12. The quadratic mean (or root mean square, RMS) is usually used in physical applications. In power distribution systems, for example, voltages and currents are usually referred to in terms of their root mean square value. The quadratic mean of a set of values is obtained by squaring each value, adding the results, dividing by the number of values (n), and then taking the square root of that result, expressed as n RMS = quadratic mean = Find the root mean square of these power supplies (in volts): 82, 110, 99, 35

Q: Suppose there are 20 people in a room and the mean amount of cash held by these 20 people is $15.95…

A: Given, The mean amount of cash held by 20 people in a room is $15.95 per person. Two people enter…

Q: A certain species of plant can have a height between 0 and 100 inches, inclusive. For the first ten…

A: Solution

Q: 3. As part of the National Heath and Nutrition Examination Survey, the Department of Heath and Human…

A: For the paired t-test, the test statistic t=d¯Sn~t(n-1)where, d=difference between two variables…

Q: poll asked adults which activities they had engaged in during the past month. The results are listed…

A:

Q: 12. Show that in finding the arithmetic mean of a set of readings on thermometer it does not matter…

A:

Q: 6. If the data are modified through the equation: Y=0.5X +20, if the mean of the data after…

A: Here, Y=0.5X+20 X=Y+200.5=2Y+20

Q: Which of the following statements best describes the mean of a data set? O The mean is a measure of…

A: Given, From the given statements, we have to describe the mean of a data set.

Q: ind the mean of the data summarized in the given frequency distribution. Compare the computed mean…

A: Solution: The given data is inclusive. To make this as exclusive the value d/2 should be added to…

Q: For certain table which has only been partly reproduced, mean was found to be seltelvab as 1.46. No.…

A: Given data isMean = 1.46 No. of Accidents(x) 0 1 2 3 4 5   Frequency(f) 46 f1 f2 25 10 5 N=200…

Q: The following figure is a histogram of the number of servings of fruit per day claimed by 74…

A: Mean: Mean is the expected value of a set of observations. In other words, mean is he average of the…

Q: 1. Consider the following excerpt from an article: The average person spends Php 2000.00 on…

A: The average amount spent on Valentine's Day gifts last year=Php 2000 Increase in amount from last…

Q: If we add a constant (for example, d) to all data values, how will this affect the geometric mean?…

A: Consider that x1, x2, x3, x4, x5, …. xn, are the data values. Thus, the GM (geometric men) can be…

Q: The boxplot shown below results from the heights (cm) of males listed in a data set What do the…

A: Given a box plot from heights of males listed in a data set. The minimum is the far left hand side…

Q: If a constant 2 is added to each observation of a set, the mean is Select one: O a. 2 times the…

A: Identify the correct option from the group of choices stated   The correct option is identified…

Q: Which of the following is NOT true about the arithmetic mean?

A: Arithmetic mean is often referred to as the mean or arithmetic average. It is calculated by adding…

Q: The 98.6 degree standard for human body temperature was derived by a German doctor in 1868. In an…

A: a)From the histogram shown in the question, the shape of the distribution is approximately…

Q: A student at Tolland High School wondered if boys or girls at her school traveled a greater distance…

A: Solution : Given : n1 = 50 , n2 = 50

Q: Suppose that 7 male students take a survey and are asked for their height (in inches) and their shoe…

A: a)Let x denotes the height. Then, x (x-x) (x-x)2 72 2.14 4.5796 70 0.14 0.0196 68 -1.86…

Q: On a certain exam, Tony corrected 10 papers and found the mean for his group to be 75. Alice…

A: Given: Tony corrected 10 papers and mean for his group is 75 and Alice corrected the remaining 20…

Q: 14. Estimate y; from the following data : 81 and explain why the value obtained is different from…

A: Given that : X and yx  values are given here by using these value we find missing value of yx  at x…

Q: show that the two formulae of the geometric mean are equal?

A: From the given information, Formula for geometric mean is given by;

Q: 4. If the data are modified through the equation: Y=0.3X +20, if the mean of the data after…

A: We have to find mean before modification...

Q: Given x = 0, 1, 2, 3, 4, 5 how is the mean 1.5? Shouldn't the mean of x be 2.5?

A: Measures of Central Tendency: A measure of central tendency represents the central value or typical…

Q: 2- Given a x̅= 1, 000 and s= 100- you are taking a standardized test- what is the minimum score you…

A: According to empirical rule approximately 95% of observations lie within two standard deviation to…

Q: When we add the data value 21 to the original Set A, the data values in this new data set can be…

A: Consider that the random variable x of size n, that is, x1, x2, …, xn. Thus, the mean is defined as…

Q: The geometric mean of 10 observations was calculated as 28.6. It was later discovered that one of…

A:

Q: A laptop manufacturer claims that the mean life of the battery for a certain model of laptop is more…

A: Claim: the mean life of the battery for a certain model of laptop is more than 5 hours.

Q: The following table shows the systolic blood pressure of 5 women and 5 men.   Women 110 120 95…

A: We state the hypothesis for testing difference in means.  H0: There is no significant difference…

Q: The managers of a brokerage firm are interested in finding out if the number of new clients a broker…

A: Solution-: We have following data: Let, X=New clients and Y=Sales Broker X Y 1 27 5.32 2 11…

Q: 2. A student gets the following grades in his seven subjects: 87 for Calculus, 82 for Physics, 79…

A: We have given the following data.

Q: Suppose the doctors at a local office take a health survey of 100 adult female patients with similar…

A: For the 100 participant's  the following are the actual figures : By Physician   By Participants…

Q: Suppose you own shares of a company's stock, the price of which has risen so that, over the past ten…

A: Given data Mean µ= 10.43 Standard deviation σ = 5.60 Z-score P(Z > 0.7964) = 1- P(Z<0.7964) =…

Q: The mean of data set A is 42. The mean of data set B is 47. The mean absolute deviation (MAD) of…

A: The mean of data set A is 42.

Q: The mean of data set A is 42. the mean of data set B is 47. the mean absolute deviation (MAD) of…

A: given dataμA =42μB = 47∴ difference = 47-42 = 5MAD = 2.5

Q: Suppose the mean of Z is 2. What is the mean of Y if a = 1.22 and Y=aZ?  (Use two decimal places,…

A: Suppose the mean of Z is 2. What is the mean of Y if a = 1.22 and Y=aZ? (Use two decimal places, ex:…

Q: Provide in statistical notation the sum of the squared deviations from the mean of a 3 x 4 array of…

A: From the above information, It is required to compute sum of the squared deviation form  the mean of…

Q: All students at Redmond and Power take a certain exam. The mean scores for boys, girls, and for boys…

A: The mean of x with size n is defined as follows: x=∑i=1nxin The combined mean of the two groups with…

Q: Mean in case of Missing Frequency . Calculate the number of students against the class 30-40 of the…

A:

Q: answer this with solution:   The mean monthly salary of 26 male employees is 35,500 while that of…

A:

Q: ho take the Statistics course at Gebze Technical Uni y face to face (before the pandemics) and the…

A: Scatter plot is the diagrammatic representation of the bivariate data, where one variable is plotted…

Q: The boxplot shown below results from the heights (cm) of males listed in a data set. What do the…

A: Given data is

Q: The number of goals for each of a hockey player's seasons is given in the following figure. Find the…

A: Given : Goals : Mean = ∑0Xin Mean = 90020 Mean = 45 Median :  arrange the data in ascending order :…

Q: Suppose that a customer is purchasing a car. He conducts an experiment in which he puts 10 gallons…

A:

Q: Which of the statements correctly describes the relationship between the mean and median in the…

A: The histogram below for the number of servings of fruits per day claimed for 74 seventeen year old…

Q: Geometric Mean GM = VXi. x, • ... = ly X;) - Antily (# E

A:

Q: Which of the following would be an unacceptable level for a Type 2 error in a study?     .80…

A: We have to choose Which of the following would be an unacceptable level for a Type 2 error in a…

Q: The students in Ms. Yuri's class reported the number of hours they watched television last week.…

A:

Q: 20. Fred was told by his teacher that the mean final mark of all the students in his class was…

A: Frequency distribution can be either grouped or ungrouped.

Q: d. If the data is annual salary in the U.S and the population is all legally employed people in the…

A: Correct answer is Negative

Q: , (b) The sum of deviations of a certain number of observations measured from 4 is 72 and the sum of…

A: