8,918 Answered Questions for the topic statistics

Statistics

01/31/24

How can i do the following problem in r studio?
Problem I. It was reported on the local news that Gen Zers consider it rude if someone takes over 20 minutes to reply to a text message. To test this statement, you randomly select 30 Gen Zers to... more
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Statistics

01/31/24

Statistics multiple choice

Which of the following statements) about errors and residuals is (are) correct? Check all that apply.Both errors and residuals are random variables.Errors are observed, while residuals are not... more
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Statistics

01/31/24

Measures of Center

Calculate the GPA of a student with the following grades: A (13 hours), C (21 hours), D (17 hours). Note that an A is equivalent to a 4.0, a B is equivalent to a 3.0, a C is equivalent to a 2.0, a... more
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Statistics

01/31/24

What is a Confidence Interval
How do you construct a confidence interval? What numbers do you use ? How do you set it up?
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Statistics

01/27/24

Statistics and Probability

According to a college survey, 22percent of all students work full time. Find the mean for the random variable X, the number of students who work full time in samples of size 16.
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Statistics

01/24/24

Answer the following.

Assuming that the heights of female college students are normally distributed with mean 64 inches and standard deviation 2.3 inches, answer the following questions. (Hint: Use the figure below with... more
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Statistics

01/24/24

Answer the following questions.

In introductory statistics courses at Large State University, the times it takes students to complete their final exams are normally distributed with a mean of 𝜇 = 92 minutes and a standard... more
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Statistics

01/24/24

Consider the following probability.

Consider the following probability.P(−1.24 ≤ z ≤ 2.73)Let z be a random variable with a standard normal distribution. Find the indicated probability. (Round your answer to four decimal... more
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Statistics

01/24/24

Answer the following questions.

A person's blood glucose level and diabetes are closely related. Let x be a random variable measured in milligrams of glucose per deciliter (1/10 of a liter) of blood. Suppose that after... more
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Statistics

01/24/24

Answer the following.

Suppose the heights of 18-year-old men are approximately normally distributed, with mean 67 inches and standard deviation 6 inches.(a)What is the probability that an 18-year-old man selected at... more
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Statistics

01/24/24

Please answer the following questions.

The second dose of the COVID-19 vaccine is more likely to produce side effects than the first. The time between receiving the shot and the onset of side effects is called the lag time. Suppose... more
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Statistics

01/24/24

Please answer the following question.

Suppose x has a distribution with a mean of 60 and a standard deviation of 21. Random samples of size n = 36 are drawn. Find the z value corresponding to x = 53.z=Find P(x < 53). (Round your... more
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Statistics

01/24/24

Please solve and answer what z=
Find z such that 5.5% of the standard normal curve lies to the left of z. (Round your answer to two decimal places.)
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Statistics

01/24/24

Please solve the following.
Assume that x has a normal distribution with the specified mean and standard deviation. Find the indicated probability. (Round your answer to four decimal places.) 𝜇 = 8; 𝜎 = 2 P(7 ≤ x ≤ 11) =
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Statistics

01/23/24

Suppose that 61% of people own dogs. If you pick two people at random, what is the probability that they both own a dog? Give your answer as a decimal (to at least 3 places) or fraction
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Statistics

01/22/24

Question Regarding Z-Score Concept
I'm grappling with the concept of z-scores and their relationship to standard deviations. I used a z-score calculator (https://zscorecalculator.org) for a dataset, and my result was a z-score of... more
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Statistics

01/21/24

What are the probabilities?
Round all answers to 4 decimal places.a. A bag contains   marbles,   marbles, and   marbles. If a marble is drawn from the bag, replaced, and another marble is drawn, what is the probability of... more
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Statistics

01/21/24

Find the probability of a positive result for five samples combined into one mixture, assuming the probability of an individual blood sample testing positive for the virus is 0.07.
When doing blood testing for a viral infection, the procedure can be made more efficient and less expensive by combining partial samples of different blood specimens. If samples from five people... more
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Statistics

01/21/24

If 6 of these CDs are randomly selected for testing, what is the probability that the entire batch will be accepted?
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 ABC... more
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Statistics

01/21/24

What are the probabilities of these M&M
According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12% are red, 23% are blue, 23% are orange and 15% are green. (Round your... more
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Statistics

01/21/24

One customer is chosen at random for a prize giveaway. (Round answers to 4 decimal places.)
A store manager gathers some demographic information from the store's customers. The following chart summarizes the age-related information they collected: AgeNumber of... more
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Statistics

01/21/24

what is the probability that the athlete is either a football player or a basketball player?
A survey of athletes at a high school is conducted, and the following facts are discovered: 23% of the athletes are football players, 42% are basketball players, and 11% of the athletes play both... more
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Statistics

01/21/24

If one of the pedestrian deaths is randomly selected, find the probability that the pedestrian was intoxicated or the driver was not intoxicated. Please enter a decimal to 4 decimal places.
The table summarizes results from 989 pedestrian deaths that were caused by automobile accidents. Pedestrian DeathsDriver  Intoxicated?Pedestrian... more
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Statistics

01/21/24

If one of the pedestrian deaths is randomly selected, find the probability that both the pedestrian and the driver were intoxicated. Please enter a decimal to 4 places.
The table summarizes results from 975 pedestrian deaths that were caused by automobile accidents. Pedestrian DeathsDriver  Intoxicated?Pedestrian... more
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Statistics

01/21/24

Continuous Distributions and the Uniform Distribution
Births are approximately Uniformly distributed between the 52 weeks of the year. They can be said to follow a Uniform distribution from 1 to 53 (a spread of 52 weeks). Round answers to 4 decimal... more
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