Question
In: Statistics and Probability
The distribution of results from a cholesterol test has a mean of 180 and a standard...
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The distribution of results from a cholesterol test has a mean of 180 and a standard deviation of 20. A sample size of 40 is drawn randomly. a. Find the probability that the sum of the 40 values is greater than 7,500. b.
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Solutions
orchestra answered 2 years agoRelated Solutions
The distribution of results from a cholesterol test has a mean of 180 and a standard...
The distribution of results from a cholesterol test has a mean
of 180 and a standard deviation of 20. A sample size of 40 is drawn
randomly.
Find the probability that the sum of the 40 values is greater
than 7,450. (Round your answer to four decimal places.)
The distribution of results from a cholesterol test has a mean of 180 and a standard...
The distribution of results from a cholesterol test has a mean
of 180 and a standard deviation of 20. A sample size of 40 is drawn
randomly.
Find the probability that the sum of the 40 values is less than
6,950.
3. The distribution of results from a cholesterol test has a mean of 180 and a...
3. The distribution of results from a
cholesterol test has a mean of 180 and a standard deviation of 20.
A sample size of 40 is drawn randomly.
a. Find the probability that the sum of the 40
values is greater than 7,550. (Round your answer to four decimal
places.
b. Find the sum that is 1.6 standard deviations
below the mean of the sums. (Round your answer to two decimal
places.)
4. A researcher measures the amount of sugar...
The distribution of results from a cholesterol test has a mean of 180 and a standard deviation of 20. A sample size of 40 is drawn randomly.
The distribution of results from a cholesterol test has a
mean of 180 and a standard deviation of 20. A sample size of 40 is
drawn randomly.Find the sum that is one standard deviation below the mean of the
sums. (Round your answer to two decimal places.)
12. A standard IQ test has a normal distribution with a mean of 100 with a...
12. A standard IQ test has a normal distribution with a mean of
100 with a standard deviation of 15.
a) A score of 145 or higher on this exam is categorized in the
gifted realm. What percent of people would be considered gifted?
___________
b) The people who score in the lowest 5% of the standard IQ test
are considered to have “mental retardation”. What cutoff score is
used to qualify for this benchmark? ___________
A test has an overall mean of 150 and a standard deviation of 8.50. The distribution...
A test has an overall mean of 150 and a standard deviation of
8.50. The distribution of scores for each sub-set is often closely
approximated by the normal curve. What percentage of students will
score lower than 142 or better than 158?
A population has a mean of 180 and a standard deviation of 36. A sample of...
A population has a mean of 180 and a standard deviation of 36. A
sample of 84 observations will be taken. The probability that the
sample mean will be between 181 and 185 is
A population has a mean of 180 and a standard deviation of 24. A sample of...
A population has a mean of 180 and a standard deviation of 24. A
sample of 64 observations will be taken. The probability that the
sample mean will be between 183 and 186 is
A population has a mean of 180 and a standard deviation of 24. A sample of...
A population has a mean of 180 and a standard deviation of 24. A
sample of 64 observations will be taken. The probability that the
sample mean will be within 3 of the population mean is:
A population has a mean of 180 and a standard deviation of 24. A sample of...
A population has a mean of 180 and a standard deviation of 24. A
sample of 64 observations will be taken. The probability that the
sample mean will be less than or equal to 186 is
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