Question

Make a graph of the distribution of IQ scores for the seventh-grade students in table 1.3. Describe the shape, center, and spread of the distribution as well as any outliers. IQ scores are usually said to be centered at 100. Is the midpoint for these students close to 100, clearly above, or clearly below?

TABLE 1.3 Educational Data for 78 Seventh-Grade Self- OBS Gender concept 123 GPA 8.292 4.643 7.470 8.882 7.585 10.760 9.763 9.410 9.167 9.348 8.167 107 046 115 3.647 3.408 3.936 7.167 7.647 0.530 6.173 7.295 7.295 8.938 7.882 8.353 5.062 8.175 8.235 7.588 050 7.650 008 052 053 054 055 056 057 058 059 060 8.833 7.470 5.528 7.167 7.571 120 102 015 7.822 7.598 4.000 6.231 7.643 020 021 022 062 063 064 065 068 105 1.760 024 026 027 028 029 030 9.648 10.700 10.580 9.429 7.647 5.237 7.825 7.333 072 128 031 032 033 076 077 9.585 7.996 120 107 8.998 8.333 8.175 7.833 4.885 7.998 103 079 080 083 035 036 71 127 038 039 040 087 72 6.057 6.938

Answer 1

Answer:

Make a graph of the distribution of IQ scores for the seventh-grade students in table 1.3. Describe the shape, center, and spread of the distribution as well as any outliers. IQ scores are usually said to be centered at 100. Is the midpoint for these students close to 100, clearly above, or clearly below?

MINITAB used

The shape is approximately bell shaped. The center is around 105. The range is 72 to 136.

The mid point is clearly above 100.

Descriptive Statistics: IQ

Variable	N	Mean	StDev	Minimum	Q1	Median	Q3	Maximum	IQR
IQ	78	108.92	13.17	72.00	103.00	110.00	118.00	136.00	15.00