A researcher is interested in the leg strength of males and females. The following statistics (in newtons) are based on male and female samples of measurements of right-leg strength. (Assume the data are normally distributed.)
Males: x1¯= 2127, s1= 513, n1 = 13; Females: x2¯ = 1843, s2 = 446, n2 = 14; df = 23
What t-score (tα/2) should be used to construct a 90% confidence interval for the true mean difference in leg strength between males and females?