A supplier says that the average length of a component he produces is 20 cm. In order to test the accuracy of this state

[answerhappygod]

A supplier says that the average length of a component he
produces is 20 cm. In order to test the accuracy of this statement,
6 of the products sent by the supplier were randomly selected and
their lengths were measured (data: 19.2; 18.4; 19.8; 20.2; 20.4;
19). Based on these measurements, it is assumed that the population
distribution is normal. Which of the following is the test
statistic that will be used to test the accuracy of the supplier's
statement at a significance level of 0.1?