In a certain normal distribution one point 1.25% of the area lies to the left of...
In a certain normal distribution one point 1.25% of the area
lies to the left of 42 and 1.25 % of the area lies to the right of
48 .
Find The find the mean and standard deviation.
Homework Answers
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In a certain normal distribution one point 1.25% of the area
lies to the left of...
8) The management at an environmental consulting firm claims the mean weekly salary is $275 with...
8) The management at an environmental consulting firm claims the mean weekly salary is $275 with a standard deviation of $34.10. a) If management's claims are true, what is the probability that an individual worker would make an average weekly salary less than $264.50? b) If management's claims are true, what is the probability that a group of 40 workers would make an average weekly salary less than $264.50? 9) In a normal distribution, 1.25% of the area lies to...
Determine the area under the standard normal curve that lies to the right of left parenthesis...
Determine the area under the standard normal curve that lies to the right of left parenthesis a right parenthesis Upper Z equals 1.25 comma(a) Z=1.25, (b) Upper Z equals negative 0.86 commaZ=−0.86, (c) Upper Z equals 0.02 commaZ=0.02, and (d) Upper Z equals negative 0.78 .Z=−0.78.
Find the area under the standard normal curve that lies to the left of –2.10 and...
Find the area under the standard normal curve that lies to the left of –2.10 and to the right of 1.10. please show work.
(1 point) Consider a normal distribution curve where the middle 90 % of the area under...
(1 point) Consider a normal distribution curve where the middle 90 % of the area under the curve lies above the interval ( 3·11 ) Use this information to find the mean, μ , and the standard deviation, σ , of the distribution. Note: You can earn partial credit on this problem.
To FOUR DECIMAL PLACES: Determine the area under the standard normal curve that lies to the...
To FOUR DECIMAL PLACES: Determine the area under the standard normal curve that lies to the left of Z = –1.31 to the right of Z = –2.47 between Z = –2.47 and Z = –1.31 between Z = 1.31 and Z = 2.47 Find the z-scores that separate the middle 84% of the standard normal distribution from the area in the tails. Find z0.18 a. Find the Z-score corresponding to the 72nd percentile. In other words, find the Z-score...
The area under the standard normal curve that lies to the left of -1.8 is 0.0359....
The area under the standard normal curve that lies to the left of -1.8 is 0.0359. Without consulting a the table giving areas under the standard normal curve, determine the area under the standard normal curve that lies to the right of 1.8. answer: b) Which property of the standard normal curve allowed you to answer part a)? A. The standard normal curve extends indefinitely in both directions B. The standard normal curve is symmetric about 0 C. Almost all...
(1 point) a) Fact the region under the standard normal curve that lies to the left...
(1 point) a) Fact the region under the standard normal curve that lies to the left of -1.92 has area 0.0274289. Without consulting a table or a calculator giving areas under the standard normal curve, determine the area under the standard normal curve that lies to the right of 1.92 answer. b) Which property of the standard normal curve allowed you to answer part a)? A. The standard normal curve extends indefinitely in both directions B. The total area under...
Find z such that 5.4% of the standard normal curve lies to the left of z....
Find z such that 5.4% of the standard normal curve lies to the
left of z. (Round your answer to two decimal places.)
z =
Find z such that 3.9% of the standard normal curve lies to the
right of z. (Round your answer to two decimal places.)
z =
Find the z value such that 93% of the standard normal curve
lies between −z and z. (Round your answer to two decimal
places.)
z =
.....
(1 point) -0.28 Find the area under the normal curve that lies to the left of...
(1 point) -0.28 Find the area under the normal curve that lies to the left of z= -0.28. Express your answer as a decimal. Round to 4 decimal places after the decimal point. Answer:
(1 point) Consider a normal distribution curve where the middle 75 % of the area under...
(1 point) Consider a normal distribution curve where the middle 75 % of the area under the curve lies above the interval (6, 15). Use this information to find the mean, u , and the standard deviation, o , of the distribution. a) u = b) o = Here is a list of some cities' population: 74769000, 1500, 76162000, 78176000, 79748000 The mean of these cities' population is The median of these cities' population is Which number, mean or median,...
8) The management at an environmental consulting firm claims the mean weekly salary is $275 with a standard deviation of $34.10. a) If management's claims are true, what is the probability that an individual worker would make an average weekly salary less than $264.50? b) If management's claims are true, what is the probability that a group of 40 workers would make an average weekly salary less than $264.50? 9) In a normal distribution, 1.25% of the area lies to...
(1 point) Consider a normal distribution curve where the middle 90 % of the area under the curve lies above the interval ( 3·11 ) Use this information to find the mean, μ , and the standard deviation, σ , of the distribution. Note: You can earn partial credit on this problem.
(1 point) a) Fact the region under the standard normal curve that lies to the left of -1.92 has area 0.0274289. Without consulting a table or a calculator giving areas under the standard normal curve, determine the area under the standard normal curve that lies to the right of 1.92 answer. b) Which property of the standard normal curve allowed you to answer part a)? A. The standard normal curve extends indefinitely in both directions B. The total area under...
Find z such that 5.4% of the standard normal curve lies to the
left of z. (Round your answer to two decimal places.)
z =
Find z such that 3.9% of the standard normal curve lies to the
right of z. (Round your answer to two decimal places.)
z =
Find the z value such that 93% of the standard normal curve
lies between −z and z. (Round your answer to two decimal
places.)
z =
.....
(1 point) -0.28 Find the area under the normal curve that lies to the left of z= -0.28. Express your answer as a decimal. Round to 4 decimal places after the decimal point. Answer:
(1 point) Consider a normal distribution curve where the middle 75 % of the area under the curve lies above the interval (6, 15). Use this information to find the mean, u , and the standard deviation, o , of the distribution. a) u = b) o = Here is a list of some cities' population: 74769000, 1500, 76162000, 78176000, 79748000 The mean of these cities' population is The median of these cities' population is Which number, mean or median,...
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