Is this numerical summary a measure of center or variability? Is this numerical summary best to use for data with symmetric or skewed distributions? Is this numerical summary resistant to outliers or skewness? Mean Standard Deviation Median IQR

Q: The distribution of sample proportions tends to approximate a normal distribution. true or false?

A: The sample proportion is the number of favorable outcomes to the total number of outcomes. It is…

Q: Define how to use t-Statistic in Regression When the Sample Size Is Small? Explain Use of the…

A: The t statistics is divided by its standard error coefficient. The default error is an approximation…

Q: Does a small standard deviation signify more or less uncertainty in the data ? Explain.

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Q: What are the shapes of these distributions? Are they symmetric, left, or right skewed? Are there any…

A: Introduction A box and whisker plot is a graphical representation which shows the variation in the…

Q: Describe about the Properties of the Normal Curve?

A: A normal curve is identified using the values of the mean and standard deviation to show the…

Q: As the true population mean moves away from the hypothesized mean, the power of the test decreases.…

A:

Q: Does the distribution of sample variances tend to be a normal distribution

A: The shape of the sample distribution of sample variance will depend on the shape of the population…

Q: Define and explain the relevance of kurtosis, skewness and standard deviation as descriptive…

A: Kurtosis It is measure of tailedness Skewness It is measure of symmetry SD It is measure of…

Q: It is never ethical to throw out an outlier datum present in a dataset. True False

A: Introduction An outlier is an extreme data value. It can be extremely low or extremely high.

Q: What is a normal distribution in statistics, and how is it used in data analysis? How can you…

A: A normal distribution is a probability distribution that is symmetric around its mean and…

Q: A random sample of 15 college students were asked "How many hours per week typically do you work…

A: The data given is shown below 7 8 16 19 11 31 5 12 14 8 3 12 17 29…

Q: Which are considered to be measures of dispersion, or "measures of spread?" median mean standard…

A: Measure of dispersion are those measure the scatteredness inside the data.

Q: Which one is not measuring the degree to which the scores in a distribution are spread out or…

A: Variance is a measure of dispersion. It measures how far each observation falls from the mean of the…

Q: A box-and-whisker plot does not show the

A: This is a question of theoretical distribution and Box Plot.

Q: What is the difference between a normal and binomial distribution?

A: Statistics uses normal distributions more often than binomial distributions most of the time.…

Q: How do I explain applying the normal curve to a set of test scores?

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Q: The spread or variation in the sampling distribution of means is called the                 of the…

A: Spread or variation in the sampling distribution of means is given.

Q: How does the normal curve allow behavioral scientists to compare different types of scales, tests…

A: First understand normal curve : For normal curve,  the curve is bell-shaped and symmetrical. Zero…

Q: What are the predictor variables in general and what we can observe in general—normal distribution,…

A: Histogram: A simple bar graph of the data where the width bars are the range of the data and the…

Q: What is the significance of the “normal” distribution? Please provide explanation/example.

A: Normal distribution is a probability distribution that is generally symmetric about the mean, as the…

Q: Which measure of central tendency  can be used to describe a distribution at any level of…

A: Nominal level: mode Ordinal level: mode, median Interval level: mode, median, mean

Q: Best way to explain the difference between variance and standard deviation?

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Q: A better explanation of ANOVA and correlation

A: Analysis of variance (ANOVA) is a technique which is used for separating the total variability in a…