Raising Cane's Box Combo with four chicken fingers is advertised to contain a population mean of 7.2 ounces of chicken with a population standard deviation of 0.4 ounces of chicken. Suppose a random sample of n = 30 Box Combos yielded a sample mean of 7.062 ounces and a sample standard deviation of 0.326 ounces. Based on random samples of size n = 30 and assuming the advertised values are true, which of the following is correct? The mean of the sampling distribution of the statistic x bar is equal to 7.062 ounces. The shape of the sampling distribution of the statistic x bar is normal because np and n(1-p) are at least 15. The average sized error that is made when using one sample mean to estimate the true mean ounces is 0.4 ounces. The mean of the sampling distribution of the statistic x bar is equal to 7.2 ounces. The shape of the sampling distribution of the statistic x bar of the true grams is a t-distribution with n-1 degrees of freedom