Help wit questions 230

2.5 pts Provide an appropriate response. A random sample of 40 college students has a mean earnings of $3120 over the summer months. Assume the population tandard deviation of earnings over the summer months for college students is $677 and that the distribution of earnings over e summer months for college students is normally distributed. Determine whether a normal distribution or a t-distribution ould be used or whether neither of these can be used to construct a confidence interval. Cannot use normal distribution or t-distribution. Use normal distribution. se a t-distribution. ous