fill in for standard deviation

Q: Help with 4

A: Given points are in an non- linear line. The given points denote as variable sample size chart of x-…

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

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Q: A carpenter buys GHC 500 worth of nails at GHC 50 per pound and GHC 50 worth of nails at GHC 10 per…

A: Harmonic mean: it is defined as the reciprocal of the mean of reciprocals. HM=n∑1X

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: Find the z-score for the value 69, when the mean is 96 snd the standard deviation is 5. z-score= ?

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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: what is the difference of fractile and quantile

A: Difference between fractile and quantile:

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: Explain why it makes sense that the standard deviation of X is in the denominator of the formula…

A: Standard deviation of X merely serve to scale the units of the coefficients and standard errors in…

Q: 5.

A: Given:

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: The average annual rainfall in a town recorded over a century is known to be 90mm with a standard…

A: Solution : Given that, The average annual rainfall in a town recorded over a century is known to be…

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

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Q: What formula is used to find the standard error of mean?

A: we have to give correct formula to find standard error of mean.

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: Determine the standard deviation in the total waiting time.

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Q: Define P-value?

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Q: Describe about the Error Variability?

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

Q: The most commonly used measure of central tendency

A: here use basic of central tendency

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: What would happen to the margin of error if the standard deviation were to decrease? it would…

A: We know that ,Margin of error=critical value ×standard deviation sample sizeMargin of error =Zα2 ×σn…

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: The estimate of the standard error of the mean is computed as?

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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: e, negative, or no correlation. 3.

A: A positive correlation is a relationship between two variables in which both variables move in the…

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…