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What statistical test might you use in order to establish whether a distribution is normal and significant? O a. Spearman's test O b. Kolmogorov-Smirnov test O c. t-test Od. None of the aboveSome data were collected about consumer loyalty towards a (relatively) new brand of toilet roll - 'Wipe-It' (using a scale from 1 = I'd never go back to 10 = I will always purchase this brand). The sample was 15,467 people. When looking at the distribution, a skew of 1.23 (SE = 0.65) was identified. The mean rating was 4.78. What is the z-score for the skew in this data? O a. 1.89 O b. 0.53 O C.-3.92 O d. 3.36The Kolmogorov-Smirnov test can be used to test a. Whether data are normally distributed. O b. Whether group variances are equal. O c. Whether scores are measured at the interval level. O d. Whether group means differ.What information can you deduce from this histogram? Number of FCEs where the primary diagnosis was Parkinson's (G 20) 1400 Finished consultant episodes (FCEs) OFemale Male 1200 1000 008 600 400 200 0 Age (years a. More women than men are diagnosed with Parkinson's disease. O b. The highest incidence of females diagnosed with Parkinson's disease ranges between 75 and 79 years. O C. The highest incidence of females diagnosed with Parkinson's disease ranges between 80 and 84 years. O d. The highest incidence of females diagnosed with Parkinson's disease ranges between 75 and 84 years