8,918 Answered Questions for the topic statistics

Statistics Algebra 2

06/28/22

Find an exponential model for this data, where t = 0 corresponds to 2006. (Keep at least 5 decimal places.
In the year 2006, the age-adjusted death rate per 100,000 Americans for heart disease was 241.5. In the year 2009, the age-adjusted death rate per 100,000 Americans for heart disease had changed to... more
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Statistics Algebra 2 Probability

06/28/22

To create an entry​ code, you must first choose 2 letters and​ then, 6 ​single-digit numbers. How many different entry codes can you​ create?
It must be a whole number
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Statistics Probability

06/27/22

What is the probability of getting 0 queens after drawing 7 cards?
Standard 52 card deck with 4 queens.
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Statistics

06/25/22

A population score has population mean =100 and deviation =10 what is the z score
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Statistics

06/25/22

Please help in question a and b and show the formula and steps
An automobile manufacturer collects mileage data for a sample of 9 cars in various weight categories by use of a standard grade of gasoline with and without a particular additive. The Engines were... more
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Statistics Algebra 2

06/25/22

Find horizontal asymptote for the function
A business has a cost function of C=0.4x+8000, where C is measured in dollars and x is the number of units produced. The average cost per unit is given by C' = C/x = 0.4x+8000/x, x>0.Find... more
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Statistics

06/25/22

Statistic question
Assume that adults have IQ scores that are normally distributed with a mean of 98.9 and a standard deviation. Find the first quartile 22.9, which is the IQ score separating the bottom​ 25% from the... more
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Statistics

06/24/22

Probability distribution,

x P(x) 0 0.25 1 0.3 2 0.1 3 0.35 Find the expected value of this probability distribution. Round your answer to one decimal place.I keep getting this answer wrong. Help
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Statistics

06/23/22

probability of m&ms
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

06/20/22

Stats, confusing question

Describe how you could use normal distribution to describe how a lightbulb company decides whether or not a lightbulb is defective?
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Statistics

06/20/22

Tutor responds with wrong answers
What happens if a tutor does not listen to what the professor states is incorrect? I had a tutor who was wrong on the entire assignment and got charged twice.
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Statistics

06/20/22

Express the confidence interval 10.3 % ± 4.9 % in interval form.
Express the confidence interval 10.3%±4.9% in interval form.
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Statistics

06/20/22

testing and measurements
At what level would the following variables be measured? a. Distances between towns b. Intelligence measured by an IQ test c. The rank ordering of members of a class based on height d. The... more
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Statistics

06/19/22

Please help me with this question
In​ Marissa's calculus​ course, attendance counts for 20% of the​ grade, quizzes count for 20% of the​ grade, exams count for 45% of the​ grade, and the final counts for 15% of the grade. Marissa... more
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Statistics

06/18/22

Standard deviation
About 2 % of the population has a particular genetic mutation. 100 people are randomly selected. Find the standard deviation for the number of people with the genetic mutation in such groups of 100
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Statistics

06/17/22

Please help solve
You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 72%. You would like to be 90% confident that your... more
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Statistics

06/16/22

A venture capitalist

A venture capitalist, willing to invest $1,000,000, has three investments to choose from. The first investment, a software company, has a 9% chance of returning $11,000,000 profit, a 35% chance of... more
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Statistics

06/16/22

Joint Distribution of Ranndom Variables
Suppose the joint distribution of random variables X and Y is given as:Part a)Determine the marginal distribution of X. Give your answer as a Python list named pX, where the first, second, and... more
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Statistics

06/16/22

Calculate the Z-Scores

How do I calculate the Z-scores that correspond to weight
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Statistics

06/16/22

calculate the z-score that correspond to 11kg
calculate the z-score that corresponds to 11kg.
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Statistics

06/16/22

I need help please
The graph illustrates a normal distribution for the prices paid for a particular model of HD television. The mean price paid is $1000 and the standard deviation is $140. Answer the following... more
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Statistics

06/16/22

I need help please
The mean daily production of a herd of cows is assumed to be normally distributed with a mean of 38 liters, and standard deviation of 8.9 liters.A) What is the probability that daily production... more
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Statistics

06/16/22

math I need help please
For a standard normal curve find the z-value with 1010% of the data to the right of it. Round your answer to two decimal places.
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Statistics

06/16/22

math 146 I need help
A population of values has a normal distribution with μ=155.5μ=155.5 and σ=9.8σ=9.8. You intend to draw a random sample of size n=173n=173.Find P61, which is the score separating the bottom 61%... more
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Statistics

06/16/22

math 146 I need help

The heights of adult men in America are normally distributed, with a mean of 69.8 inches and a standard deviation of 2.62 inches. The heights of adult women in America are also normally... more
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