Hello fellow forumers,
Could you please help me solve these problems? This will be submitted on Saturday. Please show the formulas on how did you arrive with the answer.
Thank you Sirs/Madam in advance.
1. The following are the scores made on an intelligence test by a group of children who participated in the experiment:
114 115 113 112 113 132 130 128 122 121 126 117
115 88 113 90 89 106 104 126 127 115 116 109
108 122 123 149 140 121 137 120 138 111 100 116
101 110 137 119 115 83 109 117 118 110 108 134
118 114 142 120 119 143 133 85 117 147 102 117
Construct the frequency distribution table and determine the:
a. Mean b. Median c. Mode
2. A random sample of 100 freshman male students at BUCAL showed an average height of 167.5 cm with standard deviation of 8.6 centimeters. Is there a reason to believe that the average height of the freshman is greater than 162 cm? Use 0.05 level of significance. Assume the populations to be approximately normal with equal variances.
3. The following are the scores made on an intelligence test by female and male children who participated in the experiment
Female 115 113 112 113 132 130 128 122 121 126 117
Male 88 113 90 89 106 104 126 127 115
Test whether there is significant difference in the mean score between female and male children. Assume the populations to be approximately normal with equal variances. Use 5% level of significance
4. An experiment was performed on ten college students to determine the effect of a certain drug on the span of their concentration. The data below represents the time, in minutes, of concentration before fatigue.
Student 1 2 3 4 5 6 7 8 9 10
Before 45 32 58 59 60 44 47 51 42 38
After 47 34 60 57 63 38 49 53 46 41
At 5% level of significance, test whether the drug significantly increase the span of concentration. Assume the populations to be approximately normal with equal variances.
Hi! We are glad that you posted here! This looks like a homework question though. Our homework help policy can be found here. We mainly just want to see what you have tried so far and that you have put some effort into the problem. I would also suggest checking out this thread for some guidelines on smart posting behavior that can help you get answers that are better much more quickly.
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pedro_penduco2013 (04-13-2016)
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