What formula is used to gain information about a sample mean when the variable is normally distributed or when the sample size is 30 or more?

Q: How do you calculate the sample variance for proportions when the sample is drawn from a dichotomous…

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Q: When data is normally distributed the mean equals the median True False

A: Normal distribution

Q: A sampling distribution of means for samples of students taking the SAT exam has a population mean…

A: It is given that the sampling distribution has a population mean 500 and standard error 200.

Q: What is an everyday example of variance within samples?

A: If we need to know the variance within samples, we need to use ANOVA Test.

Q: What term is used to explain the natural difference between a sample mean the overall population…

A: What term is used to explain the natural difference between a sample mean the overall population…

Q: If the Mean of a data set is 700 and the Variance is 49; Calculate the intervals used for the…

A: Given information, Mean of a data set = 700 Variance = 49 We have to calculate intervals using…

Q: What is the drawback of summarizing the data using the median

A: Median: Median is the middle value of the set of numbers. The set of numbers should be arranged in…

Q: The absolute difference between the population mean and the sample mean is called the

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Q: When data is normally distributed the mean equals the mode. True

A: Normal distribution

Q: what is the value of the mean and median if the data is normally distributed

A: We have given that the diagram percentage of Pigs vs weight in lbs.

Q: Explain the formula for the variance of the sampling distribution of the mean?

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: If there is a large amount of variation, then on average, the data values will be far from the mean.…

A: The given statement is 'If there is a large amount of variation, then on average, the data values…

Q: What is mean of this set of data

A: Given: data we can tabulate the data x Frequency(f) 0 1 1 3 2 2 5 1 10 1

Q: random sample of about 1000 people to estimate the mean of some quantity over a population of…

A: A confidence interval estimate is an interval estimate that includes the unknown population…

Q: What statistical calculation, which results in the same units as the measured data, represents the…

A: Introduction: For a random variable X taking n sample values, the sample variance is given by the…

Q: Do I have to take many samples from my population to create a sampling distribution of the mean in…

A: Basics of sampling distribution of mean:The sampling distribution of the sample mean is essentially…

Q: Suppose the rate of misprints in the printed text from a given publisher is three misprints per one…

A: The question is about discrete probability distribution.Introduction :1 ) Let, X be discrete random…

Q: Formulate the mean of the sampling distribution of the difference between means ?

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Q: What are the steps for a hypothesis test for population mean when the variance is known?

A: Given the variance for hypothesis test for population , To write the steps for the hypothesis test…

Q: Describe when you would use an analysis of variance versus an independent samples t-test.

A: Analysis of variance (ANOVA) is used when we have more than two independent samples whereas…

Q: which one is more precise sample variance or population variance

A: We want to tell you which one is more precise.

Q: What is formula for the variance of the population?

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Q: Marks obtained by students in a school examination follows a normal distribution. If 32% of the…

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Q: Can you find a set of data such the mean, median, and variance are all equal to each other?

A: A normal distribution is a common probability distribution . It has a shape often referred to as a…

Q: I am lookin for the relationship between the sample mean and the population mean and also the…

A: An estimate mus be having few properties in the sense of best estimate.Unbiasdness is one the…

Q: what test is used to determine whether two population means are different when the variance are…

A: Solution :  when the variance are known and sample size is large then we use z test to determine…

Q: The sample data here is the cholesterol levels for 10 men diagnosed with high cholesterol. The first…

A: Result Option 3 is correct. The mean cholesterol level of males who take the medicine is lower than…

Q: What is the best point estimate for the population's variance if the sample variance is 41?

A: Given,sample variance(s2)=41

Q: What is the mean of a distribution of means that is blank the means of the population?

A: Given problem Given that

Q: What percentage the male population is between 72 and 76 inches in height?

A: The height of men in country is normally distributed with mean of 6 feet and variance of 16 inches…

Q: quation for The standard deviation of the distribution of sample means

A: Sample mean of the sample of size n follow normal distribution.

Q: Where are most of the data gathered in a negatively skewed distribution? Which value is largerthe…

A: We have to describe the negatively skewed  distribution and locate the position of mean relative…

Q: The mean for data set is 59, the standard deviation is 4, and the z- score is 0.03, what is the raw…

A: Here given that the mean =59, standard deviation=4, z score=0.04, we need to find the raw score x.