Blog

Write the SQ-MUL sequence of the following number. 210110110

Certificate Authorities (CA) issue digital signatures to certify the ownership of public keys

Which of the followings does not share a key when a user wants to access a resource using Kerberos (key server)?

A MAC uses an asymmetric key whereas a digital signature uses a symmetric key

Find the mean for the given sample data. Eileen did some comparative shopping online and found the following six prices for cameras: $123.72       $226.13       $246.62       $288.16       $260.51       $224.39 What is the mean price?  Round your answer to the nearest cent.

WORK MUST BE SHOWN ON THIS QUESTION TO RECEIVE CREDIT. Answer the question, considering an event to be “unusual” if its probability is less than or equal to 0.05. Assume that one student in your class of 29 students is randomly selected to win a prize.  Would it be “unusual” for you to win?  Show mathematically why or why not. P(winning) = [a1] (Round to 3 decimal places). Would it be unusual for you to win?  Explain why or why not. [a2]

WORK MUST BE SHOWN ON THIS QUESTION TO RECEIVE CREDIT. Test the claim that the samples come from populations with the same mean.  Assume that the populations are normally distributed with the same variance. A consumer magazine wants to compare the lifetimes of ballpoint pens of three different types.  The magazine takes a random sample of pens of each type in the following table. Brand 1 Brand 2 Brand 3 260 181 238 218 240 257 184 162 241 219 218 213 Do the data indicate there is a difference in the mean lifetime for the three brands of ballpoint pens?  Use

Solve the problem. In a certain lottery, five different numbers between 1 and 40 inclusive are drawn.  These are the winning numbers.  To win the lottery, a person must select the correct 5 numbers in the same order in which they were drawn.  What is the probability of winning? (Give your answer as a fraction.)  

WORK MUST BE SHOWN ON THIS QUESTION TO RECEIVE CREDIT. Use the empirical rule to solve the problem. The amount of Rachel’s monthly phone bill is normally distributed with a mean of $55 and a standard deviation of $8.  What percentage of her phone bills are between $31 and $79. [a1]%

WORK MUST BE SHOWN ON THIS QUESTION TO RECEIVE CREDIT. Use the given information to find the P-value.  Also, use a 0.05 significance level and state the conclusion about the null hypothesis (reject the null hypothesis or fail to reject the null hypothesis). The test statistic in a right-tailed test is z=0.52. The p-value is [a1]. (Round to three decimal places as needed.) State the correct conclusion about the null hypothesis. [a2]