Mathematics, 07.04.2020 17:59 nina288

I am confused by these 2 questions.

Use technology or the z-distribution table on pages A-1 to A-2 in the reference guide to solve. (here is the link to the book) https://k12reader. kitaboo. com/k12reader/kitaboo-reflowable. html#/main/https;%7C%7Ck12reader. kitaboo. com%7C72568%7Chtml5%7C72568?readerT ype=new&pageMode=double&pag e=A2

4) The scores on a standardized test are normally distributed with a mean of 500 and a standard deviation of 100. Suppose 6000 students took the test. Approximately how many students scored above 490?
A) 5048

B) 3239

C) 2761

D) 952

5) Lengths of newborn girls are normally distributed with a mean of 49.2 cm and a standard deviation of 1.8 centimeters. Consider a group of 2000 newborn girls. How many girls will be 51 centimeters or shorter?

A) 1683

B) 1856

C) 1928

D) 1964

Answers: 3

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I am confused by these 2 questions.

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