Suppose that the results of a test were reported as z-scores. What would it mean

Question

Suppose that the results of a test were reported as z-scores. What would it mean if a student's score were zero? The student scored: a) very low b) very high c) average If you had a normal distribution with a mean of 25 and a standard deviation of 5, what proximate percentage of the measures should fall between 20 and 30? a) 34% b) 68% c) 95% d) 99% e) none of the above Which of the following is equivalent to the formula =B17+B18+B19+B20 a) =SUM(B17:B20) b) = T0T(B17:B20) c) =ADD(B7:B20) d) =B17:B20 e) =B17*B20 Suppose you have the formula $D$5*E5 in cell B6 and copy it into cell B7. What will the formula be? a) $D$6*F6 b) $D$5*E5 c) $D$6*F6 d) $D$5*E6 There are many houses for sale in Naples, Florida. Most houses have prices ranging $400,000 to $700,000 in price. However, there are a few houses on the water that have es over $30 million. The distribution of house prices will be a) skewed to the left. b) skewed to the right c) roughly symmetric. If the variance of a set of data is 9. what is the standard deviation? a) 81 b) 18 c) 9 d) 3

Explanation / Answer

1) option C is correct

2)20 and 30 are 1 std deviation from mean hence 68%

option b

3)option a iss correct

4)option d

5)skewed to the right

6)option d

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