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How do you find the variance? what are the steps?

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I’m studying for my Statistics class and need an explanation.

How do you find the variance, what are the steps?

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Statistics question/calculation

Statistics question/calculation

StatsI need help with this assignment. I submitted once but my calculations were wrong. Can yhou pleas eshow me in excel how to calculate? Thanks. You
may assume that these respondents represent a simple random sample of
all potential respondents within the community and that the population
is large enough that application of the finite population correction
would not make an appreciable difference in the results. Item C in the description of the data collection
instrument lists variables 7, 8, and 9, which represent the respondent’s
general attitude toward each of the three shopping areas. Each of these
variables has numerically equal distances between the possible
responses, and for purposes of analysis they may be considered to be of
the interval scale of measurement.a. Determine the point
estimate, then construct the 95% confidence interval for = the average
attitude toward Springdale Mall. What is the maximum likely error in the
point estimate of the population mean?b. Repeat part (a) for and , the average attitudes toward Downtown and West Mall, respectively.Given
the breakdown of responses for variable 26 (sex of respondent),
determine the point estimate, then construct the 95% confidence
interval for = the population proportion of males. What is the maximum
likely error in the point estimate of the population proportion?Given
the breakdown of responses for variable 28 (marital status of
respondent), determine the point estimate, then construct the 95%
confidence interval for = the population proportion in the “single or
other” category. What is the maximum likely error in the point estimate
of the population proportion?

Six Sigma (Process Capability)

Six Sigma (Process Capability)

Six Sigma Process Capability <-----Need help/assistance on the following six sigma project. I've attached the entire assignment as well as my excel data(zip files from both tries) for the formula and calculations to give you an idea. 90% of this coursework is done. I am having issues with the process capability portion of the assignment(the 8th tab in excel). This is the only part of the assignment I need completed. I answered two of the questions within the Process Capability Assignment correctly but am having issues with getting the right answers/data on the rest. I have submitted this assignment twice (hence you see two different answers in red) but have been wrong both times. Excel data ---> six_sigma_analysis_2.xlsxsix_sigma_analysis.xlsx

statistics Descriptive analysis

statistics Descriptive analysis

If you cannot show the work, please do not pick up this post. Thank you. If Springdale Mall offered exactly the same benefits as the other two shopping areas, we would expect exactly one-third of those who expressed an opinion to select it as the area best fitting the description for variable number 10 (“Easy to return/exchange goods”). In testing whether Springdale Mall differs significantly from this expected proportion, the null and alternative hypotheses will be . Carry out the following analyses for Springdale Mall:a. Analyzing the data for variable 10, use the preceding null and alternative hypotheses in testing the null hypothesis at the 0.05 level.b. Determine the p-value for the test conducted in part (a).c. Repeat parts (a) and (b) for variables 11–17.d. Based on the preceding analyses, identify the principal strengths and weaknesses exhibited by Springdale Mall.

PSY325: Statistics for the Behavioral & Social SciencesWeek one Discussion

PSY325: Statistics for the Behavioral & Social SciencesWeek one Discussion

Data Analysis
For this discussion, you will organize data sets into meaningful
number groupings, calculate basic descriptive values, and communicate
written critiques of statistical analyses.
This exercise requires the use of a descriptive statistics calculator.
You can find this tool in some versions of Excel (as part of the Analysis ToolPak) or you can use one of the many free online descriptive calculators such as the Descriptive Statistics Calculator by Calculator Soup.
To begin, come up with 20 different data points (that will form a set
of data) and enter them into the first column of an Excel spreadsheet.
The data points can be any numbers you want as long as there are 20 of
them.
You will then use the descriptive statistics option in your
descriptive statistics program or calculator. This is explained in
Chapter 1 of your course text. You should get an output similar to the
image in Figure 1.1.
This output must contain the following values: mean, standard error,
median, mode, standard deviation, sample variance, kurtosis, skewness,
range, minimum, maximum, sum, and count. Address the following points
in your initial post:
Begin your discussion by reporting your results for each of the values listed above.
Based on this output, which single value best describes this set of data and why?
If you could pick three of these values instead of only one, which three would you choose and why?
It is important to note that the answers to these questions may be
different for each of you since you are each using unique sets of data.

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