Male and female populations of elephants under 80 years old are represented by age in the table below. Complete parts (a) through (d). Age 0-9 10-19 20-29 30-39 40-49 50-59 60-69 70-79 Males 11 10 12 20 21 20 17 13 Females 61 10 17 20 21 21 17 13

Q: Why is the standard deviation preferable to the range as a measure of variation?

A: A range is the most common and easily understandable measure of dispersion. It is the difference…

Q: Activity 2 of 3 What percent of Braves players fall between 230 and 270? O A. 95.4% O B. 47.7% O C.…

A: Answer Option c = 68.2% is correct

Q: Round each z-score to the nearest hundredth. A data set has a mean of x = 79 and a standard…

A:

Q: Assume that the results are normally distributed. Pedro took an exam in a class in which the mean…

A: The formula for z-score is z = x - μσ where μ is the mean and σ is the standard deviation.…

Q: Thipi18. The mean of 200 items is 48 and their Standard Deviation is 3. Find: (i) The sum of all the…

A:

Q: Male and female populations of tortoises under 80 years old are represented by age in the table…

A: Here the given table is : Age males females…

Q: tribution of lifetimes of fluorescent lightbulbs. Calculate the shaded area under the curve. Express…

A: Given: Population mean time  μ=5.6 Population standard deviation  σ=1.50000 Let X ~ N(5.6, 1.50)

Q: Yoga mats have lengths with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: Given,mean(μ)=69.0standard deviation(σ)=2.8

Q: The salaries of a company's employees are normally distributed with mean 15000 and standard…

A:

Q: A data set has a mean of x = 217 and a standard deviation of 43. Find the z-score for each of the…

A: We know, in a Normal Distribution, z- score is given as, , where is the mean and  is the standard…

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: A set of exam scores are reported as X values and z-scores. On this exam a score of X = 72…

A: X = 72 corresponds to a z-score = +1.00 and a score of X = 52 corresponds to a z-score = -1.00.  We…

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: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: Given Information: Mean μ=69.0 inches Standard deviation σ=2.8 inches. To find the z-score of a man…

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: Fabienne found the standard deviation of the residuals to be 1.30. Explain this value in context.

A: The standard deviation of the residuals shows that how much the data points spread around the…

Q: The scores on a test are normally distributed with a mean of 110 and a standard deviation of 22.…

A: Let X be the random variable from Normal distribution with mean (μ) = 110 and standard deviation (σ)…

Q: JaJuan want to estimate the average student GPA at his high school. He surveys 37 students and finds…

A: Given,sample size(n)=37sample mean(x¯)=3.33population standard deviation (σ)=0.29

Q: The average age of senators in the 108th Congress was 60.5 years. If the standard deviation was 13.5…

A:

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: 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: In a population of exam scores, a score of X = 88 corresponds to z = 2 and a score of X = 79…

A: From the provided information, A score of X = 88 corresponds to z = 2 A score of X = 79 corresponds…

Q: ou find the standard deviation in the most easiest way?

A: The standard deviation is used to calculate the variability of the data set. It tells us about the…

Q: Listed below are foot lengths in inches for 11 randomly selected people taken in 1988. Find the…

A:

Q: The grades on a geometry midterm at Oak have a mean of u = 74 and a standard deviation of o = 4.0.…

A: Given  mean (μ)=74 and x =70 standard deviation (σ)=4.0 Find the z-score ?

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 amount of time that people spend at Grover Hot Springs is normally distributed with a mean of 70…

A: We are reauthorized to answer three sub parts at a time, since you have not mentioned which part you…

Q: an exam score has a mean of 506 and a standard deviation of 100. What exam score corresponds to a…

A:

Q: Determine which score corresponds to the higher relative position by calculating the z- score for…

A: Calculating The standard normal variate i.e. z-score for 82 marks with mean =70 and standard…

Q: Approximate the standard deviation of age for males. I already know that the population mean is…

A: Given data table is,Agemalesfemales0 - 910510 - 1910720 - 29171630 - 39181640 - 49212250 - 59232560…

Q: Round each z-score to the nearest hundredth. A data set has a mean of  x = 4079  and a standard…

A:

Q: One of the z-score formulas will help on this question. Scores on the SAT test are normally…

A: Given data,Mean μ=500sd σ=100Score X=450z-score =?

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: he scores of adults on an IQ test are approximately Normal with mean 100 and standard deviation 15.…

A:

Q: How standard deviation affects the power?

A: With increase in standard deviation, The observed point will be located far away from the mean.…

Q: We determined the sum of the squared deviations to be Σ(x − x)2 = 21,912.1, and there are n = 10…

A: The sum of the squared deviations is=21912.1n=10

Q: Male and female populations of to under 80 years old are represented by age in the table below.…

A: The question is about frequency distribution.Given :

Q: In a study of speed dating, female subjects were asked to rate the attractiveness of their male…

A: Range of a data set is the difference between the minimum and maximum observations.

Q: The scores on the Accuplacer test and High School GPAS are normally distributed. The Accuplacer test…

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

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,