An aerospace engineer is testing the aerodynamic efficiency of two different winglet designs, Design X and Design Y, across 10 different simulated turbulence intensities in a wind tunnel. For each turbulence level, the drag coefficient ( $Cd×103C_d \times 10^3$ ) is recorded for both designs.

Table 1: Mean drag coefficients and standard deviations

	Design X	Design Y
Mean drag coefficient ( $Cd×103C_d \times 10^3$ )	24.5	21.8
Standard deviation	1.6	1.2

Name an appropriate statistical test that could be used to analyse whether there is a significant difference in the drag coefficients between the two designs. Explain why the test you have chosen is suitable in this case.

Table 1: Mean drag coefficients and standard deviations

	Design X	Design Y
Mean drag coefficient ( $Cd×103C_d \times 10^3$ )	24.5	21.8
Standard deviation	1.6	1.2

Inferential testing (A-level only)

Question 73

Table 1: Mean drag coefficients and standard deviations

Markscheme

Inferential testing (A-level only)

Question 73

Table 1: Mean drag coefficients and standard deviations

Markscheme

Inferential testing (A-level only)

Question 73

Table 1: Mean drag coefficients and standard deviations

Inferential testing (A-level only) Questions

Inferential testing (A-level only)

Question 73

Table 1: Mean drag coefficients and standard deviations

Inferential testing (A-level only) Questions