If population parameter u and unbiased estimate of population is xbar then sampling error is as O IPbar - Hl
Q: 39) As the sample size increases, the standard error of the distribution of sample means: a…
A: We have to find correct answer..
Q: Sample 3 3.5 4 4.5 5 6 6.5 7 9 mean Probability 1/16 2/16 3/16 2/16 1/16 2/16 2/16 2/16 1/16 Find…
A: As per our guidelines we can solve first three sub part of question and rest can be reposted.…
Q: 3. Suppose 1500 runners are in a race. How many ways could the runners finish in 1t, 2nd and 3rd…
A:
Q: Compute for the variance of the sampling distribution
A: Given, Data 18 20 22 29 30 32 N = Population size = 6 n = sample size =4
Q: Mean=16mps, sample size is n=26, test statistc is 2.363 find p-va
A: Given that Mean=16mps, sample size is n=26, test statistic is 2.363 Degrees of freedom=n-1=26-1=25
Q: Show that SRSWOR provides efficient estimators of more population mean yn relative to SRSWR.
A: ANSWER: From the given data,
Q: What is the procedure for determining the sample size necessary to estimate a population mean given…
A: The population mean CI for known population standard deviation is X¯± ( Zα2σn)where X¯=sample mean…
Q: To obtain a maximum amount of variance, an item ought to have a degree of difficulty of what?
A: To obtain a maximum amount of variance an item ought to have a degree of difficulty is the number of…
Q: Suppose a population has 6 elements: 1, 2, 3, 4, 5, 6 with variance of 2.9166. If we sample with…
A: We have to find variance of sample mean..
Q: If we delete the largest observation from a sample, then the sample mean and variance will both be…
A: The mean is the average of a group of numbers, and the variance measures the average degree to which…
Q: An analysis of variance is used to compare the differences in for more than 2 populations. O…
A: According to the given information in this question. We need to identify the missing term from the…
Q: A fair die was rolled five times, then what are its population mean, population variance, and…
A: Mean is the average value around which the whole data set is concentrated. Mean for the set of 'N'…
Q: Obtain standard error of sample proportion p.
A: Standard error is the standard deviation of the sampling distribution of an estimator.
Q: The weight distribution of 100 NSU students is normally distribution with mean 70 kg and variance 2…
A: Given that mean is 70 kg and variance is 2 kg. That is, μ=70σ2=2 i) Consider,…
Q: What formula is used to gain information about a sample mean when the variable is normally…
A: Sample size: It is the number of observations in a sample under consideration. By increasing the…
Q: 3. What is the test variate used when the population variance is unknown and when the population…
A: There are two tests used for testing the population mean i.e. t-test and z-test. The t-test is used…
Q: 7. Let Y be a random variable with mean u and standard deviation s. What effect does increasing the…
A: We know that Sample size n , mean = mu And standard deviation s.
Q: The following sample data are from a normal population: 10, 8, 12, 14, 13, 11, 7, 5. a. What is the…
A: Given data is10,8,12,14,13,11,7,5sample size(n)=8
Q: sample size n o
A: The central limit theorem states that the sampling distribution of the mean approaches a normal…
Q: The data in personalities is bivariate normally distributed What is the correlation coefficient for…
A: Follow the steps below to get the correlation coefficient in excel: 1) Import the data in the excel…
Q: 500 participants were asked what coping method they use to overcome poor mental health. The results…
A: A table is given : Total outcomes (N) = 500 Let A represents mindfulness activity B represents…
Q: When calculating an ANOVA, if the research hypothesis is in fact true, then. variance due to group…
A:
Q: One difference between ANOVA and regression is: a) ANOVA is for statistical inference, whereas…
A: ANOVA - It is a statistical technique that is used to compare the whether the population means are…
Q: 2-For a sample of size 5, if x1 - = 5, x2 - i = -7, x3 - i= -4, x4 - i = 0, then determine the…
A:
Q: The following random sample (without replacement) is drawn from a population of 100 units : 5, 6, 3,…
A:
Q: ppose that 97% of Monarch butterflies migrate to Mexico in winter. What is the smallest sample size…
A: Given data, 97% of Monarch butterflies migrate to Mexico in winter p=97%=0.97 What is the smallest…
Q: Sample 3 3.5 4 4.5 5 6 mean Probability 1/16 2/16 3/16 2/16 1/16 Find the standard error of the…
A: Introduction: It is required to calculate the standard error of the sample mean using the given…
Q: How to find the minimum sample size required to estimate and unknown population mean?
A: To find the minimum sample size required to estimate and unknown population mean,We can use Cochran…
Q: If a sample of size 36 is selected from a population and its standard error of mean is 2, what must…
A: Measure of central tendency measures the central or average value of a dataset. Measured of…
Q: What statistical tool should be used when you want to compare 4 refrigerators to know if there is a…
A: Given Information: Consider the information in which you want to compare 4 refrigerators.
Q: What sample size should be used in a study conducted to estimate the average monthly absences of…
A:
Q: Assumption/s: One-way ANOVA can only be reliable if the data are normal Homoegeneity of variance…
A: ANOVA is analysis of variance. It is an analysis tool used in statistics.
Q: Explain how to identify the minimum sample size needed to construct a confidence interval for the…
A: Sample size for proportion is given by
Q: In order for our inferences from the sample to the population be valid, we must obtain samples that…
A: Here we have to check whether given statement is true or false. We know that the sample should be…
Q: One difference between ANOVA and regression is: a) ANOVA is for statistical inference, whereas…
A: From the above question One difference between ANOVA and regression is: the correct option is c) in…
Q: 5. The difference between the value of the sample statistic and the value of the corresponding…
A: Sampling error: It is the error which is the difference between the sample statistics and population…
Q: In a one-way ANOVA, what does Eta-squared mean? 1, it is the squared F-ratio 2. it is the…
A: Using Eta-square we measure effect size. Eta-squared is used to calculate proportion of variability…
Q: If an estimate of a population parameter is given by a single value, then the estimate is called
A: Estimation is used to calculate the value of population from observations of a sample drawn from the…
Step by step
Solved in 2 steps with 1 images
- If the variance of the civil Engineering board examination result is 81, what is the minimum number of takers needed to estimate the population mean with 95% confidence using a margin of error of 0.44True False When you test for differences between the moons of two independent populations, you can only use a two tail testWhen determining the sample size, the margin of error is double the same as not related half of OO interval width.
- You may need to use the appropriate appendix table or technology to answer this question. The following results are for independent random samples taken from two populations. Sample 1 Sample 2 n1 = 20 n, = 30 X1 = 22.7 X2 = 20.1 s, = 2.3 2 = 4.6 (a) What is the point estimate of the difference between the two population means? (Use x, - x,.) 2.72 (b) What is the degrees of freedom for the t distribution? (Round your answer down to the nearest integer.) 48 (c) At 95% confidence, what is the margin of error? (Round your answer to one decimal place.) 1.9 (d) What is the 95% confidence interval for the difference between the two population means? (Use x, - Round your answers to one decimal place.) .6 to 4.4Number 16Suppose that you want to test the mean of two populations whose variance is known. Your sample size is large and yo do not have any information about α significance level. Explain how you made this decision. If your test is right tail and test statistics value is 3.12 then what would be the P-value and your decision accordingly?
- Suppose I want to sample the household incomes for EBR parish. Let's say I start with a simple random sample of 100 residents and calculate the sample mean. How would the sampling distribution of change if I increase the sample size to 1,000 residents?2. As the size of a sample from a population increases, the standard deviation of the sampling distribution will tend to decrease. True False 3. If the sampling frame used to draw a sample does not include the entire population thenwhat are the mean and standard deviaton of the sampling distribution of the difference in sample proportions phatd- phate show your work and label each value
- A researcher wants to measure average cardiovascular health of university students and compare those scores to the average scores in the general population. Assuming that population variance is known, what statistical test is most appropriate for this study? independent-samples t-test single-sample t-test z-test for sample mean related-samples t-testCalculating sample variance requires a slight modification in the formula as compared to calculate in population variance. Why? a) the population parameter is equal to the sample statistic b) the sample variability is too difficult to measure directly c) samples have systematically more variability than the populations from which they are drawn d) samples have systematically less variability than the populations from which they are drawn
