Pergunta

111. Which of the following statements is correct? A. The range is a measure of central tendency. B. The median is a measure of dispersion. C. For a symmetric distribution, the mean is equal to the median. D. For a skewed distribution, the variance is a negative number. 112. The range and the smallest of a set of numbers are 60 and 3. If the numbers 8.21 , 34 and 70 are included, what will be the range of the new set of numbers? a) 63 b) 67 c) 60 d) Cannot be determine 113. For a positive skewed distribution, which one of the following is correct a) Majority of the values lie to the right of the mean b) Longer tail to the right c) Mean=Mode=Median d) The graph is symmetric about the mean
Solução

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RafaelaMestre · Tutor por 5 anos
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111. The correct answer is C. For a symmetric distribution, the mean is equal to the median. The range is a measure of dispersion, not a measure of central tendency. The median is also a measure of central tendency, not a measure of dispersion. For a skewed distribution, the variance is always a positive number.<br /><br />112. The correct answer is b) 67. The range of a set of numbers is the difference between the largest and smallest numbers in the set. In this case, the range is 60 and the smallest number is 3. If the numbers 8.21, 34, and 70 are included, the new set of numbers will have a range of 70 - 3 = 67.<br /><br />113. The correct answer is b) Longer tail to the right. In a positive skewed distribution, the majority of the values lie to the left of the mean, and the tail of the distribution is longer to the right. The mean is greater than the median, which is greater than the mode. The graph is not symmetric about the mean.
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