Below i am attaching 7 questions of Business statistics please solve the question correctly. One of the tutors provided with wrong answer .

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\fQUESTION 10 Which statement is IN ED RRECT? C] The value at the mean times the number of observations equals the sum [if the observations. D The interqua rtile range is found by taking the difference between the 1st and 3rd quartiles and dividing that value by 2. C] In a negativelv skewed distribution, the mean is smaller than the median and the median is smaller than the mode. C] The standard deviation is expressed in terms of the original units of measurement but the variance is not. \fQUESTION 5 Select the CORRECT statements. C] It is us uallv a good idea to have less than 4 classes in a frequency table [or a histogra m}. C] Car speed is an example ofa quantitative variable. C] The coefcient of variation is equal to seem when the mean is E and the standard deviation is 12. C] Given a normal [bell-shaped} distribution with the mean of 12 and the standard deviation of 4. five percent of observations will be above 20. C] Given the variance of 5.?3. the standard deviation is 2.4. QUESTION 6 The measurement scale that allocates values to variables based on their relative ranking With respect to one another in a given data set, but which does not specically quantify the magnitude between successive ranks, is O nominal scale C} intervalscale C} brclinal scale C} ratici scale \fQUESTION 9 1il'lihich statements are CORRECT? C] An automobile insurance agent believes that company "A" is more reliable than company \"B". The scale of measurement that this information represents is the ordinal scale. C] In a histogram, each observation is assigned to one or more classes. C] 11. bar chart is only used to represent ordinal or interval data. C] 11 relative frequency distribution describes the proportion of data values that fall within each category. C] The sum of cumulative relative frequencies always equals 100%