Mathematics, 18.03.2020 01:23 tinaxiao

First Data Corp. records indicate that in 2005, 43% of adult email users received a phishing email. A phishing email replicates an authentic site for the purpose of stealing personal information such as account numbers and passwords. Suppose a random sample of 800 adults will be surveyed on whether they have received phishing emails to determine recent trends.
a. Give the mean and standard deviation of the sample distribution of that.
b. What is the z-score for a 45% probability?
c. What is the probability that more than 45% of those in a survey would have received a phishing email?

Answers: 2

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 18:30, esta54

Angela took a general public aptitude test and scored in the 88th percentile for aptitude in accounting. what percentage of the scores were at or below her score?

Answers: 2

continue

Mathematics, 21.06.2019 19:30, cynthiakk

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible

Answers: 1

continue

Mathematics, 21.06.2019 20:00, rogelionavarro200314

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 + 4x + 5 = 0

Answers: 2

continue

Mathematics, 21.06.2019 20:30, lemusanaisabel6064

What is negative 3/9 times negative 2/8 ?

Answers: 1

continue

You know the right answer?

First Data Corp. records indicate that in 2005, 43% of adult email users received a phishing email....