8,943 Answered Questions for the topic statistics

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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Statistics Probability

07/19/22

What is the probability of flipping 3 coins and all three landing on heads? P(Answer ) = Answer 0.125 (Enter your answer as a decimal. Do not round.) HINT: Change the fraction to a decimal.

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Statistics

07/19/22

For this study, we should use z-test for a population proportion Correct The null and alternative hypotheses would be:
10% of all students volunteer. Is the percentage of students who are volunteers different from students receiving financial aid? Of the 359 randomly selected students who receive financial aid, 39... more
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Statistics

07/19/22

Math Question 4
Given the interval estimate for the mean (5.2, 15.2), the point estimate for the mean is , and the margin of error is 
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Statistics

07/19/22

Math Question 3

You measure 29 randomly selected textbooks' weights, and find they have a mean weight of 53 ounces. Assume the population standard deviation is 12.4 ounces. Based on this, construct a 95%... more
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Statistics Math

07/18/22

Assume that military aircraft use ejection seats ?
Assume that military aircraft use ejection seats designed for men weighing between 138.9 lb and 203 lb. If​ women's weights are normally distributed with a mean of 171.8 lb and a standard deviation... more
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Statistics

07/18/22

Hypothesis Tests for a Single Population Proportion
Test the claim that the proportion of people who own cats is significantly different than 90% at the 0.1 significance level.The null and alternative hypothesis would... more
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Statistics

07/17/22

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 232-cm and a standard deviation of 1.2-cm. For shipment, 26 steel rods are bundled together.
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 232-cm and a standard deviation of 1.2-cm. For shipment, 26 steel rods are bundled together.Find... more
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Statistics

07/17/22

A study was conducted on students from a particular high school over the last 8 years....
A study was conducted on students from a particular high school over the last 8 years. The following information was found regarding standardized tests used for college admitance. Scores on the SAT... more
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Statistics

07/16/22

Confidence Intervals - Means
You measure 26 textbooks' weights, and find they have a mean weight of 62 ounces. Assume the population standard deviation is 5 ounces. Based on this, construct a 95% confidence interval for the... more
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Statistics

07/15/22

Statistics and Probability

What price do farmers get for their watermelon crops? In the third week of July, a random sample of 40 farming regions gave a sample mean of x = $6.88 per 100 pounds of watermelon. Assume that 𝜎 is... more
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Statistics

07/15/22

Statistics on stimulant abuse and congestive heart failure
I want to know what percentage of people who have had a history of stimulant abuse die of congestive heart failure and other heart related diseases?
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Statistics Math

07/15/22

Method of Moment Estimators
A sample of 4 observations (0.4, 0.7, 0.7, 0.9) collected from a continuous distribution with density,f(x) = θ*(x^(θ−1)) ; 0 < x < 1Estimate θ by the method of moment.
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Statistics

07/15/22

Stats Homework...
Suppose that a car company wants to determine the importance to consumers for service like OnStar, which offers drivers a wifi connection (among other things). Small/preliminary studies have... more
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