(a) Among the next 210 customers, what are the mean and variance of the number who pay with a debit card?

Q: How would you explain the analysis of variance, assuming that your audience has not had a statistics…

A:

Q: This is a Statistics problem.  Is the sample mean from the Poisson distribution normally…

A: A Poisson distribution is the probability of the number of events that occur in a given interval…

Q: For a strongly skewed right distribution, how are the mean and median different ?

A: It is an important part of statistics. It is widely used.

Q: 4. Explain the logic behind the equations for the mean and standard deviation for grouped data,…

A: A low standard deviation indicates that the data point tend to be very close to the mean ;a high…

Q: What is the variance of following scores: 24, 35. 22, 33, 40, 23, 20, 19, 17?

A:

Q: What is Inferential statistics? why it is used for?

A: Inferential statistics is a branch of statistics that involves the drawing of a conclusion from the…

Q: What is the mean of Class A and B? What are the standard deviation and variance of Class A and B?…

A:

Q: What is the mean, standard deviation and variance of the time the subjects stayed balanced?

A: We have given that, The data of 8 females. The balance times data is, 34, 38, 29, 23, 33, 28, 32,…

Q: What are the examples of Inferential Statistics?

A: Descriptive and inferential statistics: Descriptive statistics concerned with describing the target…

Q: 2) If all of the values in a set of data were doubled, what would happen to the variance?

A: We need to use the concept of variance.

Q: If you were really a television network executive, you would not hire multiple market research firms…

A: Answer : Option (a) ✔️

Q: The z for a sample mean hypothesis test compares a sample mean to another mean. In these situations,…

A: From the above data We are given that the The z for a sample mean hypothesis test compares a…

Q: What is sample variance?

A: In very simple words, Sample variance means the variability in the sample around its average value.…

Q: 3. It reveals the raw score is below the mean average.

A: Given problem Given that   3. It reveals the raw score is below the mean average.

Q: Which kind of descriptive statistics can be included to summarize the quantitative data? if the…

A:

Q: c. Why will the standard deviation not be a good measure of risk when returns are negatively skewed?

A: It is an important part of statistics. It is widely used.

Q: Illustrate the mean or expected value, variance and standard deviation

A: given: x f xf (x- x )2 f*(x- x )2 4 1 4 25 25 5 2 10 16 32 8 2 16 1 2 10 2 20 1 2 13 2…

Q: Suppose you are interested in testing whether the mean earning of men is representative of the…

A: Given info: Suppose you are interested in testing whether the mean earning of men is representative…

Q: What mathematical operations could I do to every score in my distribution list that would have no…

A: Mathematical operation  Adding/subtracting

Q: What statistical calculation, which results in the same units as the measured data, represents the…

A: Introduction: For a random variable X taking n sample values, the sample variance is given by the…

Q: What is variance?

A: Variance is a measure of dispersion or spread of a data distribution. Variance of a data…

Q: What does reject the null and fail to reject the null mean? When is either of these applied?

A: In the hypothesis testing , there are two hypothesis to be tested : null hypothesis &…

Q: What is the mean for the z score distribution?

A:

Q: What is the mean, variance and Standard Deviation?

A:

Q: Suppose Y follows binomial with mean = 20 and variance =7, what is the values of the probability of…

A: Y~Binomial(n,p) Given , E(Y) = 20, Var(Y)=7 E(Y) = np 20=np n=20p Var(Y) = npq 7=npq Put n=20p  in…

Q: Define Correlation and conditional mean?

A:

Q: How is a normal probability plot used to detect outliers?

A: An outlier is an observation that appears to deviate markedly from other observations in the sample.

Q: What is the variance of the following data( 1, 2, 3, 4, and 5)?

A: According to the given information in this question We need to calculate the value of variance

Q: What is meant by the grand mean?

A:

Q: A histogram of a set of data indicates that the distribution of the data is skewed right. Which…

A: Correct Option: C

Q: What does it mean when a score is in the tail of a distribution?

A: The distribution in statistics or probability is the shape in which the data behaves when plotted.…

Q: Explain how you would determine the probability of belonging to the top 5% of a  class. Illustrate…

A: Normal distribution: A continuous random variable X is said to follow normal distribution if the…

Q: Suppose I want to know how many primary care physicians (PCPs) that Americans have had in their…

A: Given data : 1,3,4,6,10,3,2,1,14,11 Arrange in ascending order 1,1,2,3,3,4,6,10,11,14

Q: What is the significance of a z-score?

A: The value of z score tells that how many standard deviations the data is spread away from mean. The…

Q: 3)Which measure of central tendency is the most affected by extremely high or extremely low scores…

A: There are three types of measure of central tendencies. Mean: The mean is the sum of observations…

Q: What are the assumptions when you use a Z score?

A:

Q: What is the mean of a distribution of means that is blank the means of the population?

A: Given problem Given that

Q: what is standard deviation and variance formula in statistics

A: Measure of central tendency measures the central or average value of a dataset. Measured of…

Q: In data analysis, which of the two will you consider the most: Mean or variance? Discuss.

A: Mean is a central tendency,  sum of a collection of numerical data divided by the count of data in…

Q: What is Inferential Statistics in Quantitative research?

A: Statistics consists two parts:  1. Descriptive statistics: This part  of the include description…

Q: (i) What is the mean number of cards held by a person from this group? (ii) What is the variance of…

A: Given: Y   X 0 1 2 3 4 Total 1 0.08 0.13 0.09 0.06 0.03 0.39 2 0.03 0.08 0.08 0.09 0.07…

Q: Find the sum of squares of the deviation from the mean of the series of act scores listed below are…

A:

Q: What is the effect of an increase in variance of the different scores in repeated measure design

A: Given information: It is given that the variance of the different scores is increased in repeated…

Q: What is the difference between random variation and assignable variation?

A:

Q: Suppose you did an experiment with 3 groups and 16 subjects per group. The sample variances in the…

A:

Q: Define Conditional variance?

A:

Q: Suppose that the variance of the sample mean is equals 25 and the sample size is 6 . then the…

A:

Q: Is the mean the measure of central tendency that makes the sum of squared deviations around it…

A: In statistics, the mean is the average of a set of numbers and is the most commonly used measure of…

Q: If the probability of hitting an object is 0.8, what would the variance be?

A: Given problem Given that   If the probability of hitting an object is 0.8, what would the variance…

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.