Question

The mean of a normal probability distribution is 220; the standard deviation is 15. Refer to the table in Appendix B.1. (Round the final answers to 2 decimal places.) a. About what percentage of the observations lie between 205 and 235? Percentage of observations % b. About what percentage of the observations lie between 190 and 250? Percentage of observations % c. About what percentage of the observations lie between 175 and 265? Percentage of observations %

Answer #1

The mean of a normal probability distribution is 200; the
standard deviation is 10. Refer to the table in Appendix B.1.
(Round the final answers to 2 decimal places.)
a. About what percentage of the observations
lie between 190 and 210?
Percentage of observations
%
b. About what percentage of the observations
lie between 180 and 220?
Percentage of observations
%
c. About what percentage of the observations
lie between 170 and 230?
Percentage of...

The mean of a normal probability distribution is 380; the
standard deviation is 55. Refer to the table in Appendix B.1.
(Round the final answers to 2 decimal places.)
a. About what percentage of the observations
lie between 325 and 435?
Percentage of observations
%
b. About what percentage of the observations
lie between 270 and 490?
Percentage of observations
%
c. About what percentage of the observations
lie between 215 and 545?
Percentage of...

The mean of a normal probability distribution is 360; the
standard deviation is 50. Refer to the table in Appendix B.1.
(Round the final answers to 2 decimal
places.)
a. About what percentage of the observations
lie between 310 and 410?
Percentage of
observations %
b. About what percentage of the observations
lie between 260 and 460?
Percentage of
observations %
c. About what percentage of the observations
lie between 210 and 510?
Percentage of
observations %

The mean of a normal probability distribution is 400; the
standard deviation is 15. a. About 68% of the observations lie
between what two values? Lower Value Upper Value b. About 95% of
the observations lie between what two values? Lower Value Upper
Value c. Nearly all of the observations lie between what two
values? Lower Value Upper Value
statisyics

The mean of a normal probability distribution is 380; the
standard deviation is 18. a. About 68% of the observations lie
between what two values? b. About 95% of the observations lie
between what two values? c. Practically all of the observations lie
between what two values?

The mean of a normal probability distribution is 380; the
standard deviation is 10.
a. About 68% of the observations lie between what two
values?
About 95% of the observations lie between what two values?
Practically all of the observations lie between what two
values?

The mean of a normal distribution is 520 kg. The standard
deviation is 9 kg. Refer to the table in Appendix B.1. (Round the z
values to 2 decimal places and the final answers to 4 decimal
places.) a. What is the area between 538 kg and the mean of 520 kg?
Area b. What is the area between the mean and 510 kg? Area c. What
is the probability of selecting a value at random and discovering
that it...

The mean of a normal probability distribution is 340; the
standard deviation is 20.
About 68% of the observations lie between what two values?
About 95% of the observations lie between what two values?
Practically all of the observations lie between what two
values?

The mean of a normal probability distribution is 440; the
standard deviation is 16. About 68% of the observations lie between
what two values? About 95% of the observations lie between what two
values? Practically all of the observations lie between what two
values?

The mean of a normal probability distribution is 360; the
standard deviation is 14.
(a)
About 68 percent of the observations lie between what two
values?
Value 1
Value 2
(b)
About 95 percent of the observations lie between what two
values?
Value 1
Value 2
(c)
Practically all of the observations lie between what two
values?
Value 1
Value 2

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