Determine what percentage of your data is within 2 standard deviations of the mean. (Show your calculations). How does this seem to compare with the 68-95 99.7 rule? does this data seem to be normally distributed why or why not?

Q: What is the need of coefficient of dispersion in data analysis? If 25% of the items are less than 10…

A: We have to tell about :  coefficient of dispersion in data analysis. Coefficient of quartile…

Q: 6.11. Suppose you are working with a data set that is normally distributed, with a mean of 200 and a…

A: Population mean, μ=200 Population standard deviation, σ=47

Q: 5.) If you choose 50 companies, what is the probability that the percent gain of the company is…

A:

Q: Practice/Exercises: Solve the following problems. 1. In a given normal distribution, the sample mean…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: Greg is in his first semester at a university and is taking a calculus course with a large…

A:

Q: Q2. Define population in terms of statistics and describe why are samples needed and how are they…

A: It is asked to define the population in terms of statistics and to describe why samples needed and…

Q: 8. mean = 23.8; standard deviation = 5,2

A: The objective is to specify the value of 1σ, 2σ and 3σ above and below the mean, for the given…

Q: What would be the effect on the standard deviation of the set of scores 13, 14,15, 15, 16, and 17 if…

A: We have to find effect of membres on standard deviation.

Q: Horse pregnancies. Bigger animals tend to carry their young longer before birth. The length of horse…

A: 68-95-99.7 rule :  According to 68-95-99.7 rule ,  1) 68% of data falls within the first standard…

Q: how do you calculate the mean and standard deviation without a calculator ?

A: In this question we have to tell that how to find the Mean and Standard deviation without using the…

Q: When data is normally distributed the mean equals the mode. True

A: Normal distribution

Q: Use the data 2, 3, 3, 6, 6, 7. Add 2 to each of the numbers. How does this affect the mean? How does…

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Q: We have provided simple data sets for you to practice the basics of finding a a. population mean. b.…

A: Solution: a. Let X be the random variable. The given data is 1, 2, 4, and 4

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

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Q: Explain what is the error in the following statement. Choose the answer that best describes you.…

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Q: how did you find the standard deviation to be 1.2. explain clearly?

A: Here we have to explain the how we get standard deviation is 1.2

Q: company produces steel rods. The lengths of the steel rods are normally distributed with a mean of…

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: Data is given as per    40,   80,  100.   If the first two are equally important and the third (100)…

A: Given data: 40, 80, 100 First two are equally important and the third (100) is half as important as…

Q: Lisa took 4 courses last semester: Physics, Biology, History, and Calculus. The means and standard…

A: Lisa took 4 courses last semester, we need to convert Lisa's scores into z-scores. Since, z-score =…

Q: O E atistic is | (Round to two decimal places as needed.)

A: For medium lead level: sample size (n1) = 11 sample mean (x̄1) = Σx1 /n1 =999/11 = 90.82 sample…

Q: e. Use Excel's statistical functions, such as "=average", to get the mean, median, range, variance,…

A: Since you have posted a question with multiple sub-parts, we will solve first 3 sub-parts for you.…

Q: How will I calculate population mean using this set of data? Thanks.

A: Given data is : 61159 57524 56186 52254 54884 51869 29743 39877 50086 53672 65707 73861

Q: It takes an average of 10.2 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: From the provided information, The hypotheses are as follow: H0: µ = 10.2 H1: µ < 10.2 The test…

Q: Calculate the sample standard deviation for this data set: 88, 73, 91. The formula for the sample…

A: Given: Data set:88,73,91. n=3 Step 1: The sample mean is calculated as x¯=∑xin=88+73+913=84 Thus,…

Q: Justin got a score of 85 on an GE MMW examination for which the mean is 75. Justin realized that the…

A: Given:Here use the formula;here,  represents the value of Standard Daviation.

Q: mar is trying out to be a firefighter.  On the written exam, the mean of everyone who takes the test…

A: given data, μ=54.5σ=3.1Omar scores exactly 0.75 standard deviations above the mean z=0.75raw score…

Q: Every observation in a data set is multiplied by a constant k. What best describes the effect on…

A: Given : Every observation in a data set is multiplied by a constant k. Let assume observations are :…

Q: The battery life of the new iPad Mini introduced Apple is uniformly distributed between 8.5 and 12…

A: Formula is:

Q: Which one measure of variation should you report for the variable AGE (people write their actual age…

A: The measures of variation are descriptive statistics that determine the spread of the data.

Q: Lecture(10.1a): The mean of the population is 50. The standard deviation is 10. (a) if a persons's…

A:

Q: What method would you use to approximate the percent of women who lie within 2 standard deviations…

A: Given that,   Number of movies(x) frequency(f) f*x 20 25 500 21 10 210…

Q: A data set has a mean of 70.7 and a standard deviation of 6.2. The score of 69, is how many standard…

A:

Q: Q5. Explain the importance of statistics in the field of drug development and the pharmaceutical…

A: Statistics is a significant apparatus in pharmacological examination that is utilized to sum up…

Q: 5. These are the heights of randomly selected graduating undergraduate students in cm. 160 171 171…

A: Let X denotes the height of the students. Then, the mean, variance, and standard deviation are given…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.