uppose 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 9  and an IRS from B of size 4.  The POOLED variance is 18.72.  What is the MARGIN OF ERROR for the 99 percent confidence interval for the difference of populati

Q: A sample data has a distribution that has a single mode and is strongly positively skewed. An…

A: It is given that the sample is Positively skewed.  In positively skewed distribution :  Mean of the…

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: 80% of a patient with a certain disease will be successfully treated with a new medical treatment.…

A: According to the given information, We have Probability = 80%=0.80Sample size = 40

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: When solving a problem related to one sample and the confidence interval of variance. Which table…

A:

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: We can eliminate some outlier problems by using O a. Interquartile range O b. Range O C. Coefficient…

A: We have to find correct option.

Q: If the mean of a random variable is 30 and the standard deviation is 6, and three consecutive data…

A: It is given that, Mean,μ=30 Standard deviation,σ=6

Q: If r = 0.7 for the probability and statistics course grades of 30 students, construct a 95%…

A: Confidence interval for correlation coefficient is given by,

Q: The analysis of variance (ANOVA) is a procedure that allows statisticians to compare three or more…

A: ANOVA stands for Analysis of Variance. It is a statistical method that separates observed variance…

Q: If a population has a mean of 3.5, what is the mean of the sampling distribution if the sample size…

A: Given,sample size(n)=4population mean(μ)=3.5

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

A:

Q: Even if a treatment has no effect, it is still possible to obtain an extreme sample mean that is…

A:

Q: A sample of n = 26 scores has SS = 125. What is the variance for this sample ?

A: According to the given information, we have SS = 125 n = 26

Q: Click on the Data button below to display the data. Copy the data into a statistical software…

A: Given data, Guernsey Jersey Holstein 4.59 5.03 3.22 5.2 6.55 3.67 5.61…

Q: When is the population standard greater than the population variance?

A: Variance: The variation between each observation from its mean is known as variance. The greater the…

Q: Two samples from two different populations are given: (а) Sample 1: 19.8, 12.5, 13.2, 16.9, 18.3,…

A: Let σ12 be the variance of population 1 and σ22 be the variance of population 2. Hypothesis: Null…

Q: Professor Hayashi wants to see if a new Canvas Homework system has an effect on how well students…

A: Sample mean = x̅ = 81.7 Sample size = n = 9 Sample S.D = s =√32.49 = 5.7 Standard Error = s/√n…

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: if the sample mean is 10, the population standard deviation is 20, and the sample size is 25, then…

A:

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 formula for the variance of the population?

A:

Q: A manufacturer of metal plates makes two claims concerning the thickness of the plates they produce.…

A: From the given data in part (b), we calculate sample mean and sample variance Mean,…

Q: What is the likely media when the mean is 9 the sample variance is 7.31 and the skew is 1.04

A: Given data:  mean  =9 sample variance  = 7.31 skew =1.04

Q: Suppose that you want to perform a hypothesis test based on independent random samples to compare…

A:

Q: Consider a data set with a very high sample variance measurement. What would you expect the impact…

A: Let a data set have a high sample variance. The histogram is used to visualize a grouped frequency…

Q: the distribution of sample means consists of the

A:

Q: An important problem in industry is shipment damage. A electronics distribution company ships its…

A: For the given data Find the 95% confidence interval for mean

Q: Problem: The number of misdirected luggage cases reported for 5 consecutive weeks at the domestic…

A:

Q: IQ tests are approximately normally distributed with a mean of 100 for adults. A tech company CEO…

A: Solution: Here, the hypothesis test is to be conducted if the average IQ of employees at high-tech…