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Question 590845: How to work this out and I really don't understand it?!
sally needs to throw 6 on a fair dice to start a game. What is the probability that she will not get a 6 with her next throw?
Click here to see answer by jim_thompson5910(28595)

Question 590751: 4. A teacher wishes to determine whether his brightest students (those making the best grades) tend to turn in their tests earlier (because they can recall the material faster) or later (because they take longer to write down all they know) than the others in the class. For a particular test, he observes that the students make the following grades in order of turning their tests in:
Order Grades
1-10 94 70 85 89 92 98 63 88 74 85
11-20 69 90 57 86 79 72 80 93 66 74
21-30 50 55 47 59 68 63 89 51 90 88
If the teacher counts those making a grade of 90 and above as his brightest students, then at a 5 percent level of significance, can he conclude the brightest student turned their tests in randomly?

Click here to see answer by stanbon(57377)

Question 590883: fourteen people are entered in a race. if there are no ties, in how mant ways can the first three places come out
Click here to see answer by stanbon(57377)

Question 590929: I Roll a six-sided Dye one time. What is the probability that I'll get any number other than 4?
Click here to see answer by jim_thompson5910(28595)

Question 590996: Lisa has a set of 10 cards, nummbered 1 through 10. if she picks a card at random, what is the proboblility that the card will be 8?

Click here to see answer by edjones(7569)

Question 590932: 1. The probability that a bulb produced by a factory will fuse after certain period of time is 0.05. Find the probability that out of 5 such bulbs
a. None fuses
b. Not more than 2 fuse
c. More than 2 fuse

Click here to see answer by edjones(7569)

Question 591286: Three cards are selected from a standard deck of cards, without replacement, what’s the probability that all are black cards?

Click here to see answer by jim_thompson5910(28595)

Question 591323: Coach Thomas is trying to figure out how to arrange his top 4 hitters. How many different ways can he arrange the batters?
Click here to see answer by jim_thompson5910(28595)

Question 591402: In a car race there are 6 chevy's, 4 fords, and 2 pontiacs. How many different ways can the 12 cars finish if we consider the make of the cars only?
Click here to see answer by scott8148(6628)

Question 591391: A newspaper article claims that 44% of all airplanes arriving at Piarco Airport are late. Seven(7) flights are randomly selected.
(a) Define the variable of interest. [1]
(b) State clearly the appropriate distribution for this scenario. Justify your answer. [5]
(c) Find the probability at least 1 flight will arrive late. [4]

Click here to see answer by stanbon(57377)

Question 591374: A car electronics store sells 6 different radios, 10 different CD players, and 8 different speaker packages. In how many ways can you choose a radio, CD player, and a speaker package for your car?
Click here to see answer by stanbon(57377)

Question 591371: If one person is randomly selected from a class that has 6 sophmores, 12 juniors, and 7 seniors, find the probability that the person selected is a senior
Click here to see answer by stanbon(57377)

Question 591290: My Stat 154 class, let mean score is 78 and standard deviation is 7. I would like to award A to top 10% students. Find the minimum score student should get in order to get A in my class
Click here to see answer by stanbon(57377)

Question 591370: A single card is drawn from a standard deck of 52 cards. Find the probability the card is:
1. A red four
2. A heart
3. A 4 or a heart.
4. Not a club.
5. A red or a four
6. A red and a 3
Click here to see answer by Edwin McCravy(8909)

Question 591485: The second period class was asked what was there favorite pizza topping? The chart shows the results.
Hamburger 7
Pepperoni 8
Supreme 3
Cheese 12
If 180 students were asked about their favorite pizza, how many should you predict would choose cheese?
Click here to see answer by derangoj(14)

Question 591497: Two cards are drawn at random from a deck of 52 cards "with replacement". What is the probability that exactly one is a King, given that at most one is a King?
Click here to see answer by derangoj(14)

Question 591486: Daniel tosses four fair coins. What is the probability that all four coins will land heads?
Click here to see answer by derangoj(14)

Question 591528: An 8-sided die is rolled. Find P(4 or prime). i need to find the outcomes!!!
Click here to see answer by Edwin McCravy(8909)

Question 591563: The average starting salary of this year's MBA students is $35,000 with a standard deviation of $5,000. Furthermore, it is known that the starting salaries are normally distributed. What are the minimum and the maximum starting salaries of the middle 95% of MBA graduates?
Click here to see answer by nerdybill(6962)

Question 591678: How many 3-digit codes using the digits 0 through 9 are possible if repetitions are allowed?
Click here to see answer by Alan3354(30993)

Question 591681: How many different ways can 6 people stand in line at a cash register?
Click here to see answer by Alan3354(30993)

Question 591794: Based on study we know that 51% of all the surgical patients use herbal medicines prior to surgery. What is the probability for 5 randomly selected patients all use herbal medicine prior to surgery?
A. 0.028
B. 0.034
C. 0.969
D. 0.970
Click here to see answer by jim_thompson5910(28595)

Question 591856: the sides of a number cube are labeled 1 through 6. the probability of randomly rolling a 3 is 1/6. what is the probability of not rolling a 3?

Click here to see answer by jim_thompson5910(28595)

Question 591901: how many 3- letter identification codes are possible if no letter is repeated?
Click here to see answer by Alan3354(30993)

Question 591992: Assume that a population is normally distributed with a mean of 100 and a standard deviation of 15. Would it be unusual for the mean of a sample of 3 to be 115 or more? Why or why not?
Click here to see answer by richard1234(5390)

Question 592077: find the probability of this set of an independent event.. I have a bag of 9 black checkers and 6 red checkers, I draw a red checker, I replace it and draw another red checker.
Click here to see answer by edjones(7569)

Question 592062: A manufacturer's automobile serial number consists of two letters of the alphabet followed by six numerical digits. How many different serial numbers are possible?
Click here to see answer by edjones(7569)

Question 592041: a[][][]b[][]
[][][][][]
[][][][][]
[][][][][]
[][][][][]c
Refer to the given graph. Assume one can move only down or to the right. If a route starts at A and ends at C, what is the probability that the route passes through B? Answer in fraction reduced to lowest terms. Please help, the posted answer of 1/14 is not correct and answer is due. thanks

Click here to see answer by edjones(7569)

Question 592084: a survey of high school seniors of a graduating high school seniors, 10% said that their generation will be remembered for their social concerns, of seven graduating seniors are selected at random. find the probability that either two or three will agree with that statement.
P= .10
Click here to see answer by edjones(7569)

Question 592214: A Bag Contains 5 Red Marbles and 5 blue marbles. Without Replacement what is the probability of having two successive selections of Red Followed by two Successive selections of blue? I think since 5+5=10 the fraction would be 5/10 which =1/2, and than 2+2=4 so 4/2 would be the answer?
Click here to see answer by stanbon(57377)

Question 592262: If X uniformly distributed over (-1, 1), find
a) P{|X| > 1/2};
b) The density function of the random variable |X|.

Click here to see answer by jim_thompson5910(28595)

Question 592278: how would i get a percentage on if i have a total of 80 employees and only 43 took a vaccine? i need a percentage on the ones who didn't.
Click here to see answer by jim_thompson5910(28595)

Question 592304: Find the amount of deposit and the remainder due for each layaway item.
1) cost:$85.00
Deposit: 10%
Amount of deposit:
Remainder due:
2) cost: $48.00
Deposit: 1/3
Amount of deposit:
Remainder due:
3) cost: $24.00
Deposit: 15%
Amount of deposit:
Remainder due:
4) cost: 125.00
Deposit: $10.00
Amount of deposit:
Remainder due:
5) cost: 65.99
Deposit: 20%
Amount of deposit:
Remainder due:
Click here to see answer by solver91311(16897)

Question 592511: After an interview, a job applicant estimates that his chance of getting the job to be 50%. What type of probability is this?
Click here to see answer by stanbon(57377)

Question 592583: I'm completely stuck!
"What is the chance that a randomly selected person spends less than 15 minutes commuting?"
The information provided is:
the average time people spend commuting to work each day is 25 minutes
the variance is 144
I found that the standard deviation is 12, but I can't figure out how to use this information to solve the question.

Help is greatly appreciated!

Click here to see answer by stanbon(57377)

Question 592669: Assume that P(E) = 0.15 and P(F) = 0.48. If E and F are independent, find P(E and F).
Answer

Click here to see answer by stanbon(57377)

Question 381118: According to the Coffee Research Organization (http://www.coffeeresearch.org) the typical American coffee drinker consumes an average of 3.1 cups per day. A sample of 12 senior citizens revealed they consumed the following amounts of coffee, reported in cups, yesterday. At the .05 significance level does this sample data suggest there is a difference between the national average and the sample mean from senior citizens?

3.1
3.3
3.5
2.6
2.6
4.3
4.4
3.8
3.1
4.1
3.1
3.2

(a.) State the null hypothesis and the alternate hypothesis. (Round your answers to 1 decimal place.)
(b.)State the decision rule for .05 significance level. (Negative amount should be indicated by a minus sign. Round your answers to 3 decimal places.)

(c.)Compute the value of the test statistic. (Round your answer to 3 decimal places.)

Click here to see answer by hohostar(1)

Question 592851: Events A and B are complimentary events. Find P (A):
1) P(B) = 0.6
2) P(B) = 0.46
3) P(B) = 0.87
Click here to see answer by jim_thompson5910(28595)

Question 592811: IQ test scores are normally distributed with a mean of 100 and a standard deviation of 15. An individual's IQ score is found to be 128. Find the z-score corresponding to this value.
Click here to see answer by solver91311(16897)

Question 592939: Explain why a type II error occurs.
Click here to see answer by richard1234(5390)

Question 593022: Find the z-score corresponding to a score of X = 100 for each of the following distributions:
a. μ = 80 and σ = 10
b. μ = 80 and σ = 5
c. μ = 105 and σ = 10
d. μ = 105 and σ = 5
Make sure to indicate the direction (sign) of the z-scores.

Click here to see answer by nerdybill(6962)

Question 593116: in a bag there are 4 red marbles, 2 yellow marbles and 7 brown marbles.
1.find the probability of selecting one red marble.
2.find the probability of selecting 1 red, i yellow and one brown marble in succession without replacement.
Click here to see answer by htmentor(789)

Question 593061: A previous analysis of paper boxes showed that the standard deviation of their
lengths is 15 millimeters. A packer wishes to find the 90% confidence interval for the average length of a box. How many boxes does he need to measure to be accurate within 3 millimeters?
A) 25 B) 97 C) 69 D) 41
Click here to see answer by stanbon(57377)

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