4. Ina psychological experiment a memory test was taken by a large number of students. The resulting scores were normally distributed with mean 100 and standard deviation 12. An analysis of 30 of these students gave the following results: Score 98 99 100 101 102 104 105 106 | Frequency 4 8 5 3 2 On this evidence determine whether the standard deviation and mean score of this group was significantly different from 12 and 100, using a 5% level of significance.
4. Ina psychological experiment a memory test was taken by a large number of students. The resulting scores were normally distributed with mean 100 and standard deviation 12. An analysis of 30 of these students gave the following results: Score 98 99 100 101 102 104 105 106 | Frequency 4 8 5 3 2 On this evidence determine whether the standard deviation and mean score of this group was significantly different from 12 and 100, using a 5% level of significance.
MATLAB: An Introduction with Applications
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![4. In a psychological experiment a memory test was taken by a large number of students. The resulting scores were
normally distributed with mean 100 and standard deviation 12. An analysis of 30 of these students gave the
following results:
Score
Frequency
98
99
100
101
102
104
105
106
4
6
8
5
3
2
2
On this evidence determine whether the standard deviation and mean score of this group was significantly different from
12 and 100, using a 5% level of significance.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F95eb6265-420a-4688-b1d2-e7455f624f6e%2F99826493-61a3-4be6-a24e-70bdd2e8a33d%2Fz1x5dho_processed.jpeg&w=3840&q=75)
Transcribed Image Text:4. In a psychological experiment a memory test was taken by a large number of students. The resulting scores were
normally distributed with mean 100 and standard deviation 12. An analysis of 30 of these students gave the
following results:
Score
Frequency
98
99
100
101
102
104
105
106
4
6
8
5
3
2
2
On this evidence determine whether the standard deviation and mean score of this group was significantly different from
12 and 100, using a 5% level of significance.
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