1.) A 0.1 significance level is used to test whether or not a house on average has 20 trick-or-treaters visit on Halloween. A random sample of 35 houses were selected and the number of trick-or- treaters were recorded; the average was 23. Assume the population standard deviation is 10 trick-or-treaters. a. Identify the parameter. b. Write down the null and alternative hypothesis. c. What is the value of a? d. Find the critical region/rejection region(draw the curve, shade in the tail(s) ) e. Calculate the test statistic. f. Make a decision/ draw your conclusion. . Write a sentence that identifies what the Type I error would be in this example. h. Write a sentence that identifies what the Type II error would be in this example