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Using relevant Excel reports, describe the values for the mean, median, standard deviation and interquartile range of anxiety scores before and after the pandemic. Explain how you decide on the appropriate use of measures of dispersion - standard deviation or interquartile range.
The weight X of grass seed in bags marked 50 lb varies according to a normal distribution with mean 50 lb and standard deviation 1 ounce (0.0625 lb).
A political telephone survey of 260 people asked whether they were in favor or not in favor of a proposed law. Each person was identified as Republican or Democrat. The following contingency table shows the results.
The problem related to Basic Statistics and discuss about the application of ANOVA for data analysis. A statement about longer working hours increasing fatigue in medical staff and the increase in errors has been statistically tested using ANOVA i..
Develop a regression model to predict the cost per person, based on a variable that represents the sum of the ratings for food, décor, and service and a dummy variable concerning location (city versus suburban).
The average weight of the sample is 10.2 g. From past shipments, it is known that the standard deviation of weight among mice is 2 g. Find a 95% confidence interval for the mean weight of all the mice in the shipment.
She now sells another450,000 shares of stock to a venture capitalist for $2 million. What percentage of the firm does Simone now? own?
Imagine that you have conducted a two-sample test and determined that the difference was not statistically significant. While one mean was 4.3
What sampling method did you use? Construct a 95% confidence interval for the true population proportion of the SUV's. What sample size would be needed to ensure an error of +/- 0.025 with 95% confidence?
What results in your departments seem to be correlated or related to other activities? How could you verify this? Create a null and alternate hypothesis for one of these issues. What are the managerial implications of a correlation between these v..
Use the charting tool in Excel to develop a regression model to fit the trend effects using the data below for this scenario.
A corporate executive reports the re- sults of an employee satisfaction survey, stating that 52% of employees say they are either "satisfied" or "extremely satisfied" with their jobs, and then says "the margin of error is plus or minus 4%." Explai..
Consider a sample size of 2 without replacement. Find the mean of the variable x
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