Question

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 | |

Answer #1

(a)

By Empirical Rule:

68% of data will lie in mean Standard deviation

= 360 14 = (346, 374)

So,

Answer is:

Value 1 | 346 |

Value 2 | 374 |

(b)

By Empirical Rule:

95% of data will lie in mean 2 X Standard deviation

= 360 ( 2 X 14) = 360 28 = (332, 388)

So,

Answer is:

Value 1 | 332 |

Value 2 | 388 |

(c)

By Empirical Rule:

Practically all of observations will lie in mean 3 X Standard deviation

= 360 ( 3 X 14) = 360 42 = (318, 402)

So,

Answer is:

Value 1 | 318 |

Value 2 | 402 |

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 probability distribution is 390; the
standard deviation is 14.
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

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 320; the
standard deviation is 18.
a)About 68% of the observations lie between what two values?
Value #1_____. Value #2______.
b)About 95% 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______.

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...

If the average of a normal distribution of losses is $5,000 and
the standard deviation is $200 – 68% of values lie within one
standard deviation.
What is the upper bound and lower bound for this range?
Similarly, 95% of values lie within 2 standard deviations.
What is the upper bound and lower bound for this range?

Q1-. A normal distribution has a mean of 15 and a standard
deviation of 2. Find the value that corresponds to the 75th
percentile. Round your answer to two decimal places.
Q2-.Tyrell's SAT math score was in the 64th percentile. If all
SAT math scores are normally distributed with a mean of 500 and a
standard deviation of 100, what is Tyrell's math score? Round your
answer to the nearest whole number.
Q3-.Find the z-score that cuts off an area...

A distribution of values is normal with a mean of 278.8 and a
standard deviation of 18.6.
Find the probability that a randomly selected value is between
261.7 and 301.9.
P(261.7 < X < 301.9) =
*please show all calculations and steps*

1. A distribution of values is normal with a mean of 110.8 and a
standard deviation of 33.5.
Find the probability that a randomly selected value is less than
20.7.
P(X < 20.7) =
Enter your answer as a number accurate to 4 decimal places. *Note:
all z-scores must be rounded to the nearest hundredth.
2. A distribution of values is normal with a mean of 2368.9 and
a standard deviation of 39.4.
Find the probability that a randomly selected...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 7 minutes ago

asked 7 minutes ago

asked 11 minutes ago

asked 11 minutes ago

asked 11 minutes ago

asked 11 minutes ago

asked 13 minutes ago

asked 13 minutes ago

asked 16 minutes ago

asked 19 minutes ago

asked 22 minutes ago