One measure of the state of the economy is job tenure, the amount of time that employees have worked at the same job. If it is a useful measure, there should be variation between the years when the economy was strong and when it was weak. Random samples of employed wage and salary workers were taken in years 2010, 2012, 2014, 2016, 2018, and 2020. Each respondent listed the number of months that they have been with their current employer. Is there enough evidence to infer that job tenure varied over the decade?