A survey of 90 recently delivered women on the rolls of a county welfare department revealed that 27 had a history of intrapartum or postpartum infection. What is the critical value of z if we need to conclude that the population proportion with a history of intrapartum or postpartum infection is less than 0.25.

Q: The height of men in the US in 1950 was normally distributed with u = 177.1 cm and o = 7 cm The 5%…

A: The height of men in the US in 1950 was normally distributed with µ = 177.1 cm and σ = 7 cm.

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Q: A population with a mean of u = 8 has EX = 40. How many scores are in the population?

A: It is given that the mean is 8 and sum of X is 40.

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A: p^m=Xmn

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A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: A researcher reports an F-ratio with df= 2, 18 from an independent-measures research study. Based on…

A: It is an important part of statistics . It is widely used .

Q: What percentage of scores is between a z of ‐2 and a z of +2? Why is this important?

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Q: For a population with µ = 84 and σ = 4, what is the z-score corresponding to X = 80?

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Q: In general, when people diet they typically lose 10 lbs. (?σ = 2). A random sample of 16 people on…

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Q: A population with a mean of μ = 8 has SX = 40. How many scores are in the population?

A: It is given that, the population mean is µ = 6 and ΣX = 40.

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Q: a population with a mean of u=45, a score of X=54 corresponds to z=1.50. What is the population…

A: Given data,Mean μ=45X=54z=1.50Sd σ=?

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Q: for a population with μ = 60 and σ = 8, the X value corresponding to z = 1.50 would…

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Q: For a population with µ = 40 and σ = 8, what is the X value corresponding to z = 1.50?

A: It is given that the mean is 40 and the standard deviation is 8.

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A: Hai

Q: For a population with μ =100 and σ = 20, what is the X value corresponding to z = -0.50?

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Q: A population with a mean of u = 8 has EX 40. How many scores are in the population?

A: From the provided information, Mean (µ) = 8 ∑X = 40

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Q: According to the U.S. Census Bureau, 69% of children under the age of 18 years in the United States…

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