Suppose that we have disjoint normal populations A and B and we want to find the standard error estimate for estimating the difference in their means.  We have an IRS from A of size 16 with variance 25 and an IRS from B of size 6 with variance 36.  What is the resulting standard error estimate if we assume both populations have the same population variance?

Q: Need help please. Determine " the value of parameter, number of statistic, and the state of the…

A: Given that n=30 μ0=12,500x¯=10,000s=2000

Q: The variance in a production process is an important measure of the quality of the process. A large…

A:

Q: community has 1500 people with a mean age of 42 and a variance of 16. If you draw a random sample of…

A:

Q: Suppose a population has three values 13, 17 and 24. What is its variance?

A: Given: n=3 The mean of the data is obtained as below: Mean=∑xn=13+17+243=543=18 The mean is 18.

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: Suppose when a data set with 32 values is treated as a "population", the value of the (population)…

A: Given that  Population Variance = 145.2  n = 32

Q: b) The following table shows the time students from a college took to complete a marathon. Time…

A:

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

A:

Q: The range and the variance are both measures of distance.

A: Solution-: The range and the variance are both measures of distance.

Q: If 50 and 70 are the two elements of a population data set and their z-scores are -2 and 3,…

A: For  X=50, Y=70  Z score= -2 and 3 for point X and Y

Q: atement B: The variance is 1.5mm2  Set up the framework of an appropriate statistical test on…

A: Let be the population variance.Given that,Sample size Population variance Assume the level of…

Q: Suppose you know that the population variance for the weight of tractors is 4,000,000. What sample…

A:

Q: A report from the National Center for Health Statistics for 2010 showed that 20% of the adult…

A: The objective of this question is to find the average number of adult smokers in a sample of 25…

Q: What formula is used to calculate the sample variance?

A:

Q: For a particular population, is the population mean a variable? What about a sample mean?

A: Explanation:Since the population mean is constant, it cannot be variable. Population mean is a…

Q: A researcher has collected the following sample data: 3, 5, 12, 3, 2. The mean of the sample is 5.…

A:

Q: In analysis of variance, the F-ratio is a ratio of   a. Two mean squares   b. Two or more sample…

A: In this case, we need to identify the correct option for the given question.

Q: Dr. El-Saidi collected data on the number of hours spent by his 100 students over the weekend to…

A: Person mode of skewness: Skewness = 3(Mean-Median)/σ

Q: A researcher is trying to determine if racial background affects income. In a sample of 100 people,…

A: From the above data What proportion of the variance in income can be explained by racial background…

Q: We want to compare two population variances and draw a sample from each population for this purpose.

A: The two population variances are to be compared and sample from each population are drawn for this…

Q: What is the variance of the following data( 1, 2, 3, 4, and 5)?

A: According to the given information in this question We need to calculate the value of variance

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 the mean, variance, and standard variation of this data?

A: Data given 25,21.8,15.4,12.9,9.7,11.9,13.5,6.4,9,6.7,4.8,5,8,5.4,0.5,3.1,2,2.1,0.8

Q: The average number of newspapers for sale in an airport newsstand is 12, and the variance is 25. The…

A: We have given that  Average and variance for newspapers.  Average = 12 Variance = 25 Standard…

Q: A factor in determining the usefulness of an examination as a measure of demonstrated ability is the…

A: Given Information: The random sample of newly graduated law students, n=20 The sample standard…

Q: A researcher wants to estimate a population mean. The estimated average population variance from a…

A: A researcher wants to estimate population mean, the estimate average population variance…

Q: Suppose a researcher wants to determine if the proportion of students who graduate college in four…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: The data to the right represent the number of customers waiting for a table at 6:00 P.M. for 40…

A: The data are discrete because there are a finite or countable number of values.

Q: Given mean = 50, median = 48 and coefficient of skewness = 1. Find the value of the variance

A: A measure of central tendency is a single value that attempts to describe a set of data by…

Q: Suppose that the variance of the sample mean is equals 25 and the sample size is 6 . then the…

A:

Q: The goal of analysis of variance (ANOVA) is to a. detect differences in treatment variances (or…

A: Anova is used to determine whether the mean differences observed among the samples provide enough…

Q: The test for the equality of two population variances is based on which of the following? a The…

A: In testing of hypothesis, the population is often assumed to have normal distribution. This is…

Q: 7.Which of the values below is closest to the IQR for a normally distributed population with a…

A:

Q: The population variance of the data set provided below is 19. Find k. 1.3k 1.6k 2.2k 2.9k 3.5k…

A: We know the formula to Variance is given by, Variance= E(X2) - (E(X))2 Where E(X2) = (summation…

Q: It is not essential to know the value of the population variances to test for the equality of two…

A: Solution To test the equality of means the F test is used .

Q: Assume that we have a data set composed of three features. After doing PCA we find that the…

A: PCA.

Q: a. Calculate the variance of the scores for each woman. b. Are the scores for the younger woman more…

A: Let X denote the memory performance scores of the younger woman   and Y denote the memory…

Q: To get an unbiased sample variance, we divide by instead of which would give us a estimate of the…

A: Introduction The variance is a measure of dispersion.

Q: The Sample mean and sample Variance of Fire Jata valves are X = 104 and 5² = 16. If three of the…

A: The sample mean of 5 samples is The sample variance is Three data values are, The objective is to…

Q: 4.14 Find the proportion X of individuals who can be expected to respond to a certain mail-order…

A: Given,f(x)=2(x+2)5    ;  0<x<10                ; elsewhere

Q: what is the variance of the mean squared errors for this data set

A: The average number of people in a family attending college for various years is given in the table…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.