A population has mean µ = 40 and %3D standard deviation o = 20. What should %3D the sample sizen be in order to give you a standard error for the mean less than 2?

Q: We notice a mean loss of 7 pounds in a sample of 11 dieters, with a standard deviation of three…

A: We first find the critical value for 95% confidence interval

Q: A given distribution has a population mean, μ, of 134 and a population standard deviation, σ, of 7.…

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Q: For a normally distributed population with a mean of 40 and a standard deviation of 5 find P(38 < X…

A: Given Information: Required : To find P(38 &lt; X &lt; 41) Z-score is a measure which indicates…

Q: A random sample of 40 students has a mean annual earnings of​ $3120 and assume that the population…

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Q: What z-score would be associated with the value x = 124?

A: Given that Mean = 133 SD = 6 And the value is X = 124

Q: A given distribution has a population mean, μ, of 121 and a population standard deviation, σ, of 7.…

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Q: What z-score would be associated with the value x = 143?

A: Given that Mean = 137 SD = 15 And the value X = 143

Q: A given distribution has a population mean, μ, of 118 and a population standard deviation, σ, of 8.…

A: Solution: Let X be the random variable with mean µ and standard deviation is σ. Then, the Z-score…

Q: Based on a sample of 25 people, the sample mean GPA was 2.05 with a standard deviation of 0.07 The…

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Q: A variable is normally distributed with a hypothesized population mean of 53 and a standard…

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Q: At a local high school, GPA's are normally distributed with a mean of 2.9 and standard deviation of…

A: Given problem Given that   At a local high school, GPA's are normally distributed with a mean of…

Q: A given distribution has a population mean, μ, of 131 and a population standard deviation, σ, of 14.…

A: Given information Mean = 131 Standard deviation = 14

Q: If the standard deviation of a population is 20 and we take a sample of size 16 from which to…

A: Given information Standard deviation σ = 20 Sample size n = 16

Q: For a sample with a standard deviation S= 12, a score of X = 44 corresponds to a z = -1.00. What is…

A: The z-score of a random variable x is defined as follows: z = (x – x̅)/s. Here, x̅ and s are the…

Q: Q4. The standard deviation of the temperature in a large refridgeratored room should not exceed…

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Q: Given a normally distributed data set whose mean is 35 and whose standard deviation is 6.3, what…

A: The random variable X follows normal distribution. The population mean is 35. The population…

Q: A given distribution has a population mean, μ, of 114 and a population standard deviation, σ, of 12.…

A:

Q: Given population parameters for two populations, population 1 has a mean of 800 and a standard…

A: Given that  Population 1  Mean (μ1) = 800 Standard deviation (σ1) = 40 Population 2 Mean (μ2) =…

Q: When we compute a standard deviation, we are trying to get a measure of the average distance of…

A: Let us understand better by assuming X1, X2, ...., Xn be n data points. Then,…

Q: A given distribution has a population mean, μ, of 113 and a population standard deviation, σ, of 6.…

A: A given distribution has; a population mean(μ)=113 and a population standard deviation(σ)=6 find…

Q: On a recent quiz, the class mean was 76 with a stanbard deviation of 3.1. Calculate the z score (to…

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Q: A given distribution has a population mean, μ, of 106 and a population standard deviation, σ, of 8.…

A:

Q: A given distribution has a population mean, μ, of 125 and a population standard deviation, σ, of 14.…

A:

Q: . For a population with a mean of µ = 70, a score of X = 64 corresponds to z = -1.50. What is the…

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Q: A given distribution has a population mean, μ, of 150 and a population standard deviation, σ, of 6.…

A: Distributions are of 2 types, discrete and continuous. A normal distribution is a continuous…

Q: A population has a mean of 50 and a standard deviation of 20. Would a score of x=70 be considered an…

A: The mean and standard deviation are 50 and 20.

Q: A given distribution has a population mean, μ, of 133 and a population standard deviation, σ, of 15.…

A: A given distribution has a population mean, μ, of 133 and a population standard deviation, σ, of 15.

Q: A given distribution has a population mean, μ, of 117 and a population standard deviation, σ, of 6.…

A: Given data, Mean (μ)=117 sd(σ)=6 If x=172 z=?

Q: In a population, the variable Rain is normally distributed with a mean of 10 and a standard…

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Q: If the coefficient of variation is 1% and the mean is 3.2, determine standard deviation (to four…

A: We have given that Mean(x̅) = 3.2 CV = 0.01

Q: Suppose you were to take samples of size 100 from a population with a mean of 12 and a standard…

A: The formula of the standard error of the mean is,

Q: A given distribution has a population mean, µ, of 106 and a population standard deviation, ơ, of 15.…

A: It is given that Mean = 106, SD = 15 And value x = 134

Q: For a random sample of 9 women, the average resting pulse rate is x̅ = 76 beats per minute, and the…

A: Given: Sample size (n) = 9 Sample mean x¯=76 Sample standard deviation (s) = 5

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, what value…

A: X follows a Normal distribution with mean = 35 and S.D = 7.5 Then z=(x-mean)/SD = (x-35)/7.5…

Q: A given distribution has a population mean, μ, of 108 and a population standard deviation, σ, of 12.…

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Q: What z-score would be associated with the value x = 172?

A: Given that Mean = 112 SD = 10 And value X = 172

Q: For a normally distributed population with a mean of 35 and a standard deviation of 7.5, what value…

A: From the given information, normal distribution with population mean as 35 and standard deviation as…

Q: A given distribution has a population mean, µ, of 110 and a population standard deviation, o, of 15.…

A: The population mean is = 110 And the SD = 15 The value of X is 140

Q: A given distribution has a population mean, μ, of 100 and a population standard deviation, σ, of 9.…

A: From the provided information, Mean (µ) = 100 Standard deviation (σ) = 9 X~N (100, 9)

Q: A sample of n = 25 scores has a mean of M = 40 and a standard deviation of s = 10. What is the…

A: Mean = 40 Standard deviation = 10 Sample size , n = 25

Q: A random normal variable X has a mean of 15500 and a standard deviation of 1500. Find a value of x…

A: Given: μ=15500 and σ=1500 Also, it is given that-PX&gt;x=PZ&gt;z=0.01…

Q: A normally distributed data set has a mean of 0 and a standard deviation of 2. What is the percent…

A: Here I am providing my handwritten solution

Q: The standard deviation of measurements of a linear dimension of a mechanical part is 0.14 mm. What…

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Q: For a population with a mean of ? = 80 and a standard deviation of ? = 12, a score of X = 77…

A: Given : population mean = 80 standard deviation = 12 score of X = 77

Q: In a population that is normally distributed with a mean X and standard deviation Y, determine the…

A: Empirical rules :1) P(μ-σ&lt;X&lt;μ+σ)=68%2) P(μ-2σ&lt;X&lt;μ+2σ)=95%3) P(μ-3σ&lt;X&lt;μ+3σ)=99.7%

Q: A sample of n = 25 scores has a mean of M = 83 and a standard deviation of s = 15.   Explain what is…

A: In this case, the sample size is n = 25, the sample mean is M = 83 and the sample standard deviation…

Q: A given distribution has a population mean, μ, of 145 and a population standard deviation, σ, of 5.…

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Q: An instructor gives his class an achievement test which, as he knows from years of experience,…

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Q: A given distribution has a population mean, μ, of 143 and a population standard deviation, σ, of 6.…

A: we have given that  mean (μ) =143 ,standard deviation(σ)=6   and  ,   X=112 and X ~N(μ=143 ,σ^2 =36)…

Q: For a population with a standard deviation of σ = 12, a score of X = 44 corresponds to z = −0.50.…

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