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Identify the Independent and Dependent Variables in the following scenarios 23.The effect of alcohol skin preparation before insulin administration on the incidence of local and systemic infection 24.The effect of regular, active exercise during the last trimester of pregnancy on maternal weight gain and infant birth weight 25.The effect of a weight reduction program on blood sugar control in type 2 diabetics Formulate Ho and H1; Formulate directional H1 for the following studies 26.The effect of alcohol-based solution for skin preparation before insulin administration on the incidence of local and systemic infection 2T.The effect of regular, active exercise during the last trimester of pregnancy on I maternal weight gain and infant birth weight 28.The effect of a weight reduction program on blood sugar control in type 2 diabetics 29. Calculate the z-score z = xsD a. The mean mathematics score for college-bound seniors who took the SAT in 2013 was 514. lfthe standard deviation for this same year was 118, what is the z score for a person who received an SAT mathematics score of 650? 3U.What is the probability of selecting an Ace from a deck of cards? a. 1 I 52 b. 21' 52 c. 3! 52 d. It .-" 52 22. Scenario: A golf club manufacturer has designed a new club and wants to determine if it hits more consistently than the old club (which value tells you this?) Old 7-iron Mean 150.55 Standard Error 0.67 Median 151 Mode 150 Standard Deviation 5.79 Variance 33.55 Kurtosis 0.13 Skewness -0.43 Range 28 a. Minimum - Maximum 134-162 New 7-iron Mean 150.15 Standard Error 0.36 Median 150 Mode 149 Standard Deviation 3.09 Variance 9.56 Kurtosis -0.89 Skewness 0.18 Range 12 b. Minimum - Maximum 144-156standard deviation 17. Researchers collected data on coping in patients. The scores are: 27, 27, 29, 23, 27, 26, 27, 35, 33, 25, 22, 32, 29, 32, 23, 22, 29, 25, 30, 30. They plotted data (below). Which graph is correct? Chart Title 40 35 30 25 20 15 10 un 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 a. Chart Title 12 10 6 0 =25 26-30 31-35 b.d. ratidlevel 12. Round the following to two decimal places (always round at the end of your calculations}: a. 12.4555 5. 13.4105 c. 147812345 d. 15.993? e. 213 13.A bar graph is used with data. a. discrete; continuous 13. ordinal; nominal data, while a histogram is used with c. continuous; discrete d. nominal; ordinal 14.Which of the following is me regarding histograms? a. The class intervals are plotted on the Yaxis. b. The frequency of each interval is represented by the height of the bars. c. The bars are separated from one another. d. They usually represent nominal or ordinal data. 15. ff a distribution is positively skewed, most of the scores occur of the distribution a. on the left side b. on the light side c. in the middle d. on the left and right sides 16. ff our data are nominal; we should use the as a measure of central tendency. mean median mode standard deviation more 1. 1What is the rst step inthe following problem: (6 + 2F+ 12 x 3? a. squarethe number2 b. divide by 12 c. add and 2 d. multiply by 3 Data set: 8, 9, 5, 4, 7, and 8. Find the following: 2. N: away: 4. De: swig1: Data set: 13, 18, and 11. Find the following: a. W25: 7. 2x2: 3X 3_ _ = N 9. E(X 14) = 1D.The US. Census calculates the total population of each state. The number of people in a state is aln) variable. a. nominaHevel b. ordinallevel c. ratidlevel d. intervallevel 11. Researcher decides to use the identier (code) 1 for a woman and 2 fora man in a study. Using numbers to simply identify or label these categories involves variables. nominal-level ordinallevel intervallevel ratiolevel Flore A maintenance project consists of following activities, as outlined in the table below. Table 3 - Precedence Table A . T -_ C A E_ C Required for Task 4 {comments for task 4 should not exceed 50 words in total.) 1. Construct a network diagram by going through the forward and backward passes. You may draw your network diagram in Excel or Word. The network diagram needs to be copied into your Word file. 2. Identify the critical path and duration of the project. 3. Comment on the distinction between critical and non-critical activities