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Q: how do i get the standard error

A: Standard error = standard deviation/√n  n = number of observations Standard deviation =…

Q: describe what is measured by the standard error of M?

A: We have to describe what is measured by the standard error of M

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of adults, and those…

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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: The weights of men in their 30s are normally distributed with a mean of 190 pounds and a standard…

A: From the provided information, Population mean (µ) = 190 pounds Population standard deviation (σ) =…

Q: The blood cholesterol levels in 14-year-old boys are approximately normally distributed. Within this…

A: Here we are given that the blood cholesterol levels in 14-year-old boys are approximately normally…

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: to calculate the standard error of the mean what will you need

A: Consider a random variable X, has mean µ and the standard deviation of σ.

Q: The mean weight of babies born in Central hospital last year was 7.2 pounds. Suppose the standard…

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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: If X ~B(190,0.34), find mean and variance of x. (Rounded in 3dp.)

A: X ~B(190,0.34) Given a Binomial Distribution X ~B(n,p) Here, n = 190 , p = 0.34

Q: (a) Find the 45h percentile of the lengths. th (b) Find the 76 percentile of the lengths.

A: (a) The 45th percentile of the lengths is, PX<x=0.45PX-μσ<x-47840=0.45Pz<x-47840=0.45 The…

Q: what would be a good hypothesis for calculating the average speed for cars

A: Introduction Hypothesis is an assumption that is being tested.

Q: The distribution for the time a patient of a medical center spends waiting for an appointment is…

A: Define empirical rule first .  Empirical Rule :  The empirical rule, also referred to as the…

Q: c. The test statistic | (please show your answer to 2 decimal places.) d. The p-value = places.)…

A: C. The pooled estimate is, sp=n1-1s12+n2-1s22n1+n2-2=57-192+42-110257+42-2=8,63697=89.0309=9.4356…

Q: Determine the standard deviation in the total waiting time.

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Q: How does the curve change when the standard deviation is the same and the mean changes?

A: The mean is the center of symmetry of a curve or normal density curve.

Q: Describe about the Error Variability?

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

Q: does the range and standard deviation remain unchanged because the addition of 7 is a constant so…

A: given data  mean = 74 median = 76.5 range = 65 standard deviation = 11 add 7 points to each score…

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: The population standard deviation and sample standard deviation are of the same value if the…

A: We want to tell you above statement is true or false

Q: Explain Mean of the Squared Deviations?

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Q: The United Nations stores statistics about all the live births in the United States. The latest data…

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Q: At 2:00pm a car's speedometer reads 60mph  and at 2:10pm it reads 70mph Use the Mean Value Theorem…

A: Let us consider the function is continuous between two points and the function is differentiable.…

Q: The scores on a test are normally distributed with a mean of 150 and a standard deviation of 30.…

A: The normal distribution:A continuous random variable X is said to follow normal distribution if the…

Q: The average age of senators in the 108th Congress was 62 years. If the standard deviation was 12.5…

A: Solution: Let X be the age of senator. From the given information,

Q: A California lake has been stocked with rainbow trout. These trout have an average length of 24…

A: Given Information: Mean μ=24 Standard deviation σ=3 Someone goes fishing and catches a trout that is…

Q: Check our blood pressure: In a recent study, the Centers for Disease Control and prevention reported…

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Q: Explain the difference between the average rate of change and the instantaneous rate of change.…

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