Refer to the accompanying data display that results from a sample of airport data speeds in Mbps Complete parts a through c below Click the icon to view a t distribution table df Type a whole number b Find the critical value to 2 corresponding to a 95 confidence level tx 2 Round to two decimal places as needed c Give a brief general description of the number of degrees of freedom Tinterval a What is the number of degrees of freedom that should be used for finding the critical value t 2 13 046 22 15 x 17 598 Sx 16 01712719 n 50 D OA The number of degrees of freedom for a collection of sample data is the total number of sample values OB The number of degrees of freedom for a collection of sample data is the number of sample values that are determined after certain restrictions have been imposed on all data values OC The number of degrees of freedom for a collection of sample data is the number of unique non repeated sample values The number of degrees of freedom for a collection of sample data is the number of sample values