Problem 1 Use same problem data for items 15-20population mean = 1.00population standard deviation=

Problem 1 Use same problem data for items 15-20population mean = 1.00population standard deviation= 2.45X = 1.43N = 18Question 15. What is the probability (z score) for this value of X?A) .4325B) .4286C) .4247D) .05Question 16. If alpha were set at .05, is this difference statistically significant?A) YesB) NoC) Can’t tell from the data givenQuestion 17. Which statistical test would tell if the Mean of X were significantly higher than mu?A) Z-testB) t-testC) Null testD) Central Limit TheoremQuestion 18. Unsaved If alpha is set at .05 for this one-tailed test, what are the degrees of freedom?A) 28B)17C) 27D) 18Question 19. What is the tabled, or critical value for this test? Hint: See the table of critical values in the back of the book, and df (degrees of freedom) is N-1.A) 1.740B) 1.734C) 1.701D) 1.64Question 20. Is this difference between the mean of X and mu statistically significant? (Hint, is the calculated t larger than the tabled t value? If yes, it is significant. Question 20 options:A) YesB) NoC) Can’t tell from the data given