For a populations mean of 22.3 and standard deviation 4, find the probability that the random variable will take on values greater than 23. Assume that a sample of 64 subjects were drawn at random from the population.
Q: Assume that adults have IQ scores that are normally distributed with a mean of 96.8 and a standard…
A: Let "X" be the IQ score of the adults.
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A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…
Q: A population has a standard deviation of 25 and a mean of 300. Given a random sample of size 100,…
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A: Given that We have to find the probability that a student spent between 5 and 10…
Q: A population has mean µ = 40 and %3D standard deviation o = 20. What should %3D the sample sizen be…
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Q: A population has a mean of 33 and a standard deviation of 5 . What is the probability that the…
A: Population mean=33Population standard deviation=5Sample size n=58
Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…
A: Sample mean (x̅1) = 42.8Sample mean (x̅2) = 40.9Sample size (n1) = 34Sample size (n2) = 41Standard…
Q: A test score in the top 2% is required. The test is designed to have a mean of 100 and a std dev. of…
A: It is given that the test is normally distributed with mean 100 and standard deviation is 15. The…
Q: Part ii) Suppose the number of printers drawn is quadrupled. How will the mean of the sample mean…
A: From the given information, The mean of the distribution is 17.57 ppm and the standard deviation is…
Q: Consider a normal population with a mean of 10 and a variance of 4. Find P(X < 6).
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Q: Find the probability that a randomly selected adult has an IQ greater than 129.9.
A: Let X denote the IQ scores. Given that X follows N(mean = 98.6, SD = 18.5), then Z = (X - mean)/SD…
Q: A sample of 169 is drawn from a certain population. This sample has a mean of 80 and a standard…
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Q: Random samples of size 64 are drawn from a population with mean 32 and standard deviation 5.Find the…
A: Given: Population mean, μ=32Population standard deviation,σ=5Sample size, n=64
Q: Assume that blood pressure readings are normally distributed with a mean of 135 and a standard…
A: According to the given information, we have Mean = 135 Standard deviation = 4.7 Sample size = 35
Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…
A: We are given,μ = 196σ = 22n = 60
Q: The manufacturer of cans of salmon that are supposed to have a net weight of 6 ounces tells you that…
A: Given,sample size(n)=33mean(μ)=5.97standard deviation(σ)=0.1
Q: Assume that a sample is used to test a normal population mean(μ). A sample of size 33 with a mean of…
A: Answer: From the given data, Sample size(n) = 33 mean (X¯) = 26.2 Standard deviation (S) = 5.4 μ =…
Q: A library checks out an average of 332 books per day with a standard deviation of 58 books. The…
A: Given that a library checks out an average of 332 books per day with standard deviation of 58 books.…
Q: Please explain how the 32 was caculated in the problem? I had the same question and got it wrong
A: as we can see is solution No. of coins tossed = 5 P(H)=12 and P(T)=12
Q: A leading magazine reported at one time that the average number of weeks an individual is unemployed…
A: We have given that X~N(mu,sigma ^2) mu=29 ,sigma =3.5 Z-socre =(x-mu)/sigma
Q: During a wisdom teeth removal procedure, 1, 2, 3, or 4 wisdom teeth are removed, depending on the…
A: We have given that, mean (μ) = 3.90 and standard deviation (σ) = 0.88 and sample size (n) = 10
Q: Assume that adults have IQ scores that are normally distributed with a mean of 104.7 and a standard…
A: It is given that the IQ score follows normal distribution with mean 104.7 and standard deviation…
Q: For a population mean of 35, a sample was taken with a mean value of 40 and sample size equal to 30.…
A: Given data,μ=35σ=20x=40n=30P(X>40)=?
Q: he manufacturer of cans of salmon that are supposed to have a net weight of 6 ounces tells you that…
A:
Q: Blood pressure is distribued Normally, with a mean of 85 mm and a standard deviation of 20 mm. As a…
A:
Q: Assume the random variable X is normally distributed with a mean of 50 and a standard deviation of…
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Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…
A: Let be the group runners training for marathons be population 1 and be the individual…
Q: suppose the walking step lengths of an adult males are normally distributed with a mean of 2.7 feet…
A: Given that Mean=μ=2.7 Standard deviation=σ=0.3 Sample size=n=70 X~Normal(μ=2.7,σ=0.3)
Q: A random sample of 25 observations yield a mean of 106 and a standard deviation of 12. What is the…
A: It is given that mean and standard deviation are106 and 12, respectively.By using central limit…
Q: For a normally distributed random variable, the stnadard deviation is 3.7. What us the mean if 10%…
A: Given : Population Standard Deviation,σ = 3.7 test score,x = 31
Q: On a mathematics test in a high school, scores are normally distributed with a mean of 77 and a…
A: Given that. X~N( μ , ?^2 ) μ=77 , ?=16.8 Z-score =( x - μ )/?
Q: When sampling from a population with mean μ and standard deviation σ, the sampling distribution of…
A: Given that Population with mean μ and standard deviation σ
Q: A population has a mean of 75 and a standard deviation of 15. You randomly sample 9 from the…
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Q: Find the probability that a randomly selected adult has an IQ greater than 136.4
A: Let X denote the IQ scores of adults. Given that X follows N(mean = 101.3, SD = 20.2), then Z = (X…
Q: A population of values has a mean of 233.8 and standard deviation of 44.4. Find the probability…
A: Suppose the variable of interest is x.It is given that; x has mean of and the standard deviation…
Q: Consider an experiment in which a coin is tossed thrice. Let X be the number of heads. Find the…
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Q: Imagine a scenario where 100 people complete a self-esteem measure. Assume the standard deviation of…
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Q: Calculate the standard error for a sample mean when the population standard deviation is 221.6 and…
A: Given data N = 36 SD = 221.6
Q: Fran is training for her first marathon, and she wants to know if there is a significant difference…
A: The objective of this question is to test the claim that there is a significant difference between…
Q: Assume the random variable X is normally distributed, with mean p= 44 and standard deviation o = 9.…
A: It is given that mean is 44 and standard deviation is 9.
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- Given a sample with a mean of 151 and a standard deviation of 27, find the probability that a randomly-selected data point from the sample will have a value greater than 158.0.Blood pressure is distribued Normally, with a mean of 85 mm and a standard deviation of 20 mm. As a research pysician you are randomly assigned 100 patients. What is the probability that the average blood pressure for your sample of 100 patients is less than 90 mm?Blood pressure is distribued Normally, with a mean of 85 mm and a standard deviation of 20 mm. As a research pysician you are randomly assigned 100 patients. What is the probability that the average blood pressure for your sample of 100 patients is greater than 82 mm?
- A population is normally distributed with mean 158 and standard deviation 45. A random sample of 56 is taken from the population. Find the standard error?Assume that blood pressure readings are normally distributed with a mean of 122 and a standard deviation of 6.4. If 64 people are randomly selected, find the probability that their mean blood pressure will be less than 124.Blood pressure is distribued Normally, with a mean of 85 mm and a standard deviation of 20 mm. As a research pysician you are randomly assigned 100 patients. What is the probability that the average blood pressure for your sample of 100 patients is less than 84 mm?
- The tread life of a particular brand of tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 2700 miles. What warranty should the company use if they want 96% of the tires to outlast the warranty?A population of values has a mean of 38.5 and standard deviation of 80.4. Find the probability that a sample of 247 values from this population will have a mean between 31.3 and 44.1.To get an unbiased sample variance, we divide by instead of which would give us a estimate of the variance.
- An engineer is going to redesign an ejection seat for an airplane. The seat was designed for pilots weighing between 130 lb and 181 lb. The new population of pilots has normally distributed weights with a mean of 136 lband a standard deviation of 29.6 lb. b. If 38 different pilots are randomly selected, find the probability that their mean weight is between 130 lb and 181 lb.A simple random sample of 1000 observations is taken from a population of 10,000. What is the standard error of the sample mean?The weight of trucks traveling on a particular section of Highway 2H has a population mean of 15.8 tons and a population standard deviation of 4.2 tons. What is the probability a state highway inspector could select a sample of 51 trucks and find the sample mean to be 14.3 tons or less?