8,957 Answered Questions for the topic statistics

Statistics Algebra 2

07/03/22

Probability question

If Sally is given 6 exam prompts to study and 4 of the 6 will appear on the exam, is it true that she will only need to study for 3 prompts for one to be on the exam?
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Statistics

07/02/22

Continuous Uniform Distribution Question
The lengths of a professor's classes has a continuous uniform distribution between 50.0 min and 52.0 min. If one such class is randomly selected, find the probability that the class length is... more
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Statistics

07/01/22

What is the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.9 in?
Suppose that an airline uses a seat width of 16.9 in. Assume men have hip breadths that are normally distributed with a mean of 14.5 in. and a standard deviation of 1 in. Complete parts​ (a)... more
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Statistics

07/01/22

What is the probability the elevator is overloaded?
An elevator has a placard stating that the maximum capacity is 2016 lb- 12 passengers.​ So, 12 adult male passengers can have a mean weight of up to 2016/12=168 pounds If the elevator is loaded... more
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Statistics

07/01/22

Comparing nominal and ordinal variables .
Hi,I am conduction a prospective study, in which I follow up patients using a questionnaire, and I repeat the same questionnaire in different stages of the follow up. The collected data from the... more
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Statistics

07/01/22

Probability question Fair die

A fair die is rolled four times. What is the probability that it comes up 5 at least once? Write your answer as a fraction or a decimal, rounded to four decimal places.
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Statistics

06/30/22

1) A statistics professor at a large university had an assignment where his students would sample from the population of all the students at the college living on campus....
1) A statistics professor at a large university had an assignment where his students would sample from the population of all the students at the college living on campus. Each of his 400 students... more
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Statistics Algebra 2

06/30/22

Create an explicit exponential equation to model the change in quantity of pesticide present in the soil over time.
The amount of a particular pesticide in soil decreases by 1.15% per day after application. A homeowner applies 68 grams of the pesticide to a square yard section of lawn. Create an explicit... more
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Statistics

06/30/22

What is the critical value?
What is the critical value for z0.05
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Statistics

06/30/22

What are the bone density scores?
Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find the bone... more
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Statistics

06/30/22

What are the cutoff values?
Assume that the readings on the thermometers are normally distributed with a mean of 0° and standard deviation of 1.00°C. Assume 3.2​% of the thermometers are rejected because they have readings... more
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Statistics Probability

06/30/22

Suppose that x is a normal random variable with u=5 and o=2. What is the probability that the absolute value of x is at least 8.74?
µ=5σ= 2
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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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