The problem presents exam scores for two classes. One class uses a point-and-click software program, and the other uses a basic programming language. We need to analyze the data (presumably to determine if there is a statistically significant difference between the two groups, but the exact task is not specified). Since a specific task is not mentioned, I will compute the sample means and sample standard deviations for each group.

Probability and StatisticsDescriptive StatisticsSample MeanSample Standard DeviationData Analysis
2025/4/23

1. Problem Description

The problem presents exam scores for two classes. One class uses a point-and-click software program, and the other uses a basic programming language. We need to analyze the data (presumably to determine if there is a statistically significant difference between the two groups, but the exact task is not specified). Since a specific task is not mentioned, I will compute the sample means and sample standard deviations for each group.

2. Solution Steps

First, list the scores for each group:
Point-and-Click: 82, 82, 62, 77, 84, 82, 76, 61, 65, 75, 98, 62, 92, 68, 56
Programming: 86, 79, 100, 74, 70, 67, 83, 85, 74, 86, 87, 61, 76, 100
Next, we calculate the mean for each group.
The formula for the sample mean xˉ\bar{x} is:
xˉ=i=1nxin\bar{x} = \frac{\sum_{i=1}^{n} x_i}{n}
For the Point-and-Click group, n1=15n_1 = 15:
xˉ1=82+82+62+77+84+82+76+61+65+75+98+62+92+68+5615=11021573.47\bar{x}_1 = \frac{82+82+62+77+84+82+76+61+65+75+98+62+92+68+56}{15} = \frac{1102}{15} \approx 73.47
For the Programming group, n2=14n_2 = 14:
xˉ2=86+79+100+74+70+67+83+85+74+86+87+61+76+10014=11081479.14\bar{x}_2 = \frac{86+79+100+74+70+67+83+85+74+86+87+61+76+100}{14} = \frac{1108}{14} \approx 79.14
Next, calculate the standard deviation for each group.
The formula for the sample standard deviation ss is:
s=i=1n(xixˉ)2n1s = \sqrt{\frac{\sum_{i=1}^{n} (x_i - \bar{x})^2}{n-1}}
For the Point-and-Click group:
s1=(8273.47)2+(8273.47)2+(6273.47)2+(7773.47)2+(8473.47)2+(8273.47)2+(7673.47)2+(6173.47)2+(6573.47)2+(7573.47)2+(9873.47)2+(6273.47)2+(9273.47)2+(6873.47)2+(5673.47)2151s_1 = \sqrt{\frac{(82-73.47)^2 + (82-73.47)^2 + (62-73.47)^2 + (77-73.47)^2 + (84-73.47)^2 + (82-73.47)^2 + (76-73.47)^2 + (61-73.47)^2 + (65-73.47)^2 + (75-73.47)^2 + (98-73.47)^2 + (62-73.47)^2 + (92-73.47)^2 + (68-73.47)^2 + (56-73.47)^2}{15-1}}
s1=72.7609+72.7609+131.5969+12.4609+110.8809+72.7609+6.3009+155.5009+71.7409+2.3409+591.2409+131.5969+343.2409+30.0209+305.180914=2237.441514159.8172512.64s_1 = \sqrt{\frac{72.7609+72.7609+131.5969+12.4609+110.8809+72.7609+6.3009+155.5009+71.7409+2.3409+591.2409+131.5969+343.2409+30.0209+305.1809}{14}} = \sqrt{\frac{2237.4415}{14}} \approx \sqrt{159.81725} \approx 12.64
For the Programming group:
s2=(8679.14)2+(7979.14)2+(10079.14)2+(7479.14)2+(7079.14)2+(6779.14)2+(8379.14)2+(8579.14)2+(7479.14)2+(8679.14)2+(8779.14)2+(6179.14)2+(7679.14)2+(10079.14)2141s_2 = \sqrt{\frac{(86-79.14)^2 + (79-79.14)^2 + (100-79.14)^2 + (74-79.14)^2 + (70-79.14)^2 + (67-79.14)^2 + (83-79.14)^2 + (85-79.14)^2 + (74-79.14)^2 + (86-79.14)^2 + (87-79.14)^2 + (61-79.14)^2 + (76-79.14)^2 + (100-79.14)^2}{14-1}}
s2=47.0596+0.0196+435.7296+26.4196+83.5396+147.3796+14.8996+34.3396+26.4196+47.0596+61.7796+328.9996+9.8596+435.729613=1679.254413129.173411.37s_2 = \sqrt{\frac{47.0596+0.0196+435.7296+26.4196+83.5396+147.3796+14.8996+34.3396+26.4196+47.0596+61.7796+328.9996+9.8596+435.7296}{13}} = \sqrt{\frac{1679.2544}{13}} \approx \sqrt{129.1734} \approx 11.37

3. Final Answer

Point-and-Click: Mean 73.47\approx 73.47, Standard Deviation 12.64\approx 12.64
Programming: Mean 79.14\approx 79.14, Standard Deviation 11.37\approx 11.37

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