There are three other parts, but I have no idea what they are. Any ideas? I am s

Question

There are three other parts, but I have no idea what they are. Any ideas? I am so lost!! Thank you in advance!

H Ch(1) sections 9.1-9.2 Previous 11 12 1314 15 16 17 1819 20Next Question 11 of 25 (1 point) View problem in a pop-up A test is made of H0: ? 18 versus H1 : ? 18. A sample of size n-45 is drawn, and x The population standard deviation is ?-6. 9.2 Section Exercise 35-38 Question 16. Check Answer Solve It Guided Solution Show Example Ask My Instructor Link to Textbook Part 1 out of 4 Compute the value of the test statistic. Round the answer to two decimal places. Save for Later Submit

Explanation / Answer

Solution:

We are given

Sample size = n = 45,

Sample mean = Xbar = 16,

Population mean = µ = 18,

Population standard deviation = ? = 6

Test: H0: µ = 18 vs. H1: µ ? 18 (two tailed)

[Here, we have to use Z test statistic because we are given a value for population standard deviation.]

Formula for test statistic is given as below:

Z = (Xbar - µ) / [?/sqrt(n)]

Z = (16 – 18) / [6/sqrt(45)]

Z = -2/[6/ 6.708204]

Z = -2/ 0.894427

Z = -2.23607

Z = -2.24

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