10/16/24

A certain lottery has 36 numbers. In how many different ways can 4 of the numbers be​ selected? (Assume that order of selection is not​ important.)
A certain lottery has 36numbers. In how many different ways can 44 of the numbers be​ selected? (Assume that order of selection is not​ important.)
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04/10/24

what is the company's expectation?

The probability that an 80-year-old male in the U.S. will die within one year is approximately 0.069941. If an insurance company sells a one-year, $12,000 life insurance policy to such a person... more
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10/04/23

Probability of a spinner and a coin
A spinner has 20 sections 14 yellow and 6 are blue, the spinner is spun, at the same time a coin is tossed, what is the probability the spinner lands on blue and the coin is tail?
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10/04/23

If you randomly purchase 18 items, what is the probability that their mean life will be longer than 12 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 10.7 years, and standard deviation of 2.9 years.If you randomly purchase 18 items, what is the probability... more
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08/11/23

A population of values has a normal distribution with μ = 17.1 and σ = 12.5 . You intend to draw a random sample of size n = 97 . Find P8, which is the mean separating the bottom 8% mean
A population of values has a normal distribution with μ=17.1 and σ=12.5. You intend to draw a random sample of size n=97.Find P8, which is the mean separating the bottom 8% means from the top 92%... more
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07/05/23

Answer with problem

 Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15(as on the wechsler test). Find the probability that a randomly selected adult has... more
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03/04/23

Assume that adults have IQ scores that are normally distributed with a mean of 101.9 and a standard deviation 21.5
Assume that adults have IQ scores that are normally distributed with a mean of 101.9 and a standard deviation 21.5Find the first quartile Upper Q 1Q1​, which is the IQ score separating the... more
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10/11/22

Half of the smaller of two consecutive even integers is equal to two more than the larger integer
Let x=1st consecutive even integerlet x+2=2nd consecutive even integer
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08/01/22

Probabilities of compound events
You're playing a game where you defend your village from an orc invasion. There are 3 characters (elf, hobbit, or human) and 5 defense tools (magic, sword, shield, slingshot, or umbrella) to pick... more
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05/10/22

NEED HELP PLEASEEEEE
The dimensions of a figure are multiplied by 3, how many times larger will the volume be? 
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05/09/22

The mean clotting time of blood is 7.45 seconds with a standard deviation of 3.6 seconds. What is the probability that an individual’s clotting time will be less than 2 seconds or greater than 11?
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05/09/22

Calculate the margin of error for this survey. Round the percentage to one decimal place. Do not round intermediate steps
fear of the dark is quite common among children. However, what about adults? One polling agency released the results of a survey that asked people over 40 years old if they keep the lights on at... more
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05/09/22

A kennel has 3 black puppies and 4 brown puppies. If someone is randomly choosing puppies, what is the probability they choose two brown puppies?
The answers are:A. 0.5B. 0.1429C. 0.2449D. 0.2857
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05/04/22

What is the radical form of 1.732? Also -1.732 if that's a different answer?
Also, could I have a brief explanation of how to do it? Sorry if the question doesn't make sense. My math teacher asked that for homework and I have no clue what he means.
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05/04/22

A bag has 9 red marbles, 6 blue marbles, and 5 yellow marbles. What is the probability of pulling a blue marble from the bag?

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05/04/22

A political candidate has asked you to conduct a poll to determine what percentage of people support her.
If the candidate only wants a 4% margin of error at a 99% confidence level, what size of sample is needed?Give your answer in whole people.
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05/04/22

The question is in the description.
There are cards in a box. Fifteen of these cards are red, the others are blue, and the rests are white cards. If the probability of drawing a blue card is 0.125 and the probability of drawing a... more
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05/04/22

SAT scores are distributed with a mean of 1,500 and a standard deviation of 300.
You are interested in estimating the average SAT score of first year students at your college. If you would like to limit the margin of error of your 95% confidence interval to 25 points, how many... more
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05/04/22

You must estimate the mean temperature (in degrees Fahrenheit) with the following sample temperatures:
13.7 24.2 22.5 5.7 6 15.3 21.8 Find the 99% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to two decimal places (because the sample data are reported... more
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12/21/14

statistics
A wildlife study is designed to find the mean weight of salmon caught by an Alaskan fishing company. As a preliminary study, a random sample of 50 freshly caught salmon is weighed. The sample... more
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04/09/14

In a poll of 20 students trying to register for classes, the time it took to complete the process had a standard deviation of 8 minutes. Construct a 95% confide
In a poll of 20 students trying to register for classes, the time it took to complete the process had a standard deviation of 8 minutes. Construct a 95% confidence interval for the population... more
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