The SAT Scores of Students Are Normally Distributed with a Mean

question 47

Essay

The SAT scores of students are normally distributed with a mean of 950 and a standard deviation of 200.
a.Nancy Bright's SAT score was 1390.What percentage of students have scores more than Nancy Bright?
b.What percentage of students score between 1100 and 1200?
c.What are the minimum and the maximum values of the middle 87.4% of the scores?
d.There were 165 students who scored above 1432.How many students took the SAT?

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Definitions:

Journal

A journal is a detailed account that records all the financial transactions of a business, to be used later for classifying and summarizing into financial statements.

Ledger Accounts

A record in accounting that is used to aggregate monetary transactions by account, monitoring debits and credits over a period.

Journal Entries

The recorded transactions in the financial books of a company, serving as the initial step in the accounting cycle.

T-Accounts

A graphical representation of a general ledger account, showing debits on the left side and credits on the right side to track transactions.