a sample of 60 grade 9 student age was obtained to estimate the mean age of all grade 9 students. x = 15.3 years and the population variance is 16

Q: Green sea turtles have normally distributed weights, measured in kilograms, with a  mean of 134.5…

A: The z score indicates how many standard deviations that a data points away from the mean. It can be…

Q: Samples of size 2 200- Samples of size 5 150- 100어 100- 50- 28 Sample Mean Waist Size 0- 30 Sample…

A: The central limit theorem (CLT) is to be interpreted to identify the underlying distribution of the…

Q: The two types of variance that can occur in our data are A. Independent and dependent

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: A population of marine gastropods has shell lengths that are normally distributed with a mean of 7…

A: We have to find given probability.

Q: If the seefficient of determination is 0.81, the correlation coefficient

A:

Q: If the industry has an average cash deposit of 2100, which bank is performing better? Which bank is…

A: For the provided data, the appropriate visual representation is the Line Graph. The distribution of…

Q: Express the quartiles, Q1, Q2, and Q3, of a normally distributed variable in terms of its mean, μ,…

A:

Q: The length of an injection- molded plastic case that holds magnetic tape is normally distributed…

A:

Q: How do you find the standard error estimate of two disjoint populations, assuming they have the same…

A:

Q: The daily income of bank auditors in SSS Commercial Bank is normally distributed with a mean of P675…

A: Given

Q: the ____ is based on only two scores in a distribution. -deviations  -variance -range -standard…

A: We know that, Deviations refers to the distance between the observations from their corresponding…

Q: Let the variance of Y is 4x^2. What is the standard deviation of Y?

A: Given that: The variance of Y is 4x2.

Q: It was founč that the correlation coefficient between two variables calculated from a sample of size…

A:

Q: Is it possible to obtain a negative value for the variance or standard deviation?

A: The variance and the standard deviation, which is the square root of the variance are the most…

Q: What happens to the variance when outliers are eliminated replaced by values closer to the mean

A: Introduction:Mean:Mean is an important measure of center when the data is quantitative. Mean of a…

Q: the average length of a hospital stay for all diagnoses is 4.8 days. If we assume that the length of…

A: The number of days for 10% of hospital stays are longer is,

Q: An important first step in assessing the relationship of two interval level variables is: to…

A: Scatter plot: A scatterplot is a graphical representation of two variables. It is a graph of paired…

Q: If the variance of a Bar examination is 900, how large a sample is needed to estimate the true mean…

A: Variance=σ2=900, margin of error=moe=5, level of significance=0.01

Q: Refer to the data in images.  Test for a significant difference in the variances of the initial…

A: Solution: It is asked to test the claim that is there a significant difference in the variances of…

Q: The mean of a data set is 12.5 cm, and the variance is 4.0 cm. What is the z-score of 9.5?

A: Mean = 12.5 Variance = 4.0  Raw score = 9.5

Q: kes of cereal shows a sample standard deviation of .16 ounces. x = .05, the population variance…

A: Given that,  Hypothesized population variance =σ2=0.02 Sample size =n=41 Sample standard…

Q: In a herd of cattle, the mean milk production is 160 lbs per day with a variance of 400 Ibs per day.…

A: Given that the mean milk production in the cattle is,  μ=160 lbs per day & with a variance,…

Q: The average depth of the Hudson Bay is 305 feet. Climatologists were interested in seeing if the…

A: The random variable depth of the Hudson Bay follows normal distribution. We have to test whether the…

Q: For any quantitative population with a finite variance, the proportion of data points less than 2…

A: Given :- For any quantitative population with a finite variance, the proportion of data points less…

Q: Given correlation coefficient is 0.75, the percentage of explained variation is less than the…

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: The scores in a high school are normally distributed with a variance of 225. Suppose that 27.43% of…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: A population of marine gastropods has shell lengths that are normally distributed with mean μ=7mm…

A: For large sample size (n>30), let X be a random variable following normal distribution with mean…

Q: SAT scores are normally distributed with a mean of 1,800 and a variance of 22,500. Given arandom…

A:

Q: Fatteners have normally distributed weights, measured in kilograms, with a mean of 134.5 kg and a…

A: Let us denote X= weight of fatteners   Given that X follows a normal distribution with mean= 134.5…

Q: Assume that the correlation coefficient between the scores of a pre- and post- assessment that you…

A: 1. Correlation: A statistical method that is applied between the pairs of variables to check how the…

Q: The pH of rain, measured at a weather station in Michigan, was observed for 39 consecutive rain…

A: Given : n = 39 x¯ = 4.6982 s = 0.39623

Q: A set of data is mounded, with a mean of 450 and a variance of 625. Approximately what proportion of…

A: Normal Distribution :  Normal distribution, also known as the Gaussian distribution, is 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: The value of the standard deviation will always exceed that of the variance. TRUE OR FALSE

A:

Q: A population has a mean of μ = 100, a variance of σ2 = 9, and a standard deviation of σ = 3.  The…

A:

Q: The mean age of children at the X College daycare center is 6. The ages are skewed in a negative…

A: μ=6 σ2= 5.1

Q: Table below indicates the average number of injuries per thousand workers hours in a sample of 50…

A: Given information: The data represents the values of number of firms for the ranges of average…

Q: A correlation of +.20 means that [blank] of the variance in the outcome variable is accounted for by…

A: Solution: From the given information, r=0.20.

Q: A survey conducted by a research team was to investigate how the education level, tenure in current…

A: Consider a multiple regression model for the prediction of Annual income (in dollars) with three…

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 weekly income for a taxi driver during the first three weeks of lock down were recorded as…

A: Given, The weekly income for a taxi driver during the first three weeks of lockdown was recorded as…

Q: is 32, the estimate of the variance of the model errors is

A: Given: multiple regression model with no of regressors k=3 and sample size n=20  also error sum of…

Q: We have to compare the result of all variables using range,interquatile range,variance and standard…

A: As asked, for the given data we have to compare the result of all variables using the range,…

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: The length of an injection- molded plastic case that holds magnetic tape is normally distributed…

A:

Q: On average, ages of people in a sample deviate from the mean by 3.23 years. Find the variance. Do…

A: Given  We haven the standard deviation = 3.23

Q: If the variance of a national accounting examination is 900, how large a sample is needed to…

A:

Q: The scatter plot is used to examine the relationships between different functions in the statistical…

A: Solution: Scatter plot: Scatter plot is a graphical technique or method of identifying the linear…

Q: Once the correlation coefficient is known, how can we find the amount of the shared variance?

A: Concept:  correlation coefficient measures the degree of linear relationship between two variables.

Q: the homogeneity of variances assumption states that the variance in the two samples must be equal?…

A: Homogeneity of variances always make about the population variance not about sample.