fill in for standard deviation

Q: Mean 255, x is 230 and z score is -2 find standard deviation

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Q: From 1776-1800, the average age of first marriage for a male in Western Europe was 26.4 years, with…

A: The question is about normal distributionGiven :Average age of first marriage for males ( ) = 26.4…

Q: The average monthly income for employees at a local company is 2413 with a standard deviation of…

A: Mean()=2413standard deviation()=450Employee  makes 1917 per month

Q: Scores on a test have a mean of 86 and a standard deviation of 13. Jerrica has a score of 94.…

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Q: Isn't here the standard deviation equal to 4, not 2, as the tutor wrote?

A: Solution-: Given: μ=-3,σ=4 We want to find, P(0<X<2)=? Draw the picture.

Q: Last weekend, police ticketed 18 men whose mean speed was 113 kilometres per hour (kph), and 32…

A: Given information: Number of men ticketed by police last weekend, n1=18 The mean speed of men was,…

Q: Explain how standard deviation is calculated and how does it play an important role to determining…

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Q: the average grade is 84 with a standard deviation of 4. What is each grade for -1 2 0 1.5 -1.25

A: Given Mean μ=84Standard deviation σ=4 The formula for Z score isZ=X-μσX=Z×σ+μ

Q: Suppose that you have a X= 75 on an exam with Ú=70. Which standard deviation would give you a better…

A: Given : Suppose that you have a X= 75 on an exam with Ú=70

Q: Describe about the Error Variability?

A: The element of variability is produced by factors, such as measurement imprecision, and is not…

Q: Change z-score (-2.00) into X value – Mean = 50, standard deviation = 10

A: Standard normal distribution: The standard normal distribution is a special case of the normal…

Q: Question is describe a type I error

A: In statistical testing type, I error is very important in rejection of the true null hypothesis  or…

Q: Find the estimated mean speed

A: Given Information: Speed (mph) Cars 30-39 7 40-49 16 50-59 51 60-69 16 70-79 10 To…

Q: Describe about mean square between.

A: In ANOVA, “SS” stands for “sum of squares”, “df” stands for degrees of freedom, F is for the test…

Q: newborn babies weigh an average of 7.5 pounds with a standard deviation of 1.25 pounds find the…

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Q: Briefly explain what is measured by the standard error of estimate

A: Given that what is measured by the standard error of estimate.

Q: Assume that at the average age of a population of wild turtles is normally distributed with mean age…

A: In question,  Let X be random variable denoting the age of a population of wild turtles.  Given, X ~…

Q: The human population has a mean IQ score of µ = 100 and a standard deviation of σ = 15. Find the…

A: The normal distribution is the most useful theoretical distribution for continuous variables.…

Q: You find out that respondents to The Knot's survey were recruited from members of TheKnot.com. Do…

A: A survey is a method of collecting data. The purpose of a survey is to collect information from a…