Need help with standard deviation pls!!

NATIONAL CENTER FOR CASE STUDY TEACHING IN SCIENCE Figure 1. Agar plates of S. aureus or MRSA lawns with antibiotic disks placed on them. "Antibiotic Resistance" by Maureen Leonard inhibition (clear) zone Measure in mm Figure 2. Katelyn's diagram of how to measure a zone of inhibition from her microbiology lab notebook. Exercise1 Measure the zones of inhibition for each antibiotic on the plates shown in Figure 1 and note the measurements in the spaces in Table 1 below. (Note: The Kirby-Bauer method is standardized so that no zone of inhibition is scored as a 0, and all others include the disk as part of the zone. Key: PE = penicillin, ME = methicillin, CE = cephalothin, and VA = vancomycin Plate S. aureus MRSA PE 25 6 ME 10 6 CE 20 VA 15 20 PE 23 ME 18 CE 23 15 VA 18 PE 28 15 ME 13 3 CE VA 10 12 "Antibiotic Resistance" by Maureen Leonard Page 3NATIONAL CENTER FOR CASE STUDY TEACHING IN SCIENCE i( * * ) Standard deviation sn1 Standard error measures the difference between the sample you have taken and the whole population of values. The standard error (SE) is calculated as follows: s Standard error SE Exercise 2 In Table 2 below calculate and record the averages and standard errors for each antibiotic in S. aureus and MRSA. S. aureus M SA Average SE Average SE PE ME CE "Antibiotic Resistance" by Maureen Leonard Page 5NATIONAL CENTER FOR CASE STUDY TEACHING IN SCIENCE VA Exercise 3 Now, redraw Tables 1 and 2 into a single, more organized table. Be sure to label the table appropriately. "Antibiotic Resistance" by Maureen Leonard Page 6