(a)
n1=30
n2 = 45
Standard Error = SE1 =
So, answer is:
This is a graph of a normal distribution with E()
= 24 and
.
(b)
P(Sample mean is within 1 inch of population mean):
Z = 1/0.3651= 2.7390
Table of Area Under Standard Normal Curve gives area = 0.4969
So,
P(Sample mean is within 1 inch of population mean) = 0.4969 X 2 = 0.9938.
(c)
P(Sample mean is within 1 inch of population mean):
Z = 1/0.2981= 3.3546
Table of Area Under Standard Normal Curve gives area = 0.4996
So,
P(Sample mean is within 1 inch of population mean) = 0.4996 X 2 = .0.9992
(d)
The probability of being within 1 inch :is greater for New York in part (c) because the sample size is greater.
CUMULATIVE PROBABILITIES FOR THE STANDARD NORMAL DISTRIBUTION (Continued) TABLE 1 Cumulative probability Entries in the table...
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think this is that table not sure
X) 6.1.5 Question Help Find the critical value zc necessary to form a confidence interval at the level of confidence shown below c = 0.82 Zc Round to two decimal places as needed.) .01 .02 03 .05 .07 08 0.0 5000 5040 5080 5120 5160 5199 5239 5279 5319 5359 0.0 01 0.1 5398 5438 5478 5517 5557 5596 5636 5675 57145753 0.1 0.2 5793 5832 5871 5910 5948 5987 6026 6064...
3.4 0,00030.0003 0.0003 0.0003 00003 0.00030.0003 0.0003 0.0003 0.0002 3.3 0,0005 0.0005 0.0005 0,0004 0.0004 0.0004 0.0004 0.0004 0,0004 0.0003 3.2 0,00070,0007 0,0006 0.0006 0.0006 0.0006 0,0006 0,0005 0.0005 0.0005 -3. 0,0010 0,0009 0.0009 0,0009 0,0008 0.0008 0,0008 0,0008 0.0007 0,0007 3.0 0,0013 0.0013 0.0013 0.0012 0.0012 0.0011 0.0011 0.0011 0,0010 0.0010 -2.9 0,0019 0.0018 0.0018 0.0017 0.0016 0.0016 0.0015 0,0015 0.0014 0.0014 -2.8 0,00260.0025 0.0024 0.0023 00023 0.0022 0.002 0,0021 0.0020 0.0019 2.7 0,0035 0,0034 0.0033 0.0032 0.0031 0.0030...