1. What is the effect of a new growth hormone on the weight of rats? To study this question, the researcher selects one newborn rat (as the sample) to receive the hormone. After 10 weeks, this rat weighed X = 961 grams. The researcher compares the sample to the population of laboratory rats: the population reaches an average weight of = 950 grams, = 6 at 10 weeks of age, which forms a normal distribution. A) Assuming a two-tailed test, state null hypothesis (H₀) in a sentence AND in statistical notation:

Assuming a two-tailed test, state research hypothesis (H₁) in a sentence AND in notation:

Find the critical region (z) for 0.05 significance level, two-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):