1. Using the t-Test for mean mu, sigma unknownA used car dealer says that the mean price of used cars sold in the last 12 months is at least $21,000. You suspect this claim is incorrect and find that a random sample of 14 used cars sold in the last 12 months has a mean price of $19,189 and a standard deviation of $2,950. Is there enough evidence to reject the dealer's claim at =0.05? Assume the population is normally distributed.
2. State the null and alternative hypothesis

1. Identify the degree of freedom

1. Determine the critical value by using t-Table

1. Determine the rejection region

1. Find the standardized test statistic

1. Make a decision to reject or fail to reject the null hypothesis