Pre-Calculus

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A standard deck of cards is shuffled and cut (random card
A standard deck of cards is shuffled and cut (random card shown and replaced) 7 times. What is the probability that they are not all face cards? On average, how many of the 7 cuts will result in face … read more
rajeevanpillai
Master's Degree
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The length of time a full length movie runs from opening to
The length of time a full length movie runs from opening to credits is normally distributed with a mean of 1.9 hours and standard deviation of 0.3 hours. Calculate the following: a) A random movie is … read more
Sandhya_sharma
Master's Degree
Master's Degree
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If random variable X is normally distributed with mean 80
if random variable X is normally distributed with mean 80 and standard deviation 10, find the probability of the following A( P(X<95)= B( P(X>75)= C (P70< X <100)=… read more
akch2002
Master's Degree
3,547 satisfied customers
A lumber machine cuts are normally distributed, with a mean
A lumber machine cuts are normally distributed, with a mean of 96 inches and a standard deviation of 0.5 inches. you randomly select 40 board. Find the probability their mean length is between 95.85 i… read more
Tom
Master's Degree
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In an experiment, we flip a biased coin 100 times. The
In an experiment, we flip a biased coin 100 times. The probability, that we get a head is p=0.2. Let X be the random variable that counts the number of heads in this experiment. Let Y be a random vari… read more
akch2002
Master's Degree
3,547 satisfied customers
In the city of Longskank, the mean adult weight is 62kg and
In the city of Longskank, the mean adult weight is 62kg and the standard deviation is 10kg. Assuming that the weight of adult males is normally distributed, find the probability that an adult chosen a… read more
Sandhya_sharma
Master's Degree
Master's Degree
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1. A credit card company decides to study the frequency with
1. A credit card company decides to study the frequency with which its cardholders charge for items from a certain chain of retail stores. The data values collected in the study appear to be normally … read more
Ryan
Bachelor's Degree
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Question 1 Assume that the weight loss first month
Question 1 Assume that the weight loss for the first month of a diet program varies between 6 pounds and 12 pounds, and is spread evenly over the range of possibilities, so that there is a uniform dis… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
Assume a member is selected at random from the population represented
Assume a member is selected at random from the population represented by the graph. Find the probability that the member selected at random is from the shaded area of the graph. Assume the variable x … read more
JACUSTOMER-yrynbdjl-
Master's Degree
13 satisfied customers
FOR SCOTT ONLY, Scott think you can have this for me today?
FOR SCOTT ONLY, Scott think you can have this for me today? Seems pretty simple just matching things up...Also are you free tonight to do the math lab stuff for this week same time as usual like 6:15 … read more
Scott
Master's Degree
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1) If n = 100 and p = 0.02 in a binomial experiment, does
1) If n = 100 and p = 0.02 in a binomial experiment, does this satisfy the rule for a normal approximation? Why or why not? 2) Find the z-score for the standard normal distribution where: P(z 47. 2. F… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
1. For a particular sample of 80 scores on a psychology exam,
1. For a particular sample of 80 scores on a psychology exam, the following results were obtained. First quartile = 65 Third quartile = 98 Standard deviation = 8 Range = 56 Mean = 83 Median = 81 Mode … read more
Ray Atkinson
Bachelor's Degree
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For a normal distribution find a value of Z such that 10% of
For a normal distribution find a value of Z such that 10% of the total are under the normal curve is to the right of Z....Z= Determine the value of Z such that 50% of the area under the normal curve i… read more
Stevewh
Bachelor's Degree
Bachelor's Degree
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What is the mean annual snowfall during 49 randomly picked years?
Solve the problem. The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 94 inches, and a standard deviation of 14 inches. What is the probability that the … read more
Chirag
Master's Degree
10,329 satisfied customers
X has a normal distribution with a mean of 80.0 and a standard
X has a normal distribution with a mean of 80.0 and a standard deviation of 3.5. Find the following probabilities: (A) P(x < 75.0) (B) P(75.0 < x 88.0)… read more
Stevewh
Bachelor's Degree
Bachelor's Degree
7,610 satisfied customers
The specifications call for a shaft to be 1.000 inch in diameter.
The specifications call for a shaft to be 1.000 inch in diameter. The acceptable tolerances are +/- 0.005 inches. By doing a process study, you have determined that the average output of diameter is 1… read more
Chirag
Master's Degree
10,329 satisfied customers
Suppose your new Ostrich brand computer comes with a two year
Suppose your new Ostrich brand computer comes with a two year warranty. You do some research and find that the lifespan of these computers is distributed normally with a mean life of 32 months and a s… read more
Osbert12
Master's Degree
2,468 satisfied customers
The amount of time spent by North American adults watching television
The amount of time spent by North American adults watching television per day is normally distributed with a mean of 6 hours and a standard deviation of 1.5 hours. a) What is the probability that a ra… read more
R.R. Jha
Bachelor's Degree
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