=+c) Instead of changing the level of confidence, would it be more statistically appropriate to draw a bigger sample?

35. Part-time jobs. Many students have part-time jobs, ranging from a few hours per week to accommodate extra expenditure, to more intensive jobs to partially finance their study. A sample of fifty-one students with part-time jobs studying at a Dutch business school showed a mean salary of $2350 with the sample standard deviation being

$425.