Betty recorded the number of visitors at her art gallery during the week:

Day	Visitor
Tuesday	28
Wednesday	20
Thursday	18
Friday	14

She expected to have 20 visitors each day. To determine whether the number of visitors follows a uniform distribution, a chi-square test for goodness of fit should be performed (alpha = 0.10). Using the data above, what is the chi-square test statistic? Answer choices are rounded to the hundredths place.