We wish to develop a confidence interval for the populationmean. The population

We wish to develop a confidence interval for the populationmean. The population follows the normal distribution the standarddeviation of the population is 3 and we have a sample of 10observations. We decide to use the 90 percent level of confidence.The appropriate value of to represent the level of confidenceisa. z =1.65b. z = 1.96c. t = 1.833d. t = 1.812