03/17/23

Find the z-score that separate the middle 32% of the distribution from the area in the trails of the standard normal distribution.
Find the z-score that separate the middle 32% of the distribution from the area in the trails of the standard normal distribution.
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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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10/15/22

What is the standard deviation of the distribution of all possible sample means?
 The mean test score for all students in Math221 was 80 with a standard deviation of 14. If we took a random sample of 24 test scores, what is the standard deviation of the distribution of all... more
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10/15/22

What can you conclude about the shape of the test score distribution?
The mean test score for exam 1 was 82, while the median was 88. What can you conclude about the shape of the test score distribution?
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03/23/22

Find P61 find the value and sample mean
A population of values has a normal distribution with μ=245.2μ=245.2 and σ=48.8σ=48.8. You intend to draw a random sample of size n=84n=84. Please answer the following questions, and show your... more
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03/23/22

Calculus Question
Suppose y =  2x + 1 , where x and y are functions of t.(a) If dx/dt = 6, find dy/dt when x = 4.dy/dt=_____(b) If dy/dt = 3, find dx/dt when x = 24.dx/dt=_____
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03/23/22

find probability

A leading magazine (like Barron's) reported at one time that the average number of weeks an individual is unemployed is 30 weeks. Assume that the length of unemployment is normally distributed with... more
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03/23/22

A population of values has a normal distribution with μ=208.5μ=208.5 and σ=94.8σ=94.8. You intend to draw a random sample of size n=85n=85.
A population of values has a normal distribution with μ=208.5μ=208.5 and σ=94.8σ=94.8. You intend to draw a random sample of size n=85n=85. Please show your answers as numbers accurate to 4 decimal... more
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03/22/22

Derivative question, can someone explain it to me?
Differentiate tan(x-y)= y/((x^2)-2). Do not solve for y'
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03/22/22

Help me please its urgent

A fast food chain store conducted a taste survey before marketing a new hamburger. The results of the survey showed that 75% of the people who tried this hamburger liked it. Encouraged by this... more
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03/22/22

A fast food chain store conducted a taste survey before marketing a new hamburger. The results of the Find the probability that at least six of the eight customers will like this hamburger
A fast food chain store conducted a taste survey before marketing a new hamburger. The results of the survey showed that 75% of the people who tried this hamburger liked it. Encouraged by this... more
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03/20/22

Hypothesis Testing - How to identify the claim?

To see whether people are keeping their car tires inflated to the correct level (35 psi), a tire company employee selects a sample of 36 tires (randomly) and checks their pressure. The mean of the... more
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03/18/22

A chemist wants to make 54 ml of a 17% acid solution by mixing a 10% acid solution and a 19% acid solution. How many milliliters of each solution should the chemist use?
A chemist wants to make 54 ml of a 17% acid solution by mixing a 10% acid solution and a 19% acid solution. How many milliliters of each solution should the chemist use?
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03/17/22

Which is an equation for the line that passes through the points (3,0) and (0,2)
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03/17/22

You are apart-time crew at a fast food chain. Suppose you serve a certain number of customers every hour.
You are apart-time crew at a fast food chain. Suppose you serve a certain number of customers every hour. Assume the number of people you have served in 3 hours and let this be your population... more
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03/17/22

If one of the pedestrian deaths is randomly selected, find the probability that the driver was not intoxicated. (Please enter a decimal, and round your answer to 4 decimal places.)
Driver Intoxicated? Pedestrian Intoxicated? Yes Yes 41 72 No 215 647 The Blank Is No
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03/16/22

Non Standard Distributions, Central Limit Theorem
Find the area of the shaded region. The graph to the right depicts IQ scores of​ adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. 102 122 A... more
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03/16/22

How do I start this off? I keep getting my answer incorrect.

From a group of 8 people, you randomly select 5 of them.What is the probability that they are the 5 oldest people in the group?
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03/16/22

Hi I need help!
The number of chocolate chips in an​ 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. ​(a) What is the... more
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11/28/21

You want to obtain a sample to estimate a population mean.
Based on previous evidence, you believe the population standard deviation is approximately σ=31.8. You would like to be 95% confident that your estimate is within 4 of the true population mean.... more
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11/17/21

question in description
Mr. Newman bought 8 tickets to a chili supper and spent a total of $30. He bought a combination of adult tickets for $5 each and child tickets $3 each. Which system of equations below will... more
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