MY NOTES Myasthenia, or chronic muscle fatigue, can be an issue for the elderly that can prevent them from living on their own and contribute to the deterioration of their quality of life. A physical therapist who works predominantly with elderly patients believes that group exercise classes may be more appealing to elderly patients and therefore increase retention in the programs. To gauge the relative effectiveness of these group exercise classes, he performs a pilot study. A random sample of adult men with myasthenia were prescribed two sessions a week consisting of 45 minute group discussions on lifestyle changes followed by 45 minute weighted exercise sessions. As an indicator of overall health, each subjects' grip strength was measured at the start and end of the seven-week study, with higher grip strength indicating better health. The therapist hopes that subjects in the study show improvement in their grip strength across the seven-week program. Let #5 represent the population mean grip strength before participating in prescribed social activities, \"A represent the population mean grip strength after participating in prescribed social activities, and up represent the population mean difference in grip strength (before - after). Which of the following would be the null and alternative hypotheses for this pilot study? OHo:/AD>OandHa:uD=0 0 Ho: MD=Ma-#Aand HaiMDI4A O H0: ME MA and Hal #5 * \"A A pizza company ousted its CEO, who later argued that the quality of pizza had declined since his removal. To test this, a statistician randomly selected 43 volunteers. In a random order, he asked them to eat two slices of pizza created using the old method and two slices of pizza created using the new method. After eating each pair of slices, they were asked to rate the pizza on a scale of 1 to 100. (a) What hypotheses would the statistician test to see if quality had declined since the CEO's removal? 0 H01XD