Suppose that X is a normally distributed with mean 34 and standard deviation 12 Find the P(X>25)
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A: It is given that mean and standard deviation are 1466 and 304, respectively.
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of…
A: Given:
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of…
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Q: Suppose that IQ’s of 1,200 applicants to a university are approximately normally distributed with a…
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Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ , of…
A: given data population sd (σ) = 2595% ci for μ , E = 3 ; n = ?
Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…
A: To find: What percentage of students from this school earn scores that satisfy the admission…
Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…
A:
Q: What percentage of students from this school earn scores that fail to satisfy the admission…
A: The combined SAT scores for the students at a local high school are normally distributed with a mean…
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Q: ppose x comes from a distribution where the mean is 151 and the standard deviation is 22. Suppose a…
A: Population mean =151Population standard deviation =22Sample size n =63
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A: Given information: μ=79.5 m/hσ=41.2 m/h
Q: A production process has a cycle time, time to produce a part, that is normally distributed with a…
A: We have given that. X~N( μ , ?^2 ) μ =12.6 , ? =2.4 Z-score =( x - μ )/?
Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…
A: Given: Mean μ = 1479 Standard deviation σ = 310 X = 642 Formula Used: Z-score = X-μσ
Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…
A: Given that, Mean, mu= 1456 And standard deviation, sigma= 306 We've to find, P(X<1150) We know…
Q: Suppose x has a distribution with a mean of 90 and a standard deviation of 27. Random samples of…
A: According to the provided information, Mean (μ) = 90 Standard Deviation (σ) = 27 Sample Size (n) =…
Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…
A: For the normally distributed combined SAT scores, it is given that,The mean, μ=1516And the standard…
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ , of…
A:
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure,μ , of…
A: Given information Standard deviation (σ) = 27 mm hg Confidence level = 0.95
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Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…
A: Here, mean is 1526 and standard deviation is 295. We will use z-standard normal distribution.
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, µ, of…
A: Sample size determination is a crucial and the foremost stage before any statistical analysis, which…
Q: Assume that adults have IQ scores that are normally distributed with a mean of mu equals 100μ=100…
A: The probability that a randomly selected adult has in IQ between 84 and 116 is obtained below:Let X…
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A: Given data,μ=9.3σ=0.4P(X<x)=10%=0.10x=?
Q: Suppose that IQ scores in 1 region are normally distributed worth a standard deviation of 16.…
A: We have to find population mean.
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ , of…
A:
Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…
A: The mean is 1527 and the standard deviation is 306.
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of…
A: Given,standard deviation(σ)=27margin of error(E)=5α=1-0.95=0.05α2=0.025Z0.025=1.960 (from…
Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…
A: The percentage of students from this school earns scores that satisfy the admission requirement is…
Q: The combined SAT scores for the students at a local high school are normally distributed with a mean…
A: See the hand written solution
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, u, of…
A:
Q: Suppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of…
A: The population mean systolic blood pressure is .It is needed to find the sample size with 99%…
Q: normally distributed with 0 for the mean and 1 for the standard deviation, what is the probaility…
A: Use the standard normal table to find the required probability.
Q: a sample of n=300 male college freshmen has a mean weight of 160 with a standard devation of 11. how…
A: It is given that the weight of freshmen follows normal distribution with mean of 160 and standard…
Q: Suppose the systolic blood pressure (in mm) of adult males has an approximately normal distribution…
A: Construct the empirical rule graph. The empirical rule graph is constructed below as follows:
Suppose that X is a
Find the P(X>25)
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- Historically, the SAT score has unknown distribution with a mean of 1510 points and a standard deviation of 340.5 points. Let X be the SAT score of a randomly selected student and let X be the average SAT score of a random sample of size 14. Explain why the Central Limit Theorem cannot be used. the original population is normally distributed although the sample size is small (n30) O the sample size is large (n>30) although the distribution of the original population is unknownSuppose that a researcher is interested in estimating the mean systolic blood pressure, u, of executives of major corporations. He plans to use the blood pressures of a random sample of executives of major corporations to estimate u. Assuming that the standard deviation of the population of systolic blood pressures of executives of major corporations is 26 mm Hg, what is the minimum sample size needed for the researcher to be 99% confident that his estimate is within 4 mm Hg of u? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements). (If necessary, consult a list of formulas.)The length of life of brand Y light bulbs he length of life of brand x light bulbs is assumed to be N(My> 784). is assumed to be N (aMys 627) and independeat of that of x •If a rs. of n, -56 brand X light bulbs Yielded a mean of =937.4 hours and a r.s. of size nq =57 brandY light bulbs yielded a mean of ỹ- 988.9 a 90% Confidence interval My-My • %3D hoursa Find for
- Assume a variable is normally distributed with a mean of 30 and standard deviation of 6. P(x>32) = Round to three decimal places. NSuppose that a researcher is interested in estimating the mean systolic blood pressure, μ, of executives of major corporations. He plans to use the blood pressures of a random sample of executives of major corporations to estimate μ. Assuming that the standard deviation of the population of systolic blood pressures of executives of major corporations is 26mm Hg, what is the minimum sample size needed for the researcher to be 95% confident that his estimate is within 5mm Hg of μ? Carry your intermediate computations to at least three decimal places. Write your answer as a whole number (and make sure that it is the minimum whole number that satisfies the requirements).The combined SAT scores for the students at a local high school are normally distributed with a mean of 1524 and a standard deviation of 305. The local college includes a minimum score of 1555 in its admission requirements. What percentage of students from this school earn scores that fail to satisfy the admission requirement? P(X < 1555) = % Enter your answer as a percent accurate to 1 decimal place (do not enter the "%" sign). Answers obtained using exact z- scores or z-scores rounded to 3 decimal places are accepted.
- The combined SAT scores for the students at a local high school are normally distributed with a mean of 1491 and a standard deviation of 299. The local college includes a minimum score of 1940 in its admission requirements. What percentage of students from this school earn scores that fail to satisfy the admission requirement? P(X < 1940) = Enter your answer as a percent accurate to 1 decimal place (do not enter the "%" sign). Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.The combined SAT scores for the students at a local high school are normally distributed with a mean of 1484 and a standard deviation of 302. The local college includes a minimum score of 1695 in its admission requirements.What percentage of students from this school earn scores that fail to satisfy the admission requirement?P(X < 1695) = %Enter your answer as a percent accurate to 1 decimal place (do not enter the "%" sign). Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.How do you graph grade curves in StatCruch (finding two bounds within grades; ex. D, C, B)??? In other words, finding two cut off scores? Reference: The mean and standard deviation of last semester’s Test 1 scores are 76.5 and 14.8 respectively. Imagine we want to define letter grades using a Normal distribution (assuming this is appropriate). One possible grade distribution could be that the lowest 10% of students earn F’s, the next 15% earn D’s, the next 50% earn C’s, the next 15% earn B’s, and the rest of the students earn A’s. Using the Normal distribution, calculate the Test 1 scores that would separate these letter grades. Your answer needs to include five Normal graphs from StatCrunch where the shaded area on each graph shows the range of scores needed to earn the specific letter grade. Hint: The graphs for A and F will only have one value as a cutoff score whereas the graphs for a B, C, and D will have two cutoff scores. Which students are happy about their curved grades? Why?…