math statistics
posted by lora .
For each probability and percentile problem, draw the picture.
A random number generator picks a number from 1 to 9 in a uniform manner.
1) Give the distribution of X.
X =
2) Enter an exact number as an integer, fraction, or decimal.
f(x) = where <=x=>
3) Enter an exact number as an integer, fraction, or decimal.
μ =
4)σ =
5)P(3.25 < X < 7.5) =
6)P(X > 3.67) =
7)P(X > 6  X > 3) =
8)Find the 80th percentile. (Round your answer to one decimal place.)
Thank you
Respond to this Question
Similar Questions

ap stats need help
Continuous Random Variable, I Let X be a random number between 0 and 1 produced by the idealized uniform random number generator described. Find the following probabilities: a.P(0¡ÜX¡Ü0.4) b.P(0.4¡ÜX¡Ü1) c.P(0.3¡ÜX0.5) d.P(0.3(<X<0.5) … 
Statistics and Probability
A computer supply house receives a large shipment of blank CDs each week. Past experience has shown that the number of flaws per CD can be described by the following probability distribution, where the random variable X represents … 
programming
Problem 6.9 Lottery Number Generator A lottery commission offers four different lottery games to play: Threenumber, Fournumber, Fivenumber and Fivenumber + 1 lotteries. Each game has independent numbers. Develop an application … 
Stats
Let Y be a random number between 0 and 1 produced by the idealized uniform random number generator with density curve pictured in the following figure: P(<Y<0.4) = P(0.4<Y<1) = P(0.3<Y<0.5)+ 
Statistics
A large number of children were surveyed. The table below shows the distribution of the time they spent watching TV in the week before the survey. Intervals include the left endpoint but not the right. You can assume that the times … 
Statistics
A large number of children were surveyed. The table below shows the distribution of the time they spent watching TV in the week before the survey. Intervals include the left endpoint but not the right. You can assume that the times … 
math
You roll a number cube numbered from 1 to 6. what is the probability you roll a number divisible by 4? 
Statistics
Shopping Outlet A shopping outlet estimates the probability distribution of the number of stores shoppers actually enter as shown in the table below. x 0 1 2 3 4 p(x) 0.05 0.35 0.25 0.20 0.15 What is the probability that shoppers are … 
Statistics
The probability distribution of number of calls coming to a call center every 15 minute period is shown below. x 5 6 7 8 9 10 11 12 13 p ( x ) 0.02 0.04 0.07 0.08 0.09 0.11 0.12 0.13 0.10 Continued… x 14 15 16 17 18 19 20 p ( x ) … 
Math Probability
Ben is greeting customers at a music store. Of the first 20 people he sees enter the store, 9 are wearing jackets and 11 are not. What is the experimental probability that the next person to enter the store will be wearing a jacket?