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Statistics Math

03/15/23

Express the confidence interval 76.6 % ± 7.2 % in the form of a trilinear inequality. % < p < %

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Statistics Math

03/15/23

Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval for a sample of size 146 with 24% successes.

Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. C.I. =

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Statistics Math

03/15/23

In a recent poll, 320 people were asked if they liked dogs, and 62% said they did. Find the Margin of Error for this poll, at the 99% confidence level.

Give your answer to four decimal places if possible.

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Statistics Math

03/15/23

Out of 500 people sampled, 200 preferred Candidate A. Based on this, estimate what proportion of the entire voting population (p) prefers Candidate A.

Use a 99% confidence level, and give your answers as decimals, to three places. < p <

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Statistics

03/14/23

Statistics help

Job Elimination: In the past year,13% of businesses have eliminated jobs. If 4 businesses are selected at random, find the probability that at least 2 have eliminated jobs during the last year.... more

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Statistics

03/14/23

You want to obtain a sample to estimate a population mean.

You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately σ=61.8. You would like to be 90% confident that... more

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Statistics

03/13/23

The amount of time to complete a physical activity in a PE class is normally distributed with a mean of 35 seconds and a standard deviation of 3 seconds.

a) What is the probability that a randomly chosen student completes the activity in less than 27 seconds?b)What is the probability that a randomly chosen student completes the activity in more than... more

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Statistics

03/13/23

A baseball player has a batting average of 0.43 a) what is the probability that he has exactly 3 hits in the next 8 bats? b) What is his batting expected value?

I worked out part a and got that P(X=3)= 0.2678968901I do not understand how to find the expected value for his batting.

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Statistics

03/13/23

statistics normal distribution

in a certain school distract in a large metropolitan area, the SAT scores over the past five years are normally distributed with a mean of 1454. furthermore, Q3 is 1662. what is P98 score for the... more

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Statistics

03/12/23

Statistics and Probability

Find the indicated area under the standard normal curve. Between z=0 and z=0.12

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Statistics Probability

03/12/23

Reproduce the figure for each of the following events, then shade the region that corresponds the event.

(a) A(b) (A n B) u (A n B’)(c) (A n B) U C(d) B-A

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Statistics Probability

03/12/23

Assume our "universal set" is the set of all letters in the alphabet, and consider the following sets:

M = {x | x is a letter in "mathematics"} P= {xx is a letter in "probability"},S = {x | x is a letter in "statistics"). Write each of the following (in roster notation. Keep in mind that when... more

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Statistics Probability

03/12/23

Suppose someone wants to know about college student performance on the final exam for MA235. They are given the exam scores for students in my MA235 classes from last quarter.

(a) In this situation, what are each of the following?1.) population 2.) units3.) sample4.) characteristics (b) Would the average exam score of the students from my classes last quarter be... more

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Statistics Probability

03/12/23

Suppose an artists has 9 works of art ready to display, but may only display 4 at a time on a gallery wall.

(a) How many different ways can they arrange 4 paintings side-by-side on the wall? (b) How many different groups of 4 paintings could they choose to display?

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Statistics Probability

03/12/23

Suppose you have 5 textbooks - 2 math (Calculus and Prob & Stats), and 3 engineering (EE, ME, and CE).

(a) In how many ways can the books be arranged on a shelf? (b) In how many ways can the books be arranged on a shelf if the math books should be to the left of the engineering books? (c) If you... more

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Statistics

03/12/23

A byte is a sequence of eight bits, where each bit is either 0 or 1. How many different bytes are there?

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Statistics

03/12/23

not understanding how you do this could you explain please!

The following table presents the time taken to review articles that were submitted for publication to the journal Technometrics during a recent year. A few articles took longer than 9 months to... more

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Statistics

03/11/23

Approximately 10% of all people are left-handed ("11 little-known facts,"2013). Consider a grouping of fifteen people.

a.State the random variable.b.) Argue that this is a binomial experiment. Find the probability thatc.) None are left-handed.d.) Seven are left-handed.e.) At least two are left-handed.f.) At most... more

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Statistics

03/10/23

What is the probability of this question?

The weight of a certain brand of candies are normally distributed with a mean weight of 0.8 538G and a standard deviation of 0.0 519G. A sample of these candies came from a package containing 453... more

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Statistics

03/09/23

steps on how to figure this problem

A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 10% margin of error at a 99% confidence level, what size of... more

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Statistics

03/09/23

statistics problem

According to a recent survey, 4 % of the population owns a cat. 67 Percent of cat owners are married, while 56 % of non-cat owners are married. If you randomly select a person, what is the... more

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Statistics

03/09/23

Normal Approximation to Binomial

n= 80p= .15x=18

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Statistics Probability

03/09/23

What effect does the circled point have on the slope and y-intercept of the least-squares regression line?

A guidance counselor wants to determine if there is a relationship between a student’s number of absences, x, and their grade point average (GPA), y. The data that were collected are displayed in... more

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Statistics

03/09/23

Alternative hypothesis, two sample t statistic, degree of freedom

Equip male and female students with a small device that secretly records sound for a random 30 seconds during each 12.5-minute period over two days. Count the words each subject speaks during each... more

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Statistics

03/09/23

What is the Critical Value and 95% confidence interval

Ten randomly selected people took an IQ test A, and next day they took a very similar IQ test B. Their scores are shown in the table below. Person A B C D E F G H I J Test... more

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Express the confidence interval 76.6 % ± 7.2 % in the form of a trilinear inequality. % < p < %

Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval for a sample of size 146 with 24% successes.

In a recent poll, 320 people were asked if they liked dogs, and 62% said they did. Find the Margin of Error for this poll, at the 99% confidence level.

Out of 500 people sampled, 200 preferred Candidate A. Based on this, estimate what proportion of the entire voting population (p) prefers Candidate A.

Statistics help

You want to obtain a sample to estimate a population mean.

The amount of time to complete a physical activity in a PE class is normally distributed with a mean of 35 seconds and a standard deviation of 3 seconds.

A baseball player has a batting average of 0.43 a) what is the probability that he has exactly 3 hits in the next 8 bats? b) What is his batting expected value?

statistics normal distribution

Statistics and Probability

Reproduce the figure for each of the following events, then shade the region that corresponds the event.

Assume our "universal set" is the set of all letters in the alphabet, and consider the following sets:

Suppose someone wants to know about college student performance on the final exam for MA235. They are given the exam scores for students in my MA235 classes from last quarter.

Suppose an artists has 9 works of art ready to display, but may only display 4 at a time on a gallery wall.

Suppose you have 5 textbooks - 2 math (Calculus and Prob & Stats), and 3 engineering (EE, ME, and CE).

A byte is a sequence of eight bits, where each bit is either 0 or 1. How many different bytes are there?

not understanding how you do this could you explain please!

Approximately 10% of all people are left-handed ("11 little-known facts,"2013). Consider a grouping of fifteen people.

What is the probability of this question?

steps on how to figure this problem

statistics problem

Normal Approximation to Binomial

What effect does the circled point have on the slope and y-intercept of the least-squares regression line?

Alternative hypothesis, two sample t statistic, degree of freedom

What is the Critical Value and 95% confidence interval

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