when do we use the statistical treatments
Q: What is the third quartile
A: We are asked to find the third quartile
Q: This is rejecting Ho when it is true. If the alternative hypothesis says not equal to we know are…
A: We have to match the given definitions with the given terms.
Q: When do you need to calculate and use a Z - Score? What are the assumptions when you use a Z score?
A: We have to find need of calculate and use of z score..
Q: • Describe how the values of u and o affect the graph of the normal distribution.
A: It is required to complete the characteristics of normal distribution functions. It is asked to find…
Q: Carry out the statistical test and state your conclusions.
A: 5) The null hypothesis is a simple statement about the value of the population parameter which is…
Q: We can conduct forecasting for short-term periods. However, if it contains an unsystematic/random…
A: By using short-term time series forecasting method, values of very near future can be obtained based…
Q: List two ways that you can improve statistical power.
A: Methods to increase statistical power:- 1. use a large sample- if we use larger sample then it…
Q: The average student studies eight hours for a statistics exam and receives a grade of µ = 84. In a…
A: The random variable studying twelve hours follows normal distribution. We have to find the critical…
Q: What is Estimated Standard Error of the Mean?
A:
Q: What do the mean deviation, variance and standard deviation all have in common? How is this common…
A: Mean deviation, standard deviation and variance all measure the spread of the distribution.Mean…
Q: What can we learn from analyzing the standard deviation for a dataset that we can't learn from the…
A: The measure of central tendency provides a measure about the center of the set of the observations.
Q: What is z Score?
A: A z-score is a score which is computed to find out the number of standard deviations a value is away…
Q: Define how to use t-Statistic in Regression When the Sample Size Is Small? Explain Use of the…
A: The t statistics is divided by its standard error coefficient. The default error is an approximation…
Q: What is difference between chi and binomial statistics? When do we use regression analysis?
A: Hey there.! thank you for posting your question hope you're doing well.
Q: How do we calculate standard deviation?
A: Standard Deviation A number that expresses how much the members of a group deviate from the group's…
Q: When do you use the t-statistic and what is the advantage over the z-statistic?
A: Conditions for using t statistic: The t statistic is used in the hypothesis testing, for testing the…
Q: As the sample size increases, the variability among the sample means increases decreases remains the…
A: Concept: Variability in a data represent how dispersed data is from its mean.
Q: A researcher conducted a research that majority of people who died during pandemic bought a new…
A: Given: Research that majority of people who died during pandemic
Q: Derive variance for gamma distribution?
A:
Q: The mean score on stat finals for all Hartnell students is 78/100. Is this a parameter or a…
A: The parameter represent the population .
Q: What are the statistical techniques used to measure the dispersion? Give an example?
A: The statistical techniques which are used to measure the dispersion are variance, standard…
Q: A researcher has a hypothesis that a specific drug may have a higher prevalence of side effects…
A: The hypothesis is that a drug may have a higher prevalence of side effects among members of the…
Q: When can we apply chi-square distribution?
A:
Q: When I'm trying to infer the population mean from a small sample, why do I have to rely on the…
A: The assumptions for the z-statics is appropriate as given below:The samples are randomly selected…
Q: After your research study your learned that there is a 6-point difference between two sample means.…
A: The effect size is the ratio of mean difference to the standard deviation.
Q: Derive mean for gamma distribution?
A:
Q: Without construct the chart, determine whether the process appear to be in statistical control.
A: The descriptive analysis is conducted using EXCEL. The software procedure is given below: Enter the…
Q: Explain kurtosis of the distribution?
A:
Q: What is the Small Values of Squared Correlation Coefficient?
A: The squared correlation coefficient is known as coefficient of determination denoted by R2.
Q: What is statistical inference
A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…
Q: The distribution of internalizing behavior as measured by the Child Behavior Checklist is normal…
A: It is given that the mean is 50 and the variance is 100.
Q: Perform a statistical test.
A: Hello, since your question has multiple sub-parts, we will solve the first three sub-parts for you.…
Q: If no data values are given but the mean and standard deviation is given how do I find the variance…
A: The formula for the variance and standard deviations are,
Q: The dependent is variance inflation factor, make a decision whether it need to drop any variables.
A: Given information: The output of multiple linear regression model is given.
Q: a) Briefly explain the Normal Distribution, its derivation and use.
A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…
Q: what do the mean deviation, variance and standard deviation all have in common? How is this helpful…
A: Variance, standard deviation and mean deviation:Variance is the average of squared difference of…
Q: Why do we standardize normal distributions?
A: X~N(mean=μ, variance=σ2) Z score=(X-μ)/σ ~N(mean=0, variance=1)
Q: f cases fall more than 1.5 standard deviations away from the mean?
A: Given that 1.5 standard deviations away from the mean We know that Z score is the value that…
Q: Sarah thinks that she has lost interest in online shopping. Based on her shopping history, she can…
A: The null hypothesis is a simple statement about the value of the population parameter which is…
Q: Derive the mean and variance of normal distribution. Show your complete solutions.
A: Solution:- Mean of normal distribution The Gaussian pdf is defined as fX(x)=1σ2πexp-(x-μ)22σ2 where…
Q: How is dfwithin and dftotal calculated in statistics? Please write out words for formulas.
A: Given that
Q: Describe the step-by step procedure for statistical testing
A: Hypothesis testing : A statistical hypothesis is a hypothesis that can be tested based on observed…
Q: In ANOVA, main effect always refers to?
A: Let a treatment A be classified into k levels then, to test the equality of k levels means, we will…
Q: WHAT STATISTICAL ANALYSIS IS USED IN Measuring the Gadgets Usage of Children at Home during…
A: The usage of gadgets by children at home during quarantine can be analyzed by calculating mean hours…
Q: A researcher is looking at the relationship between rates of lung cancer and smoking status. they…
A: There are two variables in the study; *Smoking status of subjects, in terms of yes or no. *Lung…
Q: When I’m trying to infer the population mean from a small sample, why do I have to rely on the…
A: Assumptions to use standard normal distribution to estimate population mean:The required conditions…
Q: Should we conclude (for this second study) that the mean birthweight of children is higher (at level…
A: Given that there are 100 pairs of women. degrees of freedom: df=n-1=100-1=99 Test statistic:…
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