reshmen at Crescent High School took an algebra t buted normally with a mean of 75 and a standard
Q: et X, has a normal distribution with a mean of 100 and a standard deviation of 4. the z value for X…
A: Given,μ=100σ=4x=80z=?
Q: A prototype automotive tire has a design life of 38,500 miles with a standard deviation of 2,500…
A: Given A prototype automotive tire has a design life which follows a normal distribution with Mean…
Q: Let, X has a normal distribution with a mean of 40 and a standard deviation of 8. The z value for x…
A:
Q: B. Assume that z scores are normally distributed with a mean of 0 and a standard deviation of 1.…
A: 4) P(z>a) = 0.9922
Q: Let X follow a normal distribution with mean 5.3 and unknown standard deviation. If P(X < 11.6) =…
A: From the given information, let X follows a normal distribution with mean of 5.3 and standard…
Q: For any Normal Distribution, approximately . of the observations fall within three standard…
A: Normal distribution is given.
Q: The time (X) to complete a standardized exam is approximately normal with a mean of 70 minutes and…
A:
Q: Let x, has a normal distribution with a mean of 60 and a standard deviation of 4. The z value for x…
A:
Q: Q2: b) For a mean of 70 and a standard deviation of 8, find standardized score for a value of 80.…
A: Givenmean(μ)=70standard deviation(σ)=8x=80
Q: Use the normal distribution of IQ scores, which has a mean of 100 and a standard deviation of 18,…
A: Given that, Mean = 100 Standard deviation = 18
Q: The mean number of milligrams of sodium in a certain brand of dinner is 540mg with a standard…
A: Given Mean=540 Standard deviations=48 Sample size=64
Q: Suppose X has a normal distribution with a mean of 200 and a standard deviation of 40. Find the…
A:
Q: A) has a mean öI 100 and a standar deviation of 10. What is the probability that X will be smaller…
A: We have given that. X~N( μ , ?^2 ) μ =100 , ? =10 Z-score =( x - μ )/?
Q: (a) Find the standard deviation of the combined data (b) Which of the two distributions is more…
A:
Q: The average monthly sales of 2500 firms are normally distributed with mean $30000 and a standard…
A:
Q: A)Calculate the standard error when o=12 and n=4 B) A sample of n=36 nursing students scored a mean…
A: A) Here o = 12 and n = 4 standard error = on= 124=122=6∴Standard error = 6 B) Here given , n=36 and…
Q: Let X has a normal distribution with a mean of 120 and a standard deviation of 20. The z value…
A:
Q: The mean number of jelly beans in a container is 800, with a standard deviation of 40. 80% of the…
A:
Q: Assume that the data has a normal distribution and the number of observations is greater than fifty.…
A: Here, α=0.08. The alternative hypothesis is H1: μ≠ 3.24. That is test is two tailed. Thus, there are…
Q: A random sample of 49 shoppers showed that they spend an average of $23.45 per visit and the…
A: 1. Point estimate of the population mean is the sample mean.
Q: For the standard normal curve, find the z-score that coresponds to the 7" decile. Click to view page…
A: 7th decile is the value such that 70% of the values are less than or equal to this value.
Q: For a normal distribution, find the percentage of data that are (a) Between u – 1.50 and u+ 1.50 %…
A: (a) The percentage of the data that are between μ-1.5σ and μ+1.5σ for a normal distribution is given…
Q: A normal distribution has a mean of u = 80 with o = 20. What score separates the highest 40% of the…
A: It is known that the mean μ=80 and the standard deviation σ=20.
Q: A machinist is making engine parts with an axle diameter of 0.700cm. A random sample of 10 parts…
A: We know that: Where, m=mean, μ=theoritical value, s=standard deviation and n=sample size
Q: Find the z values for each of the following x values for a normal distribution with mean = 30 and a…
A: Given that X~Normal(μ=30 , σ=5) Formula for Z-score Z=(X-μ)/σ
Q: normally distributed with a mean of $39,269 and a standard deviation of $2,550. The probability…
A:
Q: Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1.If…
A: From the given information, Assume that z-scores are normally distributed with a mean of 0 and a…
Q: A prototype automotive tire has a design life of 38,500 miles with a standard deviation of 2,500…
A:
Q: Use R to determine P(3.1<ỹ<5.1) for a Normal distribution with a mean of 4.3 and a standard…
A: Use R programming
Q: A distribution of values is normal with a mean of 220.2 and a standard deviation of Find P16, which…
A: Let P16 = c So, P(X<c)=0.16 we have to find c.
Q: 5 points on his st. The mean was 70 standard deviation atively better on thein
A:
Q: For a normal distribution a mean of 60 and a standard deviation of 10, find the proportion of the…
A: It is given that the mean is 60 and the standard deviation is 10.
Q: T'he mean and standard deviation of a set of 100 observations were worked out as 40 and 5…
A:
Q: The line width for semiconductor manufacturing is assumed to be normally distributed with a mean of…
A:
Q: A normal distribution has a mean of u = 24 with o - 3. What is the minimum score needed to be in the…
A:
Q: An agricultural researcher plants 25 plots with a new variety of yellow corn. Assume that the yield…
A:
Q: For a normal distribution with μ = 30, σ = 5 and z = -2, find the value of x
A: Given, Here, find the value of x.
Q: Given a normal distribution with μ = 50 and σ = 10, find a. the value of x that has 70% of the…
A:
Q: For a normal distribution, find the percentage of data that are: a). Within 1 standard deviation of…
A: The empirical rule, also referred to as the three-sigma rule or 68-95-99.7 rule, is a statistical…
Q: Assume that the readings at freezing on a bundle of thermometers are normally distributed with a…
A:
Q: Assume that x has a normal distribution with the specified mean and standard deviation. Find the…
A: From the given information, Mean = 20 Standard deviation = 3
Q: On an exam with u=52 ,a person scores x=56.Which value for the standard deviation would give this…
A: We have given that, Mean = 52 , X = 56 , We have to find z-score at (1) sigma = 2 (2) sigma = 4…
Q: Use the normal distribution of IQ scores, which has a mean of 130 and a standard deviation of 16,…
A:
Q: The weight, in kilograms, of cereal in a box can be modelled by a normal distribution with Mean u…
A: Standard normal distribution: The standard normal distribution is a special case of normal…
Q: Determine if the following statements are true or false. a) The standard deviation of a normal…
A:
Q: Q2:The mean time taken by all participations to run a road race was found to be 200 minutes with a…
A: Chebyshev's theorem: At least 75% of the observations are lies between two standard deviations,…
Q: Find the probability that z is between two values 0.43 and 0.72. Sketch the normal curve/s neatly.
A: The probability that z is between two values 0.43 and 0.72 is, Using the Excel formula to find the…
Q: Let x has a normal distribution with a mean of 50 and a standard deviation of 8. The z value for x =…
A:
Q: A certain machine makes electrical resistors having a mean resistance of 50 ohms and a standard…
A: According to the given information, we have Mean = 50 Standard deviation = 4
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