8,971 Answered Questions for the topic statistics

Statistics

07/27/22

Statistics Confidence Intervals - Population Mean no Given
The population standard deviation for the age of YZ College students is 15 years. If we want to be 95% confident that the sample mean age is within two years of the true population mean age of YZ... more
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Statistics Math

07/27/22

Math problem question ( Please help me)
The data below illustrates Canada's median age as a relation to time.Year Median Age1911 23.81921 23.91931 24.71941 271951 27.71961 26.31971 26.21981 29.61991 33.52001 37.6 b.Find the algebraic... more
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Statistics Math

07/26/22

Math Problem question
Paolina has is an artist that can create 18 math paintings per day. Someone iswilling to pay Paolina $35/paints plus $1000 bonus.a. Find an algebraic expression that relates the number of paintings... more
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Statistics Math

07/26/22

Given 𝑓(𝑥) = 1/2𝑥+1 and g(x) = 3x – 1, determine (f • g)(x) and its domain.
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Statistics Math

07/26/22

You can jog at a constant speed of 6 km/h. If you can burn 1200 calories per 1800m, find how many calories you can burn jogging for 1.5 hours (find a composite function first).
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Statistics Math

07/26/22

If f(x) = sinx and g(x) = cosx, what is the impact when these functions are divided to form a compound function such as h(x) = f(x)/g(x) = sin(x)/cos(x). Explain.
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Statistics Math

07/26/22

Explain how the maxima and minima of f(x) = sinx, g(x) = sin(2x) and h(x) = sin(3x) affect the shape of k(x) = sin(x) + sin(2x) + sin(3x). You are adding the y-values of the function together.
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Statistics

07/25/22

Please Help Me!!!
You are the operations manager for an airline and you are considering a higher fare level for passengers in aisle seats. How many randomly selected air passengers must you​ survey? Assume that you... more
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Statistics

07/23/22

A highschool baseball player has a 0.32 batting average. In one game he gets 9 at bats. What is the probability he will get at least 3 hits in the game?
Round the answer to 3 decimal places
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Statistics Math

07/23/22

Confidence Intervals for Population Means

Assume that a sample is used to estimate a population mean μμ. Find the 80% confidence interval for a sample of size 544 with a mean of 20.6 and a standard deviation of 20.8. Enter your answer as a... more
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Statistics

07/23/22

Use this to predict the number of situps a person who watches 10.5 hours of TV can do.
A regression was run to determine if there is a relationship between hours of TV watched per day (x) and number of situps a person can do (y).The results of the regression... more
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Statistics

07/21/22

Math Question #8
The lengths of pregnancies in a small rural village are normally distributed with:μ= 264    σ=σ= 12In what range would you expect to find the middle 68% of most... more
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Statistics Math

07/21/22

Statistics - Required Sample Size for a Given Error
I solved following question, but I'm not sure whether I've taken the right approachAny help is highly appreciated!Question:An article in the Journal of Agricultural Science [“The Use of Residual... more
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Statistics

07/21/22

Math Question #6
Suppose we take a sample of size 229 from a population with p = 0.71.What is the standard deviation of the sampling distribution? Part 2:Suppose you want to lower the standard deviation to 0.01,... more
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Statistics

07/21/22

Math Question #5
A manufacturer knows that their items have a lengths that are skewed right, with a mean of 8.6 inches, and standard deviation of 2.6 inches.If 41 items are chosen at random, what is the probability... more
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Statistics

07/21/22

Math Question #5
A particular fruit's weights are normally distributed, with a mean of 511 grams and a standard deviation of 29 grams.If you pick 25 fruits at random, then 10% of the time, their mean weight will be... more
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Statistics

07/21/22

Math Question #4
Based on historical data, your manager believes that 42% of the company's orders come from first-time customers. A random sample of 165 orders will be used to estimate the proportion of... more
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Statistics

07/21/22

Math Question #2
Based on historical data, your manager believes that 33% of the company's orders come from first-time customers. A random sample of 76 orders will be used to estimate the proportion of... more
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Statistics

07/21/22

Math Question # 1
A population of values has a normal distribution with μ=80.6μ=80.6 and σ=34.8σ=34.8. You intend to draw a random sample of size n=151n=151.1.1, What is the mean of the distribution of sample... more
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Statistics

07/20/22

Statistics Question
You wish to test the following claim (HaHa) at a significance level of α=0.002α=0.002.      Ho:μ=52.8Ho:μ=52.8       Ha:μ>52.8Ha:μ>52.8You believe the population is normally distributed, but... more
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Statistics

07/20/22

Statistics Question
You wish to test the following claim (HaHa) at a significance level of α=0.05α=0.05.      Ho:μ=76.9Ho:μ=76.9       Ha:μ<76.9Ha:μ<76.9You believe the population is normally distributed, but... more
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Statistics Math

07/20/22

Confidence Interval for Sample Mean
A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (38.02, 61.98) and (39.95, 60.05)What is the value of the sample... more
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Statistics Math

07/19/22

Statistics - Pareto Distribution
I'm taking an Mathematical Stat course at university and I came up with this question.Question can be found via(the question involves hard to type notations, so I thought of uploading it and... more
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Statistics Math

07/19/22

Statistics - Pareto Distribution
Hello everyone! I'm taking an Mathematical Stat course at university and I came up with this question.Question can be found via(the question involves hard to type notations, so I thought of... more
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Statistics Math Sat Math

07/19/22

Statistics - Method of Moment Parameter Estimator
Let X1, X2, X3, ..., Xn be a random sample of size n from the population with mean µ and variance σ2 .What is the estimator of the population parameter σ2 if we use the moment method?
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