Question

Suppose that the amount of snowfall that Minneapolis gets in a year is normally distributed with a mean of 45 inches and a standard deviation of 5 inches. This year, what is the probability that Minneapolis will gets.

a) More than 58 inches of rain This would be 2 standard deviations or more above the mean and construct a 95 % confidence interval.

b) Between 40 and 50 inches of rain One standard deviation on either side of the mean… and construct a 90 % confidence interval.

c) Less than 30 inches of rain 3 Standard deviations or more below the mean and construct a 99 % confidence interval.

Answer #1

The total snowfall per year in Laytonville is normally
distributed with mean 99 inches and standard deviation 14 inches.
Based on the Empirical Rule, what is the probability that in a
randomly selected year, the snowfall was less than 127 inches?
Enter your answer as a percent rounded to 2 decimal places

Question 19 The total snowfall per year in Laytonville is
normally distributed with mean 99 inches and standard deviation 14
inches. Based on the Empirical Rule, what is the probability that
in a randomly selected year, the snowfall was less than 127 inches?
Enter your answer as a percent rounded to 2 decimal places if
necessary. Provide your answer below: ( )%

The amount of annual snowfall in a certain mountain range is
normally distributed with a mean of 73 inches and a standard
deviation of 9 inches. What is the probability that the annual
snowfall for 1 randomly picked year will be below 75.4 inches?
Round your answer to 3 decimal places.

The amount of snowfall falling in a certain mountain range is
normally distributed with a mean of 70 inches and a standard
deviation of 10 inches. What is the probability that the mean
annual snowfall during 25 randomly picked years will exceed 72.8
inches? Write your answer as a decimal rounded to 4 places.

The amount of annual snowfall in a certain mountain range is
normally distributed with a mean of 70 inches and a standard
deviation of 10 inches. If X` represents the average amount of
snowfall in 5 years, find k such that P(X`<k)=0.85. Round your
answer to 3 decimal places.
Group of answer choices
80.364
65.365
46.825
74.635
93.175

The annual snowfall for a snow resort is found to be normally
distributed with a mean of 1416 cm and a standard deviation of 63
cm. What value of snowfall is likely to be exceeded with a
probability of 0.20?

Suppose that the annual rainfall in Ferndale, California, is known
to be normally distributed, with a mean of 35.5 inches and a
standard deviation of 2.5 inches. About what percent of the years
will it rain more than 38 inches in fernadale? (You may need to use
the standard normal distribution table Round your answer to the two
decimal places.)

1. Consider a normally
distributed population with a standard deviation of 64. If a random
sample of 90 from the population produces a sample mean of 250,
construct a 95% confidence interval for the true mean of the
population.
2.A psychologist is
studying learning in rats (to run a maze). She has a sample of 40
rats and their mean time to run the maze if 5 minutes with a
standard deviation of 1. Estimate the average time to run...

A simple random sample of size nequals24 is drawn from a
population that is normally distributed. The sample mean is found
to be x overbar equals 58 and the sample standard deviation is
found to be sequals10. Construct a 90% confidence interval about
the population mean. The 90% confidence interval is ( nothing,
nothing). (Round to two decimal places as needed.)

The
amount of snow falling in a certain mountain range is normally
distributed with a mean of 110 inches, and standard deviation of 16
inches. What is the probability that the mean annual snowfall
during 64 randomly pick years will exceed 112.8 inches? Round your
answer to four decimal places
a.) 0.0026
b.) 0.4192
c.) 0.0808
d.) 0.5808

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