(d) What happens to the interval as the level of confidence is changed? Explain why this is a logical result As the level of confidence increases, the width of the interval This makes sense since the

Q: Why do researchers use other types of standardized distribution? Explain the reason using the…

A: Introduction: The z-score is a standardized score, obtained by shifting the location (mean) of a…

Q: find the sample variance for following data set using xi and xi^2 in shortcut formula... 20.2, 21.8,…

A: Here, we need to find the sample variance of the given data using the shortcut formula. Shortcut…

Q: Prove the general formula for interval estimation of ratio of population variance.

A: Statement:-  If x1,x2..... xn ~ N(μx, σx2) and y1, y2 .....ym ~ N(μy , σy2) are independent random…

Q: Define sampling variability?

A: In general, variability is also called as range.

Q: calculate the standard error of the sampling distribution of the sample statistic

A: Let S.E denote Standard Error. Let sample mean be the sample statistic.

Q: n by age group (this means to calculate the relative frequencies after separating the data based on…

A: Under 30 30-39 40-49 50 and over Promoted 16 22 26 15 Not-promoted 38 39 45 38

Q: = calculated for both quantitativé Mean Variance Midrange

A: The mode is the value with the highest frequency, that is, the mode is the value in the data-set…

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: 36) An unbiased estimator is a statistic that targets the value of the of the population parameter…

A:

Q: What is statistical inference? What are the reasons that make it possible to estimate population…

A: In statistical inferencing, the statistical methods are used to analyze the sample data which helps…

Q: Refer to the sample data for pre-employment drug screening shown below. If one of the subjects is…

A: Positive test result drug use is indicated Negative test result drug use is not indicated…

Q: What happens to the proportion of intervals that include the population proportion as the sample…

A: The formula for the confidence interval of population proportion can be written as: Here n is the…

Q: 12,15,6,3,7,9,8,4,14,19,18,16,13,15,14,12,15,5 find sample standard deviation for given data

A:

Q: Difference between study population and target population

A: Population is total of all individual units.

Q: Describe similarities and differences between sample findings and population facts and between…

A: We need to state differences between 1. Sampling findings and population facts 2. parameter and…

Q: find mean and standard deviation   12,13,15,16,17,19,22,23,25,28,30

A: Given data is  12,13,15,16,17,19,22,23,25,28,30 From these data we have to calculate mean and…

Q: Ely Zabala, a municipal health data officer, was tasked to create a report describing the height of…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: What are the main differences between outliers and influential observations

A: Outlier and inferential observations are both observed in the regression. In the scatter diagram,…

Q: 11. What does the "paste" button allow you to do when in the analyze tab for statistical analysis?

A: The Paste button translate your instruction from the dialig box into SPSS command lines.

Q: As a general rule, approximately what is the smallest sample size that can be safely drawn from a…

A:

Q: Define deviation condition. Why are deviation conditions so important in an attributes…

A: Deviation condition: Deviation condition refers to the case in point at which the client personnel…

Q: What assumption regarding the population is necessary for making an interval estimate for the…

A: It is assumed that the population follows normal distribution with known population variance.

Q: 17. How do you identify outliers in a dataset?

A:

Q: 5. Summarize the results from an analysis (two-way ANOVA) performed on the data graphed below.…

A: Comment on the significant differences of factor-A1: There are 2 factors a1 and a2. The hypotheses…

Q: What are the steps for finding the relative frequency of sample means above or below a specified…

A: Frequency distribution: The number of times each value of X repeats is the frequency of that…

Q: What is interpolation? Discuss the method for constructing the divided difference table for…

A: Interpolation is the method of constructing new data points within the range of a discrete set of…

Q: Listed in the data table are amounts of strontium-90 (in millibecquerels, or mBq, per gram of…

A: The data of amount of strontium-90 in baby teeth obtained from the residents in two cities are…

Q: Create sample survey question with choices or possible answers for each of the following type or…

A: Qualitative data is a non-numeric, categorical data. A discrete quantitative variable is one that…

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: Can you show me a step explanation on how to find the standard deviation for a sample proportion…

A: As per central limit theorem the formula for standard deviation for a sample proportion is,

Q: is the difference between the estimated value from the sample (sample statistic) and an actual value…

A: There is some difference exist between sample statistics and population parameters

Q: In a distribution plot, if mean is much smaller than median, does the underlying sample have very…

A: Outliers- It is an observation or a value that lies outside from the population or which is far away…

Q: what is the sample size if the standard deviation is 8 and margin error is 3 at 99%

A: We have given that,  Standard deviation (σ) =8, margin of error (E)= 3 and confidence level (C.I) =…

Q: find standard deviation for sample below   4,8,9,5,6,7,8,5,3

A:

Q: Can you help me understand the difference between stratified and systematic samples in simple terms

A: Here we have to understand the stratified and systematic sampling in simple terms.

Q: In terms of ratio projections and difference projections why are they important in non-statistical…

A: Ratio projections and difference projections are important in non-statistical sampling because they…

Q: 7. If we change the significance level from 5% to 1% how will that change affect the pvalue for the…

A: P value is probability of getting extreme results than what is observed. *Suppose you are doing left…

Q: Having outliers in our data may affect the IQR but the sample range is unchanged True False

A: The sample range is defined as Range = Max - min. And the IQR is calculated as IQR = Q3 - Q1

Q: Choose a process that audit analytics is used to test, which statistical sampling method would be…

A: In this particular question we need to find out the process that audit analytics is used to test.

Q: What are the hypotheses that must be established in a statistical test? Toggle and null sample…

A: In research, the researcher first makes a claim about the population. Then , the hypotheses is…