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Probability-and-statistics Questions
Probability-and-statistics Questions
Suppose a small finite population consists of only 8 numbers: 54, 55, 59, 63, 64, 68, 69, 70
According to Chebyshev's theorem, the proportion of values from a data set that is further than 2 standard deviations from the mean is at most-----
There are 5 nickels, 3 dimes, and 2 quarters
A certain type of thermal battery for an airplane navigation device backup power has a mean life of 300 hours with a standard deviation of 15 hours
Two cards are drawn without replacement from an ordinary deck of 52 playing cards
The Tampa Bay (Florida) Area Chamber of Commerce wanted to know whether the mean weekly salary of nurses was larger than that of school teachers
If each lottery has only one winning ticket, and you buy two tickets to the "Same" lottery, what is the probability that you will have a winning ticket
Estimate the probability of the event: the data set represents the income levels of the members of a country club
) In how many ways can 6 instructors be assigned to six sections of a course in mathematics
Given the following sample information, test the hypothesis that the treatment means are equal at the
A five question multiple-choice quize as five choices for each answer
In a study of how managers attempt to manage earnings, researchers analyzed a sample of 515 earnings-management attempts from a survey of experienced auditors
a commitee is formed by randomly selecting from eight nurses and two doctors
From experience, a battery manufacturer knows the probability of a battery being defective is
Dave the jogger runs the same route every day (about 2.2 miles)
On a standard measure of hearing ability, the mean is 300 and the standard deviation is 20
If a tire has a mean mileage of 60,000 miles and a standard deviation of 2,000, and the company doesn't want to have a replacement expense of more than 4%, what is the minimum guaranteed mileage for the tire
The postanesthesia care area (recovery room) at St
Need help: A die is rolled twice
you are dealt 2 cards successively (without replacement) from a shuffled deck of 52 playing cards
Each person that works at a company is given a 5-digit code followed by a letter, either uppercase or lowercase
On National Public Radio, the Weekend edition program on Sunday, September 7, 1991, the following probability problem was posed: Given a certain number of balls, of which some are blue, pick 5 at random
Farm-raised trout contain an average of grams of fat per pound, with a standard deviation of grams of fat per pound
In the Big Ten (NCAA sports league) a sample showed that only 267 out of 584 freshman football players graduated within 6 years
A box of cookies contains a mean mass of 180g with and standard deviation of 2g
(Info needed to solve the question, There are two little lotteries in town, each of which sells exactly 100 tickets
Hi Please help me with this problem
In a certain distribution, the mean is 50 with a standard deviation of 6
What is the probability of getting a sum of 3 when three standard dice are rolled
Kindly, help me solve this question
What is the formula that I would use to solve this problem
A corporate executive officer is attempting to arrange a meeting of his three presidents for tomorrow morning
Can someone please help me with this problem: In a game of musical chairs, 11 children will sit in 10 chairs arranged in a row(one child will not find a chair)
The number of older consumers in the United States is growing and they are becoming an even bigger economic force
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of two emails per hour
Lets U = {q,r,s,t,u,w,x,y,z}; A={q,s,u,w,y}; B={q,s,y,z} and C ={v,w,x,y,z} List the members of the indicated set, using set braces
Six people are selected at random
kathy has 10 red socks, 12 green socks, and 26 purple socks in her drawer
A recent issue of Bride Magazine suggested that couple planning their wedding should expect two-thirds of those who are sent an invitation to respond that they will attend
Need help: Use a Venn diagram to answer the question
Two standard dice are rolled
A normal distribution has a mean of 80 and a standard deviation of 14
Four standard decks of 52 cards are combined
the population deviation is resistant true or false
The odds against Thunderbolt winning the Birmingham Derby are 11:3
Grace has 16 jellybeans in her pocket
what is the probability of tossing a coin 3 times and getting heads each time
The total amount being spent on personal calls in a month by employees of a company follows a normal distribution with a mean of $900 and a standard deviation of
Need help: Suppose P(C) =
Need help: Solve the problem
Drawing a heart and a diamond in that order in 2 consecutive draws when the first card is returned to the deck and the deck is shuffled after the fist draw
Three-fourths of the numbers in any data set will be larger than the A) first quartile B) third quartile C) median D) midrange E) fourth quartile
Over the last several years, the use of cell phones has increased dramatically
I have two questions if its ok: 1
If there are 3 means to be compared, then how many possible different comparisons are there altogether
Hi, I am really struglling with this question
In a normal distribution with a mean and a std deviation, how do you find the probability of selecting 3 random units, whose total average exceeds a certain value
I cannot figure the correct term terms to use
Please help w/ the following: A box of chocolates contains 20 identically shaped chocolates
Solve for X 2x + 7 > 15 how do I do this
A quality control expert is called in to determine whether a newly installed machine is producing a particular cotton cloth according to the specifications set by the manufacturer
Sometimes stores offen incredibly good prices on a product to encourage people to shop at the store
A roulette wheel in the U
Need help: Evaluate the expression
An independent television station airs a movie-of-the-day every Tuesday and Thursday
Reposting again with proper data - Thanks
Radio stations in the United States have call letters that begin with either K or W
At an annual flower show, 7 different entries are to be arranged in a row
a card is selected from a deck of 52 playing cards
there are 20 seniors serving the student council of a certain high school
Here is my problem that I am working through on probabilities of random variables
You can win concert tickets from a radio station if you are the first person to call when the song of the day is played, or if you are the first person to correctly answer the trivia question
In each case, consider what you know about the distribution and then explain why you would expect it to be or not to be normally distributed
Card Figure: 1 A , 2 B's, & 3 C's
Joe is a wanna-be professional dart player
a die will be rolled some number of times and you will win $1 if it shows an ace (1 dot) more then 20% of the time, which is better 60 or 600 rolls
The odds against Lightning winning the third race are 9:4
If the model assumptions concerning interval-ratio level of measurement and normal sampling distribution can be satisfied, the preferred test of hypothesis for the difference between samples is a
a biased coin has 1 in 10 chance of landing heads
I am so stuck on these 4 questions
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