidence level given below to complete parts (a) through (d). na study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2504 subjects randomly selected from an online group involved with ears. 1126 surveys were returned. Construct a 95% confidence interval for the proportion of returned surveys. Click the icon to view a table of z scores. .... a) Find the best point estimate of the population proportion p. (Round to three decimal places as needed.) b) Identify the value of the margin of error E. E=D (Round to three decimal places as needed.) c) Construct the confidence interval. (Round to three decimal places as needed.) d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below. O A. One has 95% confidence that the sample proportion is equal to the population proportion. O B. One has 95% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population proportion. O C. There is a 95% chance that the true value of the population proportion will fall between the lower bound and the upper bound.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Need help with statistics
Transcribed Image Text:POSITIVE z Scores
Cumulative Area from the LEFT
09
04
.05
06
07
00
01
.02
03
0.0
5239
5279
5319
5359
5000
5040
5080
5120
5160
5199
0.1
0.0
5675
5714
5753
5517
5557
5596
5636
5398
5438
5478
6141
0.2
5987
6026
6064
6103
5793
5832
5871
5910
5948
0.2
6443
.6480
8517
0.3
6255
6293
6331
6368
6406
0.3
6179
6217
6844
6879
0.4
6664
8700
6736
6772
6808
6554
6591
0628
7224
0.5
7054
7088
7123
7157
7190
0.5
6915
6950
6985
7019
0.6
7422
7454
7486
7517
7549
7257
7291
7324
7357
7389
7794
7823
7852
0.7
7580
7611
7642
7673
7704
7734
7764
0.7
.8106
8133
0.8
7939
7967
7995
8023
8051
B078
7881
7010
8340
8365
8389
0.9
8186
8212
8238
8264
8289
8315
0.9
8159
8621
1.0
8508
8531
8554
8577
8599
1.0
8413
8438
3461
8485
8770
B790
8810
8830
1.1
11
8643
8665
8686
8708
8729
8749
8997
9015
1.2
8688
8907
925
8944
8962
8849
9009
9115
9131
9147
0162
9177
13
9032
9049
9066
9082
0251
9265
0279
9292
9306
9319
14
9192
9207
9222
9236
9382
9394
9406
9418
9429
9441
1.5
9332
9345
9357
9370
9405
9505
9515
9525
.9535
9545
1.6
9452
9463
9474
9484
9582
9591
9599
9608
9616
9625
9633
1.7
9554
9564
9573
0604
0671
9678
9686
9693
9699
9706
1.8
9641
9649
9656
9738
9744
9750
9756
9761
9767
1.9
9713
9719
9726
9732
9783
9788
9793
9798
9803
9808
9812
9817
2.0
9772
9778
9826
9830
9834
9838
0042
9846
9850
9854
9857
9021
9868
0871
9375
9878
9881
9584
9887
9890
22
9861
9664
9898
9901
9904
9906
9900
9911
9913
0016
2.3
23
9893
9896
9020
9922
0925
9927
9929
9A31
9932
9934
9936
24
24
91
1943
9945
9946
9948
9949
9951
9952
2.5
0038
9940
9941
9955
9956
9957
9959
9960
9961
9962
9963
9964
2.6
9953
9966
9967
9908
9969
9970
9971
9972
9973
9974
2.7
9905
9074
9975
9978
9977
9977
9978
9979
9979
9980
9981
2.8
9081
9982
0982
9983
9984
.9984
9985
9985
9986
0986
2.9
9987
9987
9987
0988
9988
9989
9089
9989
9990
.9990
3.0
9900
9991
9991
9991
9992
9992
9992
9992
9993
9993
3.1
11
3.2
9903
9993
9994
.9994
9994
9994
9994
9995
9995
9995
3.2
33
9905
9995
9906
9996
9996
9996
9996
9996
9997
3.3
9907
9997
9997
997
9997
9997
9997
9997
9997
998
3.4
3.50 and up
3.50 and up
9999
00
01
02
03
04
06
07
08
09
NOTE: For values of z above 3.49, use 0.9999 for the area.
Common Critical Values
Confidence
Critical
Value
Level
*Use these common values that result from interpolation
0.90
1.645
2Score
Area
0.95
1.96
1.645
0.9500
0.99
2.575
2.575
0.9950
Transcribed Image Text:Use the sample data and confidence level given below to complete parts (a) through (d).
In a study of cell phone use and brain hemispheric dominance, an Internet survey was e-mailed to 2504 subjects randomly selected from an
online group involved with ears, 1126 surveys were returned. Construct a 95% confidence interval for the proportion of returned surveys.
Click the icon to view a table of z scores.
a) Find the best point estimate of the population proportion p.
(Round to three decimal places as needed.)
b) Identify the value of the margin of error E.
E=D
(Round to three decimal places as needed.)
c) Construct the confidence interval.
(Round to three decimal places as needed.)
d) Write a statement that correctly interprets the confidence interval. Choose the correct answer below.
O A. One has 95% confidence that the sample proportion is equal to the population proportion.
O B. One has 95% confidence that the interval from the lower bound to the upper bound actually does contain the true value of the population
proportion.
O C. There is a 95% chance that the true value of the population proportion will fall between the lower bound and the upper bound.
O D. 95% of sample proportions will fall between the lower bound and the upper bound.
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