Math 102 Midierm 200pts Directions: Answer all questions by indicating your resp

Question

Math 102 Midierm 200pts Directions: Answer all questions by indicating your response on the optical scantron answer sheet. Choose the best answer. 1. Which measure of central tendency best indicates the average of a distrbution? a) mean b) depends upon the distribution c) mode d) median e)z-score 2. Social Security mumbers used to idenify students are examples of which type of data? a) qualitative b) quantitative c)continuous d) ordinal e) parameters 3. If x is the distribution 5, 8, 13, find x. 4. The misc most preferred by asample of S000 colege students represents a 5. Assume a test was given to 20 students such that 18 of the students received grades a) 26 b) 258 c) 676 d) 5.1 e) none of these a) variance b) statistic c) parameter d) population e) greater than 70 and two received a grade below 10. If the student grades below ten were not counted then which measure of central tendeney would be affected most often? a) mean b) median c) mode d) range e) insufficient information 6. Given a distribution containing five terms with a range of zero. What must be true? a) The mean, median and mode are always zero. b) The mean is zero but the mode and median may not be zero. c) The standard deviation must be zero. d) Both a and c. e) Both b and c. 7. If two distributions have the same measures of central tendency then the one with the greater variability will have: a) the smaler standard deviation b) the larger standard deviation th arger z-score e) the hrger range c) the smaller z-score 8. Which measure indicates the number of standard deviations a score is away from the mean? a) range b) median c)mean d) z-score e) variance 9. A term that is three standard deviations less than the mean of 100 has a z-score of b) 70 c) 97 d) 3 e) insufficient information 10. Which term in a distribution has a z-score of 0? a) mode b) mean cstandard deviation For a distriution u-400 and =25. Determine thez-score for the temn 470. a) 2.8 11. b) 3 c) 70 d) 370 e) none of these

Explanation / Answer

1) Mean is the correct answer

Mean is the best way to measure the central tendency since it is the average of all the samples

2)the data is a quantitative data

3) 52 + 82 + 132 = 25+64+169=258

4)this represents a statistic hence statistic is correct answer

5) Mean because the contribution made by those 2 was very small hence mean will be less if we don't consider those 2 then mean automatically increases

7) if variability is more then Z score is less

8) range

9) 97

10) mean

11)(470-400)/25 = 2.8

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