Mathematics, 08.01.2020 07:31 Ariellelyn176

1. the expression p(z < 2.87) represents the area under the standard normal curve below a given value of z.

what is p(z < 2.87)?

a. 0.9979

b. 0.0027

c. 0.9973

d. 0.0021

2. the expression p(z > –0.87) represents the area under the standard normal curve above a given value of z.

what is p(z > –0.87)?

express your answer as a decimal to the nearest ten thousandth (four decimal places).

3. the scores on a law school entrance exam are normally distributed with a mean of 250 and a standard deviation of 50. suppose 320 students took the test.

approximately how many students scored above 284?

round your answer to the nearest whole number.

4. 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?

Answers: 2

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 16:20

Browning labs is testing a new growth inhibitor for a certain type of bacteria. the bacteria naturally grows exponentially each hour at a rate of 6.2%. the researchers know that the inhibitor will make the growth rate of the bacteria less than or equal to its natural growth rate. the sample currently contains 100 bacteria.the container holding the sample can hold only 300 bacteria, after which the sample will no longer grow. however, the researchers are increasing the size of the container at a constant rate allowing the container to hold 100 more bacteria each hour. they would like to determine the possible number of bacteria in the container over time.create a system of inequalities to model the situation above, and use it to determine how many of the solutions are viable.

Answers: 1

Answer

Mathematics, 21.06.2019 17:30

Suppose that an airline uses a seat width of 16.516.5 in. assume men have hip breadths that are normally distributed with a mean of 14.414.4 in. and a standard deviation of 0.90.9 in. complete parts (a) through (c) below. (a) find the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.516.5 in. the probability is nothing. (round to four decimal places as needed.)

Answers: 3

Answer

Mathematics, 21.06.2019 21:00

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

Answers: 1

Answer

Mathematics, 21.06.2019 22:30

Which of the functions below could have created this graph?

Answers: 1

Answer

You know the right answer?

1. the expression p(z < 2.87) represents the area under the standard normal curve below a given...