8,955 Answered Questions for the topic statistics

Statistics Probability

03/29/22

Probability Statistics
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 45 ounces and a standard deviation of 5 ounces.Use the Empirical... more
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Statistics Probability

03/29/22

Help with statistics question
The probability density of a random variable X is given in the figure below.From this density, the probability that X > 1.72 or X < 0.14 is: 
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Statistics

03/29/22

E and F are mutually exclusive events. P(E) = 0.5; P(F) = 0.4. Find P(E|F). (Enter your answer to one decimal place.) P(E|F)

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03/29/22

For a standard normal distribution, find: P(z < 2.85) Express the probability as a decimal rounded to 4 decimal places.
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Statistics Probability

03/29/22

A plane lands or takes off, on average once per 45 seconds at an airfield. Calculate what is the probability that in a random selected hour we notice:
1) At least 75 landings or take offs?2) Under 100 landings or take offs?
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Statistics

03/29/22

If one student is chosen at random, Find the probability that the student was full-time AND got a "B".
Giving a test to a group of students, the grades and class-taking status are summarized below A B C Total Full-time 2 18 3 23 Part-time 13 16 14 43 Total 15 34 17 66
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Statistics

03/29/22

The time it takes me to wash the dishes on a randomly selected night is uniformly distributed between 6 minutes and 19 minutes.
The time it takes me to wash the dishes on a randomly selected night is uniformly distributed between 6 minutes and 19 minutes.a) State the random variable in the context of this problem.   rv X =... more
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Statistics

03/28/22

Probability question
If a group of 54 students are randomly broken into 3 groups of 18 students each every school year. What are the odds that any two students will be in the same group for three years in a row? Thanks
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03/28/22

Yummy Creamy is a New York based company that manufactures and distributes ice-cream across tri-state area. The product line includes 2 main flavors – Purple Delight (PD) and Choco- Chips (CC).
Yummy Creamy Is a New York based company that manufactures and distributes Ice-cream across tri-state area. The product line includes 2 main flavors - Purple Delight (PD) and Choco- Chips (CC). On... more
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Statistics

03/28/22

standard deviation
how to find standard deviation
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Statistics Math

03/27/22

Business Statistics.

Consider the hypothesis test below.H0 : p1 -p2 < or = 0Ha : p1-p2 > 0The following results are for independent samples taken from the two populations.sample 1 sample 2n1 = 200 n2 = 300‾p1=... more
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Statistics

03/26/22

b. Find the critical value t a/2 corresponding to a 95% confidence level
TInterval(13.046,22.15)x=17.598Sx=16.01712719n=50
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Statistics

03/26/22

Stats q pls help
Weights of erasers produced by a certain factory are known to follow the uniform distribution between 31.5 g and 32.3 g. (a) (10 points) Erasers produced by this factory are sold in packs of 45. A... more
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Statistics Math Algebra 1 Algebra 2

03/26/22

PLEASE help with statistical probability questions!
In a class of 26 students, 14 have a cat and 7 have a dog. There are 5 students who have a cat and a dog. What is the probability that a student chosen randomly from the class does not have a dog?
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03/25/22

Having a lot of trouble with this. Can someone help?
A fine dining restaurant claims that the group sizes of their customers follows the following distribution: 2 people3 people4 people4+ people 32% 13% 18% 37% Gustavo, a waiter at the restaurant,... more
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Statistics

03/25/22

Normal Distribution and Percentages
The graph illustrates a normal distribution for the prices paid for a particular model of HD television. The mean price paid is $1800 and the standard deviation is $85.What is the approximate... more
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Statistics Math Algebra 1 Algebra 2

03/25/22

PLEASE help with statistical probability questions!
In a math class with 19 students, a test was given the same day that an assignment was due. There were 11 students who passed the test and 14 students who completed the assignment. There were 3... more
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Statistics Math Algebra 1 Algebra 2

03/25/22

PLEASE help with statistical probability questions!
In a math class with 19 students, a test was given the same day that an assignment was due. There were 11 students who passed the test and 14 students who completed the assignment. There were 3... more
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Statistics Math Algebra 1 Algebra 2

03/25/22

please help me with statistical probability question!
Age 20-29 Age 30-39 Age 40-49 Age 50 & over Total High school only 946 1118 369 1010 3443 Some college 1088 1277 566 2106 5037 Bachelor's degree 646 1045 472 2083 4246 Master's... more
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Statistics Math Algebra 1 Algebra 2

03/25/22

Please help with statistical probability questions
In a certain Algebra 2 class of 30 students, 16 of them play basketball and 8 of them play baseball. There are 12 students who play neither sport. What is the probability that a student chosen... more
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Statistics Math Algebra 1 Algebra 2

03/24/22

help with statistical probability
In a class of 25 students, 17 have a cat and 7 have a dog. There are 5 students who have a cat and a dog. What is the probability that a student who has a cat also has a dog?
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Statistics Math Algebra 1 Algebra 2

03/24/22

help with statistical probability

Age 20-29 Age 30-39 Age 40-49 Age 50 & over Total High school only 1413 661 799 602 3475 Some college 2237 562 1193 1185 5177 Bachelor's degree 1062 1391 1187 1732 5372 Master's... more
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Statistics Math Algebra 1 Algebra 2

03/24/22

help with probability and statistics
There is a spinner with 10 equal areas, numbered 1 through 10. If the spinner is spun one time, what is the probability that the result is a multiple of 2 and a multiple of 5?
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Statistics Math Algebra 1 Algebra 2

03/24/22

please help with these maht statistical probabilty questions
Plays an instrument Does not play an instrument Plays a sport 5 2 Does not play a sport 4 12 In a class of students, the following data table summarizes how many students play an instrument... more
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Statistics Math Algebra 1 Algebra 2

03/24/22

please help with this math probability statistical question
Has a brother Does not have a brother Has a sister 2 3 Does not have a sister 10 7 In a class of students, the following data table summarizes how many students have a brother or a sister.... more
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