8,918 Answered Questions for the topic statistics

Statistics

09/17/22

note that an ace is considered a face card for this problem, what is the percentage of drawing 1 queen and 1 3 from a regular deck of cards?
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Statistics

09/17/22

Stat question number 12
A cone-shaped pile of sawdust has a base diameter of 38 feet, and is 15 feet tall. Find the volume of the pile. ft.3Round your answer to the nearest tenth if necessary.
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Statistics

09/17/22

help me with my statistics homework
67.7 101.8 7.3 -181.9 19.7 159.8 43.5 -730 45.7 426 53.9 -18.7 58 216.6 40.9 -74.2 46.8 204.5 43.5 216 35.6 302.5 37.1 -51.2 59.4 -453 18.6 238 248.9 -89.4 What is... more
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Statistics

09/16/22

Statistics Homework
he Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 40 ounces and a standard deviation of 8 ounces.Use the Standard Deviation... more
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Statistics

09/16/22

Hello I need help with errors type please help
1) Given a sample X1, ... , Xn from X ~ N (𝜇, 𝜎2), we want to test H0 : 𝜇 = 1 against H1 : 𝜇 ≠ 1. If X̅ = 1.2, n = 9, and S = 0.2 T = ?, df = ?2) For question 1, what type of errors do we make? (𝛼... more
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Statistics

09/16/22

Question is in description

Suppose the grade point averages of undergraduate students at one university have a bell-shaped distribution with a mean of 2.52 and a standard deviation of 0.38. Using the empirical rule, what... more
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Statistics

09/16/22

I need help with is question?
Calculate the range, population variance, and population standard deviation for the following data set. If necessary, round to one more decimal place than the largest number of decimal places given... more
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Statistics

09/15/22

Application of standard deviation

The physical plant at the main campus of a large state university recieves daily requests to replace fluorescent lightbulbs. The distribution of the number of daily requests is bell-shaped and has... more
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Statistics

09/15/22

Hello, I need help solving the question below. Please help
Given a sample X1, … , X9 ~ 𝑁 (𝜇, 32), if 𝜇 = 1 , 𝑃 ( − 2 < 𝑋̅ < 4 ) = ?
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Statistics

09/15/22

Statistics questions
1A discrete random variable X models how many sales per day a salesman makes. From past experience we know PX(X ≤ 3) = 0.3 and PX(X ≥ 3) = 0.9. Which of the following must be true?PX(X < 4) <... more
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Statistics

09/15/22

business statistic
a)       Three randomly selected households are surveyed as a pilot project for a larger survey to be conducted later. The numbers of people in the households are 5, 7, and 9. Consider... more
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Statistics

09/15/22

Stat Question Number 13
Multiple-choice questions each have 4 possible answers, one of which is correct. Assume that you guess the answers to 4 such questions.Use the multiplication rule to find the probability that the... more
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Statistics

09/15/22

Question about Standard Deviation
x P(x) 0 0.05 1 0.3 2 0.3 3 0.35 Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places  
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Statistics

09/14/22

business statistics
On a busy day, the average roller coaster wait time at a large amusement park is 27 minutes. Suppose the standard deviation of the wait time is 11.9 minutes and the distribution of wait... more
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Statistics

09/14/22

Hi I need help with the type error
1.62) Cooling method for gas turbines. During periods of high electricity demand, especially during the hot summer months, the power output from a gas turbine engine can drop dramatically. One way... more
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Statistics

09/14/22

Hello, I need help with the word problem
1.71) Laughter among deaf signers. The Journal of Deaf Studies and Deaf Education (Fall 2006) published an article on vocalized laughter among deaf users of American sign language (ASL). In... more
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Statistics

09/14/22

Statistics discrete probably

Tickets for a raffle cost $10. There were 657 tickets sold, One ticket will be randomly selected as thewinner, and that person wins $1200 and also the person is given back the cost of the ticket.... more
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Statistics Probability

09/12/22

probability and stats
Giving a test to a group of students, the grades and genders are summarized below. A B C Total Male 17 20 12 49 Female 2 3 15 20 Total 19 23 27 69 If one student is chosen at random,find... more
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Statistics

09/12/22

statistics questions studying for mid sems
1 Let X be normally distributed with mean 10. A statistician is trying to work out P(X > 16). They correctly work out that this probability is 0.04 (rounded to 2dp). Which of the following is... more
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Statistics

09/12/22

Let X ∼ N(0, 2) and Y ∼ N(0, 1), and let Cov(X, Y ) = −1. What is the distribution of 2X − 3Y ?
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Statistics

09/11/22

Stat question about CDs
With one method of a procedure called acceptance sampling, a sample of items is randomly selected without replacement and the entire batch is accepted if every item in the sample is okay. The ABCD... more
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Statistics

09/11/22

Statistics homework

Common stock distributed between $20 & $40 what is probability stock price will be more than $33
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Statistics

09/10/22

Stat question for MAth
Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 75 people in the 18-21 age bracket and finds that 64 of them respond and 11... more
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Statistics

09/10/22

Math question about stat
Suppose a jar contains 8 red marbles and 12 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.
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09/10/22

Applied Probability & Information Theory - Joint Entropies
A child’s toy contains two windows in each of which a clown’s face appears when a button is pressed. The clown may be either smiling or crying. The design is such that the probability of each... more
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