help with homework questions . I answered but not sure if I'm corrected .

Question 1 3 pts What is the Null and Alternative Hypotheses for the test of the Mean? (a) Ho: H # 65, H1: H = 65 O (b) Ho: H - 65, H1: H . 65 O (c) Ho: H 65 O (d) Ho: H 2 65, H1: H 65 Question 2 9 pts What is the value of the appropriate obtained test statistic that you calculated for the statistical test of the mean? Note: If there are Decimals, Input Answer to 3 Decimal Places. 1.979Scenario 1: The Population Mean for Women's Height is 65" and the Population Standard Deviation is 3.5". A researcher tests whether a new Stretching Machine will significantly increase height in women. The researcher selects a sample of 12 women and has each use the stretching machine for 10 minutes per day for 12 months. At the end of the 12-month period the research measures each woman's height and calculates the sample mean. The sample mean is 67". The researcher wants to maximize the power of the test. The data are presented below. Subject Height (X - M) (X - M)2 1 68 69 W N HOP OHOHN NNWHONH OHOHAS 10 67 11 68 12 67 Mean Height Mean 67 SS 21 SS Height