Using the demographic information in the table below, consider the following scenario: A teacher chooses a student to dim the lights and a student to shut the door. If a student may do both jobs, determine the following probabilities.

a. P(Both are girls)

b. P(one is a girl and one is a boy)

c. P(at least one is a boy)

       i. Find the probability using cases

      ii. Next, calculate the probability using the complement rule.

d. P (The door closer is a boy)

e. P(neither are seniors)

e. Neither are seniors?

f. Neither are education majors?

A certain type of tomato seed germinates 90% of the time. A gardener planted 25 seeds. a What is the probability that exactly 20 seeds germinate? b What is the probability that 20 or more seeds germinate? c What is the probability that 24 or fewer seeds germinate? d What is the expected number of seeds that germinate?

Let the random variable X follow a normal distribution with ?= 60 and sigma ?2= 81.

a. Find the probability that X is greater than 70.

b. Find the probability that X is greater than 45 and less than 71.

c. Find the probability that X is less than 65.

d. The probability is 0.2 that X is greater than what? number?

e. The probability is 0.03 that X is in the symmetric interval about the mean between which two? numbers?

let the random variable x follow a normal distribution with μ = 50 and σ2 = 64.

a. find the probability that x is greater than 60.

b. find the probability that x is greater than 35 and less than 62

. c. find the probability that x is less than 55.

d. the probability is 0.2 that x is greater than what number?

e. the probability is 0.05 that x is in the symmetric interval about the mean between which two numbers?

et the random variable x follow a normal distribution with μ = 50 and σ² = 64.

a. find the probability that x is greater than 60.

b. find the probability that x is greater than 35 and less than 62 .

c. find the probability that x is less than 55.

d. the probability is 0.2 that x is greater than what number?

e. the probability is 0.05 that x is in the symmetric interval about the mean between which two numbers?

Afund has 10,000 at the start of the year. Six months later, the fund has a value of 15,000 at which time, Stuart removes 5,000 from the fund. At the end of the year, the fund has a value of 10,000. Calculate the exact dollar weighted rate of return less the time weighted rate of return.

Josie needs a data structure that can handle the following operations: push, pop, contains, remove, where contains(Item x) answers whether a given item is in the data structure and remove(Item x) removes the given item from the data structure. How can this be implemented efficiently? (Java)

a. Why is hip movement and turning the knees important in improving a golf swing?

b. During the back swing, are you accelerating?

c. At the moment you reach the bottom of the swing you make contact with the ball. Explain how energy is transferred from the club to the ball

d. Why is there more stress on a golfers shoulders at the start of the swing, than when hitting the ball?

e. Why do you need to follow through on the swing?

f. What has happened when a golf shot is hooked?

g. What is the sweet spot on a club and what does it do?

h. What is a ping sound and how is it produced when hitting a golf ball?

QUESTION 6

1. What is the dotted decimal representation of an 8-bit netmaks?

   a		255.255.255.255
   b		255.0.0.0
   c		255.255.0.0
   d		255.0.0.255
   e		0.0.0.255

10 points   

QUESTION 7

1. If you receive a Request timed out error message when using ping, what would you attempt next?

   a		nmap
   b		metasploit
   c		ipconfig
   d		route
   e		tracert

10 points   

QUESTION 8

1. What does the server generate when a message via SMTP cannot be delivered?

   a		NSA
   b		NDR
   c		HTTPS
   d		LOL
   e		NXDOMAIN

IT'S URGENT!!! Please answer in 15m or less.

WILL BE DEFINITELY UPVOTED!

The Pew study did not report a standard deviation, but given the number of Facebook friends is highly variable, let's suppose that the standard deviation is 199. Let's also suppose that 338 and 199 are population values (they aren't, but we don't know the true population values so this is the best we can do). (Use 3 decimal place precision for parts a., b., and c.)

a. If we randomly sample 108 Facebook users, what is the probability that the mean number of friends will be less than 345?  

b. If we randomly sample 103 Facebook users, what is the probability that the mean number of friends will be less than 311?  

c. If we randomly sample 500 Facebook users, what is the probability that the mean number of friends will be greater than 345?

d. If we repeatedly take samples of n=500 Facebook users and construct a sampling distribution of mean number of friends, we should expect that 95% of sample means will lie between  and  

e. The 75th percentile of the sampling distribution of mean number of friends, from samples of size n=108, is: