Hi I need help questions 17 and 18 chapter 8 please help me thanks to problem solve

ample `ll n = 4 years and obtained 1 6. 25. Do the data indicate that the past four* e a two- year's have had significantly more 90 days than would be expected for a random sample from this popula - aple tion ? Use a one-tailed test with a = . 05 . "led test 17 . ) A high school teacher has designed a new course intended to help students prepare for the mathematics action section of the SAT . A sample of ~ = 20 students is ven recruited to for the course and , at the end of the year , ved each student takes the SAT . The average score for ving this sample is M = 562 . For the general population , Ized scores on the SAT are standardized to form a normal distribution with Me = 500 and ` = 100 . med 2 . Can the teacher conclude that students who take - LIE gular the course score significantly higher than the gen - eral population ? Use a one-tailed test with ion of Q = . 01 . 40 . b. Compute Cohen's d to estimate the size of the an of effect . Write a sentence demonstrating how the results of ohol the hypothesis test and the measure of effect size would appear in a research report . 18.) Researchers have noted a decline in cognitive func - Use tioning as people age ( Bartus , 1990 ) . However , the results from other research suggest that the antioxi - dants in foods such as blueberries can reduce and even reverse these age- related declines , at least in laboratory rats ( Joseph et al. , 1999 ) . Based on these 101 1 results , one might theorize that the same antioxi - dants might also benefit elderly humans . Suppose a researcher is interested in testing this theory . The researcher obtains a sample of ~ = 16 adults who are older than 65 , and gives each participant a daily dose of a blueberry supplement that is very high in antioxi- dants . After taking the supplement for 6 months , the participants are given a standardized cognitive skills test and produce a mean score of M = 50 . 2 . For the general population of elderly adults , scores on the test as average M = 45 and form a normal distribution with 0 = 9 . a . Can the researcher conclude that the supplement has a significant effect on cognitive skill ? Use a two - tailed test with a = . 05 . Compute Cohen's d for this study . C. Write a sentence demonstrating how the outcome of the hypothesis test and the measure of effect size would appear in a research report . 19. A researcher is evaluating the influence of a treatment