Suppose that the mean and standard deviation of the scores in a Statistics exam are 75 and 9.5 respectively. What minimum score
1 answer:
The mean and standard deviation of the scores are 75 and 9.5 respectively.
The z-score is a means to find the probability of getting a particular score. This is calculated to be:
where x is the score, μ is the mean, and σ is the standard deviation.
To be a part of the top 2.5 percent, the probability is:
The z-score for this probability, that is, P
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The first four terms of sequence is 20, -10, -40, -70
<em><u>Solution:</u></em>
Given that we have to find the first four terms of sequence
<em><u>Given recursive formula is:</u></em>
<em><u>To find the first term, substitute n = 1</u></em>
Thus the first term of sequence is 20
<em><u>To find the second term, substitute n = 2</u></em>
Thus the second term of sequence is -10
<em><u>To find the third term, substitute n = 3</u></em>
Thus the third term of sequence is -40
<em><u>To find the fourth term, substitute n = 4</u></em>
Thus the first four terms of sequence is 20, -10, -40, -70