ZuoTi.Pro
Question

A computer system uses passwords constructed from the 26 letters (a-z) or 10 integers (0-9). Suppose there are 10,000 users on the system with unique passwords. A hacker randomly selects (with replacement) passwords from the potential set. Round your answers to the nearest integer (a) There are 8,900 users with unique 6-character passwords on the system and the hacker randomly selects 6-character passwords. What is the mean and standard deviation of the number of attempts before the hacker selects a user password? The mean is , and the standard deviation is (b) Suppose there are 1100 users with unique 3-character passwords on the system and the hacker randomly selects 3-character passwords. What is the mean and standard deviation of the number of attempts before the hacker selects a user password? The mean is and the standard deviation isAn assembly consists of three mechanical components, Suppose that the probabilities that the first, second, and third components meet specifications are 0.93, 0.96, and 0.99, Assume that the components are independent. Let Xbe the number of components that meet specifications. Determine the probability mass function of X. Round your answers to five decimal places (e.g. 98.76543) P(X -0) P(X = 1)- P(X = 2) = P(X = 3)-

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
A computer system uses passwords constructed from the 26 letters (a-z) or 10 integers (0-9). Suppose...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • A hacker has programmed their computer to generate, uniformly at random, an eight-character password, with each...

    A hacker has programmed their computer to generate, uniformly at random, an eight-character password, with each character being either one of 26 lower-case letters (a-z), one of 26 upper-case letters (A-Z) or one of 10 integers (0-9). The hacker wants to infiltrate a website that has 2 million users. Assume, for simplicity, that each user is required to use a unique password. i. What is the expected number of attempts before the hacker successfully generates a user password? ii. What...

  • please solve all these questions 4 Customers who are registered on a corporate Web site are...

    please solve all these questions 4 Customers who are registered on a corporate Web site are summarized by the type of shipping contract they use and the number of orders in the previous month. The number of customers in each category are shown in the following table Shipping Contract Express Standard No orders One order More than one order Total Total 25 15 40 65 44 109 44 20 64 134 79 213 Suppose that three customers are selected randomly,...

  • Use Table 8.1, a computer, or a calculator to answer the following. Suppose a candidate for...

    Use Table 8.1, a computer, or a calculator to answer the following. Suppose a candidate for public office is favored by only 47% of the voters. If a sample survey randomly selects 2,500 voters, the percentage in the sample who favor the candidate can be thought of as a measurement from a normal curve with a mean of 47% and a standard deviation of 1%. Based on this information, how often (as a %) would such a survey show that...

  • 1. The access code for a car's security system consists of four digits. be zero and...

    1. The access code for a car's security system consists of four digits. be zero and the last digit must be even. How many different codes are consists of four digits. The first digit cannot many different codes are available? 2. Decide whether each object is a permutation or a combination a) a telephone number b) a social security number c) a hand of cards in poker d) a committee of politicians e) the "combination" on a student gym locker...

  • _ 9) In a sample of 10 randomly selected women, it was found that their mean height was 634 inches. From previous...

    _ 9) In a sample of 10 randomly selected women, it was found that their mean height was 634 inches. From previous studies, it is assumed that the standard deviation, , 124 inches and that the population of height measurements is normally distributed a) Construct the confidence interval for the population mean height of women b) If the sample size was doubled to 20 women, what will be the effect on the confidence interval? 10) 10) The numbers of advertisements...

  • The discussion: 150 -200 words. Auditing We know that computer security audits are important in business....

    The discussion: 150 -200 words. Auditing We know that computer security audits are important in business. However, let’s think about the types of audits that need to be performed and the frequency of these audits. Create a timeline that occurs during the fiscal year of audits that should occur and “who” should conduct the audits? Are they internal individuals, system administrators, internal accountants, external accountants, or others? Let me start you: (my timeline is wrong but you should use some...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT