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Statistics

12/04/21

What is the formula for calculating this?

X follows a beta distribution with parameters alpha=5 and beta=2. What is V(X)?

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Statistics

12/04/21

confidence interval

Express the confidence interval 213.6<μ<313 in the form of ¯x±ME.

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Statistics

12/04/21

ITS LIKE ALIEN LANGUAGE HELP PLEASE

The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 50.5 for a sample of size 735 and standard... more

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Statistics

12/03/21

The results on a final exam given by a university professor are normally distributed with a mean of 65.3% and a standard deviation of 8.5.

The results on a final exam given by a university professor are normally distributed with a mean of 65.3% and a standard deviation of 8.5. A student with a mark of 70% on the exam justified it to... more

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Statistics

12/03/21

It is estimated that 10% of the vehicles entering Canada from the United States carry undeclared goods.

It is estimated that 10% of the vehicles entering Canada from the United States carry undeclared goods. Assuming the data can be modelled using a normal approximation, determine the probability... more

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Statistics Math

12/03/21

Given 𝑿 is a normally distributed random variable with a mean of 155 and a standard deviation of 11.6, determine

Given 𝑿 is a normally distributed random variable with a mean of 155 and a standard deviation of 11.6, determine A) 𝑷(𝑿>170) B) 𝑷(𝟏𝟓𝟐<𝑋<170)

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Statistics

12/03/21

Sketch a graph of a distribution that is positively skewed and state a real life example of when a positively skewed distribution would exist.

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Statistics

12/03/21

When correlation is not established, what is the best predicted value of the response variable?

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Statistics

12/03/21

Determine whether each of the following binomial distributions can be approximated using a normal distribution.

Determine whether each of the following binomial distributions can be approximated using a normal distribution.A) 𝑛=50 B) 𝑛=40 𝑝 = 0.4 ... more

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Statistics

12/03/21

Determine the mean of a set of a normally distributed data with a standard deviation

Determine the mean of a set of a normally distributed data with a standard deviation of 4 and a 𝒛-score of 1.5 when 𝑥 = 73.

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Statistics

12/03/21

Rewrite the following probabilities with a continuity correction.

Rewrite the following probabilities with a continuity correction.A) 𝑷(𝑿>170) B) 𝑷(−𝟐≤𝑿<7)

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Statistics

12/03/21

Statistics, standard deviation, mean, and z score

the local police force gives all applicants an entrance exam and accepts only those applicants who score is the top 1.5% on teh test. Assuming the scores are normally distributed, the mean score is... more

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Statistics

12/02/21

Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 14 years and a standard deviation of 2 years.

If the company wants to provide a warranty so that only 1.3% of the quartz time pieces will be replaced before the warranty expires, what is the time length of the warranty?warranty = ____yearsWhat... more

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Statistics

12/02/21

A distribution of values is normal with a mean of 42.3 and a standard deviation of 49.1. Find P42, which is the score separating the bottom 42% from the top 58%.

This has me 100% lost. I am not sure where to even start.

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Statistics

12/02/21

A particular fruit's weights are normally distributed, with a mean of 493 grams and a standard deviation of 17 grams. The heaviest 19% of fruits weigh more than how many grams?

I am confused as to what the percentage represents and how that helps me.

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Statistics Probability

12/02/21

what is the probability that the sum of the dices is 4 ?

in an experiment, a ball is drawn from a box containing 7 green balls and 10 orange balls. if the ball is green, two dice are rolled. if the ball is orange, three dices are rolledwhat is the... more

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Statistics

12/02/21

Probability and States

1. Suppose you have 2 duffel bags, each containing $1000 casino chips, some from Caesar's Palace and some from Harrah's (and nothing from anywhere else). In both bags 40% are real and the rest... more

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Statistics

12/02/21

Probability and Stats

1. With replacement and a normal deck, no jokers, show how to calculate the probability of the following: a. drawing a king and an ace on two drawsb. drawing a 2 or a 3 on either of two... more

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Statistics

12/02/21

Assume that the populations are normally distributed. Test the hypothesis σ1≠σ2 at the α=0.05 level of significance.

Please show the math used to solve the problem. Sorry some people just list answer with none of the math. thanks in advanceAssume that the populations are normally distributed. Test the hypothesis... more

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Statistics Math Regression Regression Line

12/01/21

Help Me Fit This Regression line Pleaseee

The following table displays the mathematics test scores for a random sample of, along with their final SY16C grades.a.Fit the regression line y=a+bx to the dataand interpret the results.b.Use the... more

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Statistics Probability

12/01/21

Probability normal distribution

A hospital is trying to improve quality in every area. One of the metrics they look closely at is the quality of physicians. Several individual measurements contribute to a physician's quality... more

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Statistics Data

12/01/21

Normal distribution

500 students are getting ready to take the bar exam. Assume that the scores can be approximated by a normal distribution. How many students do we expect to be within 2 standard deviations from the... more

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Statistics Math

11/30/21

Normal distribution

in a weightlifting championship that takes the form of a normal distribution with a mean of 265 and a standard deviation of 45, if an athlete wants to be in the top five of the distribution, what... more

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Statistics Math College Algebra

11/30/21

Find the equation of the line

The Slope is 3/2 and the y-intercept is (0,-2) what is the equation of the line in slope-intercept form?

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Statistics

11/30/21

Normal distribution

In a weightlifting championship that takes the form of a normal distribution with a mean of 265 and a standard deviation of 45, if an athlete wants to be in the top five of the distribution, what... more

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Answers •1

What is the formula for calculating this?

confidence interval

ITS LIKE ALIEN LANGUAGE HELP PLEASE

The results on a final exam given by a university professor are normally distributed with a mean of 65.3% and a standard deviation of 8.5.

It is estimated that 10% of the vehicles entering Canada from the United States carry undeclared goods.

Given 𝑿 is a normally distributed random variable with a mean of 155 and a standard deviation of 11.6, determine

Sketch a graph of a distribution that is positively skewed and state a real life example of when a positively skewed distribution would exist.

When correlation is not established, what is the best predicted value of the response variable?

Determine whether each of the following binomial distributions can be approximated using a normal distribution.

Determine the mean of a set of a normally distributed data with a standard deviation

Rewrite the following probabilities with a continuity correction.

Statistics, standard deviation, mean, and z score

Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 14 years and a standard deviation of 2 years.

A distribution of values is normal with a mean of 42.3 and a standard deviation of 49.1. Find P42, which is the score separating the bottom 42% from the top 58%.

A particular fruit's weights are normally distributed, with a mean of 493 grams and a standard deviation of 17 grams. The heaviest 19% of fruits weigh more than how many grams?

what is the probability that the sum of the dices is 4 ?

Probability and States

Probability and Stats

Assume that the populations are normally distributed. Test the hypothesis σ1≠σ2 at the α=0.05 level of significance.

Help Me Fit This Regression line Pleaseee

Probability normal distribution

Normal distribution

Normal distribution

Find the equation of the line

Normal distribution

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