Publications by Jéssica Montero
Exam - Jéssica Montero
Question 1 The amount of time that it takes to complete a certain job is known to be Normally distributed with a mean of 10 minutes and a standard deviation of 1 minute. Plot the probability density function corresponding to job completion times What is the probability a randomly selected job will be completed in less than 11 minutes? curve(pnorm...
3936 sym R (5048 sym/30 pcs) 6 img
Flipped Assignment 9 - Group 5
Factorial design 2k Question 1 An engineer is interested in the effects of cutting speed A, tool geometry B, and cutting angle C on the life (in hours) of a machine tool. Two levels of each factor are chosen, and three replicates of a 23 factorial design are run. Data knitr::opts_chunk$set(echo = TRUE) A<-rep(c(-1,1,-1,1,-1,1,-1,1),3) B<-rep(c...
1113 sym R (6111 sym/25 pcs) 1 img
Flipped Assignment 6 - Group 5
Question 1 library(lawstat) Aspirin_A <-c(15,26,13,28,17,20,7,36,12,18) Aspirin_B <-c(13,20,10,21,17,22,5,30,7,11) t.test(Aspirin_A, Aspirin_B,paired=TRUE, level=0.05) #reject Ho ## ## Paired t-test ## ## data: Aspirin_A and Aspirin_B ## t = 3.6742, df = 9, p-value = 0.005121 ## alternative hypothesis: true difference in means is not equal t...
407 sym R (2790 sym/10 pcs) 1 img
Flipped Assignment 5 - Group 5
Final decision for electronic components supplier Description: Since our organization ensures the quality of manufactured boards but purchases the electrical components that are mounted on the boards from hundreds of suppliers. There are several electrical components on each board, deviations from designed specifications quickly add up, ultimat...
1107 sym R (2116 sym/10 pcs) 1 img
Assignment 4 - Group 1
Hypothesis testing using R Question 1 A manufacturing plant makes 12V DC motors for large industrial equipment. The management n=100 motors from the process. Specifically, they would like to test whether the mean voltage of the manufactured motors is less than 12V with a 0.05 level of significance. The datafile of collected observations may be f...
1348 sym R (1429 sym/9 pcs)
Pichia sp. preliminary results (strain #2) v1
Materials and methods The strain used was Pichia sp. (strain #2) obtained from Cambrium (Berlin, Germany). A microbial suspension was prepared by growing Pichia sp. strain in tubes containing 10 mL of YPD (glucose) broth overnight at 27 °C for 24 h. Growth kinetics were studied using a YPD (glycerol version) (YPD - G), basal salts fermentation m...
1009 sym R (910 sym/2 pcs) 2 img
Pichia sp. preliminary results (strain #2)
Materials and methods The strain used was Pichia sp. (strain #2) obtained from Cambrium (Berlin, Germany). A microbial suspension was prepared by growing Pichia sp.strain in tubes containing 10 mL of YPD (glucose) broth overnight at 27 °C for 24 h. Growth kinetics were studied using a YPD (glycerol version), basal salts fermentation media prepar...
918 sym R (916 sym/2 pcs) 2 img