In order to study the mean blood pressure of people in his town, Richard samples the population by dividing the residents by age and randomly selecting a proportionate number of residents from each age group. Which type of sampling is used?

Q: tudies if age correlates with the average number of hours of sleep, so she selected a random sample…

A: Given: sample size(n)=10   Age(x) Hours of sleep(y) xy x^2 y^2   8 8 64 64 64   15 8 120 225…

Q: Based on the boxplot and descriptive statistics, which group shows more variability in narcissism…

A:

Q: While estimating from a sample, you should always try to get a biased B,. Is this correct? O Yes O…

A:

Q: Find the sample size using the range rule of thumb to estimate a.

A: Given : Highest observation=155 bpm Lowest observation=35 bpm Margin of error=E=3 bpm Significance…

Q: describe the sampling distribution of the sample means in the histogram

A: A histogram of sample mean is given.

Q: A sample selected by taking the members of the population that are easiest to reach is called a…

A: Convenience samplingA sample that is made up by people that are easy and very convenient to reach is…

Q: Among 1815 randomly selected high school students surveyed by the Centers for Diseases Control, 300…

A: Given X=300 n=1815

Q: To determine whether a sample should be treated as a simple random sample, which is more important:…

A:

Q: How much difference is there between the mean for the treated sample and the mean for the original…

A: Definition Sample Mean x It is the mean of all the values of a sample.   Population μ It is the mean…

Q: As the sample size increases, what happens to the p-value associated with a given sample mean?

A: In statistics, the sample size is the no of units present in a sample that is drawn from a…

Q: To study the mean blood pressure of all people in her state, Christine samples the population by…

A: Convenience sampling can be defined as the method of sampling in which the researcher selects the…

Q: Consider the Sample mean, Xn. estimator of population as an

A: From the given information, Sample mean, X¯n is an estimator of population mean, μ. From the central…

Q: Find a sample size for which the median will always equal one of the values in the sample.

A: Median: The median is the middle-most observation in an ordered (in an ascending or descending…

Q: The daily online newspaper America at a Glance has just published an article detailing a study of 50…

A: Given that  In Histogram  the proportion of Mathematics test score  Find the the proportion of…

Q: What is the formula to be used to determine the total possible random samples?

A: Let the population size be N Sample size be n

Q: Estimate the the sample variance

A: Given, n=6 α=1-0.80=0.20 The sample mean and than the sample  variance is obtained as-…

Q: The sample should include men and women.

A: Margin or error = 0.02 z-critical value at 0.05 = 1.96

Q: the sample mean is the best estimate for population mean true or false

A: We have given that  the sample mean is the best estimate for population mean.

Q: a) Explain how you can select a systematic sample of size 7 from a population of size 60.

A: Sampling designs: Simple random sampling: In simple random sampling, all the units in the population…

Q: Explain how each portion of the ANOVA table is calculated, ultimately leading to the F statistic.

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: On the right are ratings for passers in a football league. Find the three quartiles for the ratings

A: The first or lower quartile is given by, Q1 ={ (n+1)/4 } th term In the given data, n= 10 Q1 =…

Q: When working with the sampling distribution of a sample proportion, what do we need to require to…

A: Sampling Distribution of a Proportion There are several ways to calculate the sampling distribution…

Q: To quantify the average discrepancy between sample means and population means, researchers compute

A: This part comes under estimator estimation

Q: The amount spent on textbooks for the fall term was recorded for a sample of five university…

A: According to the provided information, the data are $400, $350, $600, $525, and $450

Q: What are some limitations of the experience sampling methond? How do the data this method provides…

A: The limitations of experience sampling method and how its data compares with that of self-report…

Q: What is Statistical Measure of the Amount of Variation in a Population?

A: Standard deviation: The standard deviation indicates by how much each observation differs from a…

Q: Assume the scores at this school have the same distribution as national scores. What is the mean of…

A: here given , The scores of individual students on the American College Testing (ACT) Program…

Q: What is the value of the sample correlation r?

A: It is given that Regression line : y = -3.05 + 0.10x Number of observations n = 13 Number of…

Q: Explain how you can select a systematic sample of size 7 from a population of size60

A: Determine the procedure for selecting the systematic sample of size 7 from a population of size 60..…

Q: According to the Law of Large Numbers what effect will increasing the sample size have on the sample…

A: It is given that the sample size increases.

Q: State one possible advantage of using paired samples instead of independent samples.

A: Provide the possible advantage of using paired samples instead of using independent…

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

A:

Q: According to the text, a researcher studied the effects of concentrations of lead on the life…

A: Sampling is a way of selecting cases from a population.

Q: What is the difference between Sample and Population? Provide an example of each.

A: Population -whole number of individuals Sample - a part of population taken randomly

Q: The table on the right table s of adults (from many sample

A: According to the sum, A table is given of the probability distribution of the number of adults who…

Q: In a paired samples t test, explain the logic of difference scores (why do you need to find them to…

A: PAIRED T-TEST: The paired t test is also defined as dependent- t test.  This test is used to test…

Q: I am lookin for the relationship between the sample mean and the population mean and also the…

A: An estimate mus be having few properties in the sense of best estimate.Unbiasdness is one the…

Q: What is the 25th percentile of a χ2 distribution with 20 degrees of freedom? What symbol is used to…

A: It is an important part of statistics. It is widely used.

Q: Why is sampling often preferable to conducting a census for the purpose of obtaining information…

A: Taking a sample is speedy and more cost effective than carrying out a census, and more knowledge…

Q: State the one-way ANOVA identity, and interpret its meaning with regard to partitioning the total…

A: One-way ANOVA identity is given below: SST=SSTR+SSE

Q: In a paired samples t test, explain the logic of difference scores (why do you need to find them to…

A: Paired t test:The paired t test is also defined as dependent- t test. It is used to test the mean…

Q: It is not important to collect samples randomly. True or false

A: Any sample must be collected using the random techniques. If the samples are not collected randomly…

Q: Explain why increasing the sample size tends to result in a smaller sampling error when a sample…

A: Sampling error:When a sample is used to estimate a population characteristic, the error resulting is…

Q: Compose the score values for 3 samples that have the same mean and median, but differ in the amount…

A: Part 1   2, 4, 6 3, 4, 5 4, 4, 4     Explanation: Part 1   There are many different conceivable…

Q: what happens to the mean as the sample size increases?

A: It is given that the sample size is increasing.

Q: The sample mean X is a point estimate of the

A: Population is the whole set of observations that are used for study. Sample is the subset of the…