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a. Mean b. Median c. Mode d. All of the above If a positively skewed distributions has a median of 50, which of the following statement is true a. Mean is greater than 50 b. Mean is less than 50 c. Mode is less than 50 d. Mode is greater than 50 e. Both A and C f. Both B and D Which of the following statements are true about the Bessels corrections while calculating a sample standard deviation? a. Bessels correction is always done when we perform any operation on a sample date b. Bessels correction is used when we are trying to estimate population standards deviation from the sample. c. Bessels corrected standard deviation is less biased. i. Only b ii. Only c iii. Both \( b \) and \( c \) iv. Both a and e Explain the differentiate between these terminologies in statistical analysis a systematic error random error and proportional error. Results from six replicate determinations of iron in aqueous samples of a standard solution 6. A method of analysis yields masses of gold that are low by 0.4 mg . Calculate the percent relative error caused by this result if the mass of gold in the sample is 500 mg and 70 mg . 7. Glucose levels are routinely monitored in patients suffering from diabetes. The glucose concentrations in a patient with mildly elevated glucose levels were determined in different months by a spectrophotometric analytical method (table below). The patient was placed on a low-sugar diet to reduce the glucose levels. The following results were obtained during a study to determine the effectiveness of the diet. Calculate the standard deviation and a pooled estimate of the standard deviation for the method.