Unit 7 Written Assignment HS 4510-01 - Biostatistics Dr. Pankaj Mehrotra May 29, 2024.
Unit 7 Written Assignment
A physiologist wishes to compare the effects of two concentrations of muscle relaxants on the quadriceps muscle in long-distance male runners. After acquiring ethical clearance, the researcher randomly selected 30 male long-distance runners (LDR) from a national list that included all male and female registered LDRs. The researcher later marked a 7mm long muscle on the thigh (the rectus femoris which occupies the middle of the thigh) of each study participant and injects the higher concentration (in the marked muscle area) to 15 of the runners (randomly selected from the 30). The lower concentration is injected into the marked…show more content… The estimate she will be using is the difference in sample means. The results were as follows: the mean muscle length for the high concentration was 14 mm, and for the low concentration, 9.5 mm. The researchers knew from previous large-scale research that the value of the population standard deviation for the effect of the high concentration of the relaxant drug on muscle was: H=0.7 mm, and the population standard deviation for the low concentration was: L=0.6 mm. Prompt from (University of the People, n.d.-c). Q1: Indicate the following: 1. The target population or population of concern for the study The population of concern for this study is male long-distance runners. For this study, 30 runners were randomly selected. 2. What is the difference between a'smart' and a'smart'? The sample frame is. The sampling frame for this study was…show more content… 4. What is the difference between a.. Elaborate on the type of sampling method. Participants were randomly selected from the target population. Because the sampling was random, each male long-distance runner had an equal chance of being selected. Q2: Write a null and an alternative hypothesis for this trial. H0: There will be no difference in the length of the quadriceps in the male long-distance runners in the group that received the higher concentration of relaxant than in the group that received the lower concentration of relaxant. H1: The length of the quadriceps in the male long-distance runners that received the higher concentration of relaxant will be longer than the group that received the lower concentration of relaxant. Q3: Calculate the difference in mean of the two samples. Higher concentration of relaxant (H) = 1: 14 Lower concentration of relaxant (L)= 2: 9.5 1-2 = 14-9.5 = 4.5 Q4: Calculate the standard error for the difference of means. Degrees of freedom = (n1 + n2 - 2), where n is the sample size. df = (15+15-2) = 28 The t value (.05, 28) = 2.048 Is the standard
