Which of the following shows the approximate relationship between the arithmetic mean and the geometric mean for a series of returns? a. Geometeric mean = (arithmetic mean - variance)/2 b. Geometeric mean = arithmetic mean - variance/2 c. Geometeric mean = (arithmetic mean - standard deviation)/2 d. Geometeric mean = arithmetic mean - (standard deviation)/2

Q: Which of the following would be expected to result in a larger standard error of the mean? a larger…

A:

Q: Find the Mean, Variance, and Standard Deviation (round off to two decimal places)

A: Given: No. of students, n=50 Scores of students 78 95 91 78 91 83 80 99 93 91…

Q: All of the below sets have the same mean.       Set 1-Standard Deviation=3.1       Set 2-Standard…

A:

Q: Suppose you have the population values 50 and 80 and that their corresponding z-scores are -1 and 2.…

A: Given : Suppose population values 50 and 80 and their corresponding Z scores are -1 and 2 ,…

Q: Find the standard deviation of the given data rounded to the nearest hundredth. 3, 4, 5, 7, 10, 12,…

A: Given data is3,4,5,7,10,12,15sample size(n)=7

Q: 4. The following are the number of hours travelled by a senior high school student to go to school…

A: Given that  XX X^2X2 .5 0.25 .25 0.0625 1.4 1.96 1.5 2.25 .85 0.7225 .20 0.04 1.5…

Q: Suppose for a given month, the mean daily closing price for stock A was 107.66 and the standard…

A: Given For A) Mean=107.66 Standard deviations=10.7 For B) Mean=74.11 Standard deviations=7.6

Q: Which of the following is the value of x if in a normal distribution the z – score is -1.25, the…

A: According to the given information, we have Z score = -1.25 Mean = 60 Standard deviation = 9

Q: What percent of data points fall in the range of z=-1.5 and z=1.5 standard deviations of the mean

A: From the provided information, The range is between z = -1.5 to z = 1.5

Q: What is the standard deviation of y?

A:

Q: Which one of the following relation between standard deviation (S.D.) and variance Var (: variable X…

A: What is the relationship between standard deviation and Variance?

Q: An analysis of a data set (N = 16) has revealed that its standard deviation (SD) of 2. Then, what is…

A: GivenN=16standard deviation(SD)=2

Q: If the variance of a particular data set is 7.5820, the standard deviation is

A: We know that variance is the average squared distance from the mean value. And the standard…

Q: 4. Calculate the mean deviation from the following data. What light does it throw on the social…

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Q: A study of commuting times reports the travel times to work of a random sample of 20 employed adults…

A: Given information- Sample size (n) = 20 Sample mean x̅ = 31.25 minutes Sample standard deviation (s)…

Q: Suppose that X has an exponential distribution with a mean of 35. What is P(X<7) ?

A: Given that, The provided mean is β = 35

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

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Q: After you determine the mean annual return, how do you find the standard deviation?

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Q: A firm specializing in the preparation of income tax returns, claims the mean refund for customers…

A: State the hypotheses.

Q: 4. Which of the following distributions has the larger mean? Which has the larger standard…

A: Hey there! Thank you for posting the question.  Since there are multiple questions posted, we will…

Q: Which of the following values for the population standard deviation would cause a score located…

A: Given different values of standard deviation and we need to select the one which makes value of x to…

Q: If Quiz A has a mean of 7.6 and a standard deviation of 2.0 and Quiz B has a mean of 7.9 and a…

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Q: For the binomial​ distribution, which formula finds the standard​ deviation?

A: Consider the terms for any binomial distribution.

Q: Which of the following are the mean and standard deviation of Y?

A: The mean and Standard deviation for random variable X are 5 and 2.3 respectively.

Q: 3) Which of the following is a biased estimator? 3) A) variance B) standard deviation C) mean D)…

A: which of the following is biased estimator

Q: About 68% of the data lie within. standard deviation of the mean One Two Three Four

A: Let X be a random variable follows normal distribution with mean µ and standard deviation σ. X~N (µ,…

Q: Which of the following is not needed to compute a t statistic? a.           A hypothesized value…

A: The value of the population variance or standard deviation is not needed to compute a t statistic.

Q: The quarterly returns for a group of 69 mutual funds with a mean of 3.2% and a standard deviation of…

A: The cut off value for the highest 10% of the funds will be: Thus, the required cut off value is…

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: Suppose you have the population values 50 and 80 and that their corresponding z-scores are-1 and 2.…

A: Given : Suppose the population values 50 and 80 and that their corresponding z scores are -1 and 2…

Q: Is the standard deviation of the sample a good estimate of the variation of salaries of TV…

A: Sample standard deviation is always an unbiased estimate of population sd.

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: 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: is 6% is your standard deviation?

A: Given according to question Sample size(N)=? Confidence =95% Margin of error = 5% Now question says…

Q: Which of the following measure the average deviation of a data set? 1.  sample range   2.  sample…

A: Variance: The average of the square of the deviations taken from the mean is called variance. Sample…

Q: If a number is added to a data set which is far away from the arithmetic mean the what happens to…

A: There are two properties regarding the addition of a number to a data set and its effect on standard…

Q: Which of the following statements is NOT correct about effects of scale changes for a data set? O a.…

A: As a general rule, Standard deviation and Variance will remain the same when we add a constant value…

Q: (O) What is the standard deviation of a distribution that has a mean of 46.2 if a PERFORMANCE value…

A: From the provided information, Mean (µ) = 46.2 Performance value (x) = 28 Z score = -1.24

Q: Which of the following is true? - Lower standard deviation means scores are less varied. - The…

A: Standard deviation is a measure of how spread the data values are.

Q: What is the z-score of x = 3 if it is 2 standard deviation to the left of the mean? O -3 O -2 O -1 O…

A:

Q: In most cases, if you have the variance, how do you compute standard deviation?

A: We have the variance, how do you compute standard deviation.  We use here the formula of variance to…

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

A: Here use formula of mean deviation

Q: Suppose X ~ N(3, 1.2). What value of x is two standard deviations to the right of the mean?

A: from given distribution in question,   mean :-μ=3 standard deviation :-σ=1.2 X is two standard…

Q: If you get a sneak peak at the salary list of your job and realize you are in the lowest bracket,…

A: Let X= salary  Given that X follows a normal distribution with mean= 48000 and standard deviation =…

Q: What value of x is two standard deviation to the right of the mean if X ~ N(10, 1)? O 1 O 2 O 4 0 6…

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Q: Using the same one-tailed test (α = .05), determine if the data indicate that the past four years…

A: From provided information, the number of 90° days form a normal-shaped distribution, with a mean of…

Q: The mean, µ, is (Round to the nearest tenth as needed.) The variance, o², is| (Round to the nearest…

A: Given : The distribution is binomial distribution  and  n = 50 , p = 0.2

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.