A study was conducted to identify the relationship between the Body Mass Index (BMI) and the time (in minutes) spent to exercise. Which of the following measure is suitable to compare the variability of the two variables? (a) Standard deviation (b) Median (c) Coefficient of variation (d) Interquartile range

Q: Consider the following example for the number of boats per harbor during the monsoon season Number…

A:

Q: On a scale designed to measure attitudes toward immigration, two college classes scored as follows.…

A: Question 8: Class A: The value of mean for class A is, Mean=∑ixiN=4+6+2+1+1+16=156=2.5 Thus, the…

Q: Express the k th percentile, Pk , of a normally distributed variable in terms of its mean, μ, and…

A: The kth percentile represents the area of k to the left of z. Here, the kth percentile is calculated…

Q: the variance and standard deviation are based on the________________?

A: Variance, standard deviation and mean deviation:Variance is the average of squared difference of…

Q: What is the standard deviation of y?

A:

Q: The standard deviation of  sample means is a function of both the standard deviation of the…

A: Solution Standard deviation of a sample mean is equal to Sd/✓n Where sd denote the Standard…

Q: Why is the range much less informative (and much less useful) as a measure of variability than the…

A: Solution-: The problem with using the range as a measure of variability is that it is completely…

Q: If there is a small amount of variation, then the standard deviation is what

A: Standard deviation: It is defined as the positive square root of the variance. It fulfils requisites…

Q: Suppose two sections of the same class take the same exam and produce the results shown in the…

A: The relative frequency distribution of section 1 scores and section 2 scores, are given.

Q: I need help on subpart b - the standard deviation for stock x

A: Given Information: Stock X P(X) -60 0.1 20 0.2 110 0.4 170 0.3 Required: To compute…

Q: Why roles are reserved for the variance and particularly for its square root, the standard…

A: Variance and standard deviation: Variance measures absolute variability in a data set, calculated…

Q: A statistics test has a mean of 60 and a standard deviation of 10 while an accounting test has a…

A: Given information Statistics test Mean µ = 60 Standard deviation σ = 10

Q: the ____ is based on only two scores in a distribution. -deviations  -variance -range -standard…

A: We know that, Deviations refers to the distance between the observations from their corresponding…

Q: a. Range b. Interquartile and Semi-Quartile Range c. Average Deviation

A: As PER  POLICY I HAVE CALCULATED 3 SUBPART ONLY PLZ PEPOST FOR REMAINING PARTS

Q: Which of the following is least affected if an extreme high outlier is added to your data?…

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Q: What is the mode of a distribution of scores for a variable measured by? What is the variance of a…

A: Let us take a small dataset with frequency distribution and understand all the terms with this…

Q: What is another name for the standard deviation of the variable x? What is the reason for that name?

A:

Q: Which of the following is not a measure of dispersion in a set of data? O standard deviation O…

A: Remark:  A measure of dispersion for a data set helps us to know about the spread of the data set.

Q: If the mean exam score of a class was 75%, with a standard deviation of 15%,what percent of students…

A: Given,mean(μ)=0.75standard deviation(σ)=0.15

Q: Which of the farms are unusual (more than two standard deviations from the mean)? S

A: Given that Mean = 1600 And SD = 300 Also the distribution is bell shaped.

Q: Which of the following statistics indicates the extent to which individual measurements in a sample…

A: Median: The median is the middle value in an ordered sequence of data. If there are no ties, half of…

Q: A score that is 6 points below the mean corresponds to a z-score of z = -2.00. What is the…

A: Given: z-score = -2.00 Formula: Where,

Q: Given that the variance for a data set 1.20, what is the standard deviation?

A: The standard deviation is calculated by taking the square root of variance. Variance is given as…

Q: What level of measurement do the variance and standard deviation assume?

A: Variance and standard Deviation tells about the spread or variation in the dataWe calculate the…

Q: In 1970, adults who were 18 years or more had a mean systolic blood pressure (SBP) of 148 mm Hg.,…

A: Given that in 1970 adults who were 18 years or more had a mean systolic blood pressure (SBP) of 148…

Q: The department has decided that all marks from introductory psychology courses should be reported…

A: Here For two different  Distribution Comparison we will Use Standardized statics (Z)..

Q: Find the quartile deviation and coefficient of quartile deviation from the following table.

A: quartile deviation               Q.D = Q3-Q12coefficient of Q.D = Q3-Q1Q3+Q1 for marks arrange the…

Q: Suppose that the variance of a hypothetical population is 49. What is the standard deviation?

A: Solution : Given : σ2 = 49 The variance of the population is denoted by σ2 and standard deviation is…

Q: Q3 :- :- if you know the standard deviation = 3 for measured data, what is the variance ?

A: Given in question  Standard deviation = 3

Q: Which of the following would be the standard deviation used in developing the p-control chart?

A: Given:  Proportion of defective product p= 0.03 Sample size n=30  To find standard deviations used…

Q: The scores on the final exam in a statistics course are close to being normally distributed. The…

A: Normal distribution: It is a continuous probability distribution, that is bell-shaped with lighter…

Q: The lengths of pregnancies in a small rural village are normally distributed with a mean of 262 days…

A: Let X be the lengths of pregnancies in a small rural village x¯=262sd=16 X~ Normal (262, 162)   For…

Q: Which of the following is a measure of dispersion? Standard Deviation Mean Median Correlation Count

A: To find which of the following is a measure of dispersion :-

Q: In a study of 400 people, the mean age is 50 years and the standard deviation of age is 10 years.…

A:

Q: what do the mean deviation, variance and standard deviation all have in common? How is this helpful…

A: Variance, standard deviation and mean deviation:Variance is the average of squared difference of…

Q: 2. What is the difference between the standard deviation and the coefficient of variation? When is…

A: Standard deviation: Stan. deviation shows how far the observations are form the mean of the data.…

Q: Which of the following measures is easily affected by extreme data or values? (A) Median (B Range C)…

A:

Q: An analyst found that the average amount of money in bank accounts at his/her bank is $2,000 with a…

A:

Q: In what percentile is an infant’s body weight of 7 pounds, if infant body weights at that age are…

A:

Q: Calculate the mean deviation (from mean) from the following data :

A: Here use formula of mean deviation

Q: A study of B.A. (Hons.) Economics examination results of 1000 students in 1990 gave the mean grade…

A:

Q: When the correlation between x and y is –1.0, what will the standard deviation of errors be? Why is…

A: * ANSWER :-  Based on the above information the answer is  as follows

Q: The playing life of a Sunshine radio has a Normal distribution with a mean of 600 hours and a…

A: The playing life of a radio is normally distributed with mean 600 hours and standard deviation of…

Q: Interpret the ­z-score of 1.45 in terms of its relationship to standard deviation as well as the…

A: Solution: From the given information, z=1.45.

Q: Two accounting professors decided to compare the variance of their grading procedures. To accomplish…

A: The variance of grading procedure for Professor 1 is σ12 and the variance of grading procedure for…

Q: In a certain company, every worker received a $50-per-week raise. How does this affect the mean…

A: In a certain company, every worker received a $50-per-week raise. The mean salary is the average of…