TechBuzz is an IT company that monitors the status of large data warehouses. According to TechBuzz, last year the majority of the data servers used by energy-based companies were over-utilized. A sample of 190 servers (all used by energy-based companies) showed that 142 were over-utilized, 12 were used efficiently, and 36 were underutilized. a. What is the point estimate of the proportion of the servers that were under-utilized? b. Determine the margin of error and provide a 95% confidence interval for the proportion of the servers that were over-utilized. c. What is the minimum sample size to ensure that the desired margin of error (in part b) is at most 0.04?

Q: Does the sample median tend to target the population variance

A: If the original distribution is normal, the sample mean will also be normal, with variance , where n…

Q: What is an important property of estimates of effect size?

A: An effect size which is used to indicate the difference between two sample means divided by the…

Q: Imagine a study comparing two groups:  undergrad vs. graduate students in terms of stress level.  To…

A: Provided that here is a study comparing two independent groups :  undergrad vs. graduate students in…

Q: An entertainment company surveyed 360 elementary school children and found that 153 of them were…

A: There are 153 out of 360 (n) elementary school children found as above grade level readers. The…

Q: When a population distribution is moderately skewed, unimodal, without outliers?

A: The sampling distribution of the statistic is said to be symmetric if any of the following…

Q: Could two samples have the same range but different means? Explain.

A: Yes, Two samples have the same range but different means.

Q: A Deloitte employment survey asked a sample of human resource executives how their company planned…

A: Solution To test the hypothesis we will use chi square test.

Q: If you view the company’s performance record as a representative sample of its overall sales…

A: Data given in order Monthly Sales 6267.19 7058.06 7119.5 7147.18 7198.52 7298.09…

Q: A standardized exam consists of three parts: math, writing, and critical reading. Sample data…

A: (1)   Obtain the point estimate of the difference between the mean scores for the two tests.   The…

Q: If the population of ABM students of Malaya Integrated High School has a mean of 12.45, what is the…

A: Since you have asked multiple questions, we will solve the first question for you .If  you want a…

Q: When trying to summarize a set of numerical data, why is giving a measure of center such as the mean…

A: Introduction: A measure of central tendency of data is a measure of the tendency of the values to…

Q: The measure of central tendency which is used for categorical data is .... ..

A: The properties of a dataset influence the choice of a central tendency measures. For categorical…

Q: What is an unusually small or unusually large data value called? a. outlier b. sample statistic C.…

A: an unusually small or unusually large data value is called ?

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: Find the point estimate of the true proportion of people who wear hearing aids if, in a random…

A: It is an important part in statistics . It is widely used in all statistical procedures .

Q: What proportion of the sample reported that they had been cyberbullied?

A: Givensample size(n)=14795No.of respondents say yes they had been cyberbullied(x1) = 2219No.of…

Q: Explain the Representative Sample from a Population in Which the Variables Are Related?

A: The population is the area of interest for which, one want to inquire the characteristics or trend.…

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

A: This part comes under estimator estimation

Q: . When an accurate and complete list of the population is not available, a sampling will suffer…

A: We want to tell you, which one is the correct choice.

Q: if the population of ADM students of malaya integrated high school has a mean of 12.45,what is the…

A: Given : Population Mean = 12.45

Q: Histograms are primarily used to examine normality of distribution shape of each group, whereas…

A: Answer:-  It is true that, histograms are primarily used to examine normality of distribution shape…

Q: why is the decline in cohort quality overestimated in cross-sectional data?

A:

Q: What is the relationship between a frequency or relativefrequency distribution of a quantitative…

A: Justification:Qualitative and quantitative data:Qualitative data are non-numerical measures such as…

Q: Explain why the mean is often not a good measure of central tendency for a skewed distribution.

A: Solution-: We find why is the mean often not a good measure of central tendency for a skewed…

Q: Auditors for the Military Airlift Command (MAC) are checking the arrival times of the three charter…

A: Given, Auditors for the Military Airlift Command (MAC) are checking the arrival times of the three…

Q: compared to the median, the mean number of hours that participants watch television is ___.  -lower…

A: The given Statistic is :

Q: Explain the concept of Missing Data and Sample Selection?

A:

Q: Name the 4 circumstances where the median would provide a better measure of central tendency than…

A: Central tendency: The value that is used for describing the full data set using the central position…

Q: five-number summary, the following is not included:   median third quartile mean minimum (smallest)…

A:

Q: Explain the relationship between populations and sampling frames in social research.

A: Let SF denote sampling frames.

Q: What is a sampling distribution of means? Use your knowledge of the standard error of the sample…

A:

Q: Calculate the Variance, Frequency, and Percentage of the given sample Research Data.

A: Given information: Data(x) 2 6 8 24 26 52 55 75 75 96 128 135 135 156 165

Q: Explain why the margin of error determines the accuracy with which a sample mean estimates a…

A:

Q: A relatively elderly county, whose majority of registered voters are Democrats, with a mean…

A:

Q: Chebyshev's Theorem says that at least 95 percent of the data lie within 2 standard devlations of…

A: Chebyshev's theorem states that the proportion of observation is no less than 1-1k2 from the mean.…

Q: What is the relationship between the mean of a population and the mean of its sampling distribution?

A:

Q: Why does the mean inaccurately summarize a skewed distribution?

A: If the distribution is symmetric then mean is accurately summarized the data because it is exactly…

Q: A sample of 426 U.S. adults age 50 and older were asked how important a variety of issueswere in…

A: Introduction: A population in Statistics is defined as the collection of all possible objects,…

Q: (b) Predict what will happen to the data distribution if outlier exists in the data.

A: An outlier is defined as that value in the data set, that lies at an extreme distance as compared to…

Q: The bookstore at IRSC would like to estimate the proportion of students who prefer electronic…

A: Sample size n = 30 Number of students who prefers eBook X = 4   Formula Used: Point estimate of…

Q: In almost all research studies, data are obtained from samples. A. True в. False

A: In almost all the research studies ,data are obtained from the samples  True  False

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: Consider a sample with data values of 53, 55, 70, 58, 64, 57, 53, 69, 57, 68, and 53. Computethe…

A: Given data : 53, 55, 70, 58, 64, 57, 53, 69, 57, 68, 53

Q: If the mean time to respond to a stimulus is much higher than the median time to respond, what can…

A: There can be three different shape of the distribution: 1) Positively skewed: Most of the values…

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…

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.