The value of P(-60
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A: Given the reproduction number R of an epidemic spreading process taking place on a random network…
Q: What cutoff value bounds the lowest 30% when using a normal model with a mean of 40 and a standard…
A: Given normal model with mean 40 and standard deviation 4.With reference to Standard normal table the…
Q: A normal distribution has a normal distribution of 70 with a standard deviation of 8. If one score…
A: Here Given Mean=μ=70 Standard Deviation=σ=8
Q: The mean value of the scores in a Statistics exam was 85 with a standard deviation of 4. Find an…
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Q: High density lipoprotein in healty males follow a normal distribution with a mean of 50 and a…
A: Consider X be a random variable which follows normal distribution indicates the high-density…
Q: p(x<71)=? mean=40;standard deviation=15
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Q: According to the empirical rule for population data that form a normal distribution, 95% of the…
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Q: About % of the area under the curve of the standard normal distribution is between 0.059 and z =…
A: Press 2nd and VARS Choose normalcdf
Q: The score on a standardized test for a certain year is modeled using the normal distribution shown…
A: From the given information, it is clear that, V=Mean μ=76.5, Standard deviation σ=5.2 According to…
Q: Consider the normal distribution with mean 50 and standard deviation 8. Find the area under the…
A: 1)GivenMean(μ)=50standard deviation(σ)=8
Q: The average hourly wage last year for members of the hospital clerical staff in a large city was…
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Q: What percentage of a normal distribution falls above a z score of -0.70? Type in your percentage and…
A: percentage of a normal distribution falls above a z-score of -0.70z-score=-0.70
Q: Scores on a certain IQ test are approximately normally distributed with a mean of 100 and a standard…
A: As per our guidelines we are suppose to answer only three subparts kindlypost the remaining subparts…
Q: What percentage of z-scores in the standard normal distribution are between z = -.20 and z = .40
A: Finding the p-value from z using excel
Q: The mean systolic blood pressure in a certain population of men between the ages of 20 and 24 is…
A: We have to find given proportions....
Q: About % of the area under the curve of the standard normal distribution is between z = 2.677 and z =…
A: In question, Given z = -2.677 and z = 2.677 then we'll find area under these two values. Where z is…
Q: tion x = 58 f
A: A statistical tool known as a z score can be used to estimate how far a raw score is from a mean of…
Q: The mean IQ of 320 college students of a certain university is 100 with a standard deviation of 15.…
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Q: hat is the IQ score that corresponds to "very smart
A: The z score can be calculated as: z=x-μσ The required z score that is associated with the top 2.5%…
Q: Scores on a standardized exam are known to follow a normal distribution with standard deviation σσ =…
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Q: For normal distribution with a mean of 4 and a standard deviation of 2, the value 5 has a z value of…
A: Mean, μ = 4 Standard deviation, σ = 2 Raw score, X = 5
Q: One method of grading tests that uses a normal curve gives students letter grades depending on the…
A: For the distribution of scores, it is inferred that: μ (population mean)=76σ (population standard…
Q: Glucose levels in patients free of diabetes are assumed to follow a normal distribution with a mean…
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Q: True or false: The standard deviation of the difference between the average height of 20 random men…
A: Generally the standard deviation for single group would be greater than the standard deviation of…
Q: normal distribution has µ=80 standard deviation of 10. what is probability of randomly selecting a…
A: Given: Calculate the corresponding Z score as follows: The probability of randomly selecting a…
Q: The probability that a randomly selected sociology major received a starting salary offer less than…
A: It is given that the mean is 43256 and standard deviation is 3150.
Q: The average number of miles (in thousands) that a car's tire will function before needing…
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Q: above 70?
A: Given that Normal distribution with Mean (μ) = 88 Standard deviation (σ ) = 10.64 What percent of…
Q: The 1996 verbal SAT scores have a near-normal distribution with mean µ = 505 and standard deviation…
A: We have to find SAT score...
Q: For a normal distribution with μ = 68 and σ = 6.5, determine the minimum data value to be in P85 (85…
A: For a normal distribution with μ = 68 and σ = 6.5, determine the minimum data value to be in P85 (85…
Q: For a standard normal distribution, determine the z-score, z0, such that P(z [three decimal…
A: Given P(Z<Zo)=0.3177 Zo calculate from standard normal distribution table
Q: The average score for games played in the NFL is 22.3 and the standard deviation is 9.3 points. 12…
A: Given information- Sample mean, µ = 22.3 Sample standard deviation, σ = 9.3 Sample size, n = 12 Let,…
Q: for normal distribution mean is 100 and standard deviation is 20 use the emperican graph and gave 3…
A: We have to find normal distribution mean fall with 3 standard deviation values lower and upper…
Q: For a normal distribution with μ = 80 and σ = 3.2, determine the z-score of 78.4064. z-score =…
A: see the handwritten solution
Q: Below is a graph of a normal distribution with mean μ = -4 and standard deviation =2. The shaded…
A: The graph of normal distribution is given with the mean and standard deviation
Q: A population forms a normal distribution with a mean of 85 and a standard deviation of 24 compute…
A: The mean is 85 and the standard deviation is 24.
Q: What percentage of the area under the normal curve is within +/-1, +/-2, and +/-3 standard…
A: Let Z be the random variable from standard normal distribution with mean = 0 and standard deviation…
Q: The length of a movie file that is available for streaming is modeled using the normal distribution…
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Q: A person with "normal" blood pressure has a diastolic measurement of 76 mmHg, and a standard…
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Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 267 days…
A: Mean = 267 Standard deviation = 15
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- Approximately what percentage of scores falls between -1 and +1 Standard deviation around the mean under than normal curve?Iron plates are required to have a certain thickness but each plate produced will differ slightly from each other due to properties of the material and uncertainties in the behaviour of the machines that make them. Let X be the plate thickness in mm of plates produced by a given machine. Using the machine's default setting, X follows a normal distribution with mean 12mm and standard deviation 1.5mm (a) What percentage of plates should be expected to be thinner than 10 mm? (b) What percentage of plates should be expected to be thicker than 15mm?What is the area of the region on the normal curve between one standard deviation below the mean and three standard deviation above the mean?
- For males in a certain town, the systolic blood pressure is normally distributed with a mean of 105 and a standard deviation of 5. Using the empirical rule, determine the interval of systolic blood pressures that represent the middle 68% of males.Question For a certain delivery business, the length of time for a delivery to arrive is exponentially distributed with a mean of 5 days. What is the probability that a random order will take 8 days or more to arrive? Round your answer to the nearest thousandth.High density lipoprotein (HDL) in healthy males follows a normal distribution with a mean of 50 and a standard deviation of 8. What proportion of healthy males has HDL exceeding 60?
- approximate area under the normal distribution curve that falls within one standard deviation above and below the mean. Please give the shaded region.The undergraduate grade point averages (UGPA) of students taking an admissions test in a recent year can be approximated by a normal distribution, as shown in the figure. (a) What is the minimum UGPA that would still place a student in the top 1515% of UGPAs? (b) Between what two values does the middle 5050% of the UGPAs lie? mean is 3.22 standard deviation is 0.21Scores on a standardized exam are known to follow a normal distribution with standard deviation σσ = 17. A researcher randomly selects 85 students and computes their average score. He reports that the mean score is 76.3, with a margin of error of 2.792. How confident are you that the mean score for all students taking the exam is in the interval (73.508, 79.092)? Confidence =
- The average score for games played in the NFL is 22.4 and the standard deviation is 9 points. 43 games are randomly selected. Round all answers to 4 decimal places where possible and assume a normal distribution. P(¯xx¯ < 20.4413) = Find the 69th percentile for the mean score for this sample size. P(22.6413 < ¯xx¯ < 24.3863) =What raw score for age corresponds to a z- score of +4.50, given a mean of 12.0 years and a standard deviation of 4.0 years?Some students paid a private tutor to help them improve their results on a certain mathematical test. These students had a mean change in score of + 18 points, with a standard deviation of 68 points. In a random sample of 100 students who pay a private tutor to help them improve their results, what is the likelihood that the change in the sample mean score is less than 10 points? Click the icon to view the table of normal curve areas. Normal Curve Areas P(x< 10) = (Round to three decimal places as needed.) 0. .00 .01 .02 .03 .04 .05 .06 .07 .08 .09 .0000 .0398 .0793 .1179 .1554 .1915 .0 .1 .0040 .0438 .0080 .0478 .0871 1255 .0160 .0557 .0948 .1331 .1700 2054 .0120 .0517 .0199 .0596 0987 1368 .1736 2088 .0239 .0636 1026 .1406 1772 2123 0279 .0675 1064 1443 1808 2157 .0319 0714 .1103 1480 1844 2190 0359 .0753 1141 1517 1879 2224 .2 .3 .0832 .1217 .1591 1950 .0910 1293 1664 1628 .5 .1985 2019 .2257 .2580 .2881 .3159 3413 2291 2611 .6 .7 .8 .9 1.0 2324 2642 2939 3212 3461 2357 2673 2967…
