SPSS lab
QUESTION 1
What is the mean income (in thousands), to the nearest tenth? Answers not rounded properly will be counted wrong (they are round off rules, not round off suggestions).
10 points
QUESTION 2
For the Broward County property values, what is the standard deviation? Round to the nearest dollar.
| $158,079 | ||
| $249,881 | ||
| $257,143 | ||
| $116,223 |
10 points
QUESTION 3
For the Broward County property values, what is the mean? Round to the nearest dollar.
| $158,079 | ||
| $116,223 | ||
| $257,143 | ||
| $249,881 |
10 points
QUESTION 4
What is the z-score for an income of 117 (thousand)? Round to the nearest hundredth.
10 points
QUESTION 5
Should the mean or median be used for the measure of central tendency for income? Why?
| Mean, since there are no outliers. | ||
| Median, since there are no outliers. | ||
| Median, since there are several outliers on the upper end. | ||
| Mean, since that's what we always use. |
10 points
QUESTION 6
What is the value of the highest outlier? Do not round.
10 points
QUESTION 7
What is the range? Do not round.
10 points
QUESTION 8
What is the IQR? Do not round.
10 points
QUESTION 9
What is s, to the nearest tenth?
10 points
QUESTION 10
What is the value for Q1? Do not round.
What IQ score identifies the upper boundary of the middle 70% ? Round to the nearest whole number.
10 points
QUESTION 2What IQ score identifies the lower boundary of the middle 70% ? Round to the nearest whole number.
10 points
QUESTION 3What IQ score identifies the top 20% ? Round to the nearest whole number.
10 points
QUESTION 4What IQ scores identifies the bottom 15% ? Round to the nearest whole number.
10 points
QUESTION 5What is the probability that a randomly selected adult has an IQ score between 80 and 110? Round off to 4 decimal places
10 points
QUESTION 6What is the probability that a randomly selected adult has an IQ score greater than 120? Round off to 4 decimal places.
10 points
QUESTION 7What is the probability that a randomly selected adult has an IQ score lower than 90? Round off to 4 decimal places. Answers rounded off incorrectly will be marked wrong. (They are round off rules, not round off suggestions.)
