1. Does weight loss decrease systolic blood pressure? A physician decides to test this theory on one patient (as the sample). After losing 20 lbs., this patient had a systolic blood pressure of X = 120. The population of overweight individuals tends to have systolic blood pressure of = 140, = 8, a normal distribution. a) Assuming a ONE-tailed test, state research hypothesis (H₁) in a sentence AND in statistical notation:

Assuming a ONE-tailed test, state null hypothesis (H₀) in a sentence AND in notation

Find the critical region (z) for 0.01 significance level, ONE-tailed

Calculate the z-scorefor the sample score (X):

What decision should be made?

Please SUMMARIZE the results of the study in two sentences:

Please INTERPRET the results of the study in sentence(s):

1. Researcher administers a drug to a single patient and uses a hypothesis test to evaluate the effect of the drug. Researcher calculated a z = +2.77 for the patient (Step 3). Assuming the researcher is using a two-tailed test, what decision should the researcher make?(Hint: find critical regions for significance levels.)
2. A) Researcher should reject H₀ with 0.05 significance level, but not with 0.01 significance level.
3. b) Researcher should reject H₀ with either 0.05 or 0.01 significance level.
4. C ) Researcher should fail to reject H₀ with either 0.05 or 0.01 significance level.
5. D) Cannot answer without additional information.