Choose all correct answers When we are using the t-distribution to construct a confidence interval, an increase in sample size: Has no effect on the width of the confidence interval, That depends on the sample mean and sample standard deviation Make the confidence interval narrower, because an increase in degrees of freedom it decreases the critical t- value. Makes the confidence interval narrower because it decreases the standard error. Increases the interval width because it akes the standard error larger. Makes the confidence interval wider, because it increases the standard error. Makes the confidence interval wider, because it increases the critical t-value due to a decrease in degrees of freedom