Is the sample mean, calculated from a random sample, an unbiased estimator of the population mean? Explain.

Q: Does the sample median tend to target the population variance

A: If the original distribution is normal, the sample mean will also be normal, with variance , where n…

Q: In what way might an average be missed used? Alternatively, how might an average be misinterpreted?…

A: Average is defined as a single representative of the data . It is always used to describing certain…

Q: How do I interpret the mean 12.5 and the median 12.5 and explain how the mean and the median each…

A: Given: Mean=12.5Median=12.5

Q: 2. Explain the difference between mean and median in a skewed distribution.

A: To explain the difference between mean and median for different types of skewed distribution.

Q: What are requirements for testing a claim about a population mean with a known?

A:

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

A:

Q: The Congressional Budget Office reports that 36% of federal civilian employees have a bachelor's…

A: Given: Number of employees (n) = 115

Q: What is meant by the process of statistics

A: Process of statistics: It involves the following steps.

Q: What is Percentile Rank of an Observation?

A: Percentiles: If the elements in the data set are arranged in ascending order of magnitude, then the…

Q: What is the relationship between the standard deviation of the population and the standard deviation…

A:

Q: If we get a big difference between our sample mean and our population mean, will our test statistic…

A: Given information: The statement is given related to the big difference between x¯ and µ. Formula:…

Q: Is there any skewness suggested by the mean, mode and median of the ungrouped data?

A: Skewness means lack of symmetry. The values of mean, median and mode fall at different points, they…

Q: How would you explain conducting a scatter graph to someone who has never heard of correlation (but…

A: Scatter graph is a graph that is drawn to visualize the relationship between two variables ,x and y,…

Q: Statistics Variable N N* Mean SE Mean StDev Minimum Q1 Median Q3 Maximun length 40 4.150 0.300 1.899…

A: Summary statistics of a data length of species sunfish, bass and carp is given.

Q: What is the sample variance and standard deviation for the data set 9,10,11,33,4 ? Show all work.

A: Given data(x) : 9,10,11,33,4 n = 5 x x2 9 81 10 100 11 121 33 1089 4 16 ∑x=67…

Q: What is the probability that the weighted coin was selected, given that all 3 flips turned up heads?

A: From provided information, the weighted coin yields a heads with probability 0.35. P(Heads|weighted…

Q: The best point estimate of population mean is?

A: Best Point estimation requires the use of survey data to measure a single value (also known as a…

Q: The varaibility of a statistic is described by

A: The variability means the spread ness of the data set. The best measure of spread ness is standard…

Q: Explain what "statistically significant" mean?

A: Introduction: Statistical significance is a statistical concept, as opposed to practical…

Q: what is the standard error (usually standard error of the mean)?

A: Standard error: The standard error of the statistic is defined as the standard deviation of its…