The distribution of the number of personal time off (PTO) days per year offered by different U.S. companies is skewed to the right. The mean number of days is 10.7 1. We collect data on the number of personal time off days from a random sample of 50 New England companies. Why is it okay to use these data for inference even though the population is skewed? 2. The standard deviation of the 50 companies in our sample was 9 days. Specify the sampling model (shape, center, spread) for the mean number of PTO days of such samples 3. This sample of randomly chosen New England companies produced a 90% confidence interval of (10.07, 14.33) days. Does this interval provide evidence that number of PTO days are unusually high here in New England?

Q: . A developmental psychologist is interested in studying how long babies gaze at a photograph of a…

A: Data given n=6, 10, 13, 16, 16, 20, 24

Q: A team of researchers (Singer et al., 2000) used the Survey of Consumer Attitudes to investigate…

A: Solution

Q: Comment on the sample size used in this study. Specifically, is the sample unnecessarily large? Is…

A: From the given information we want to know the given sample size is good or not.

Q: Part 1 of 4 (Choose one) ▼ tr (a) The following dotplot illustrates a sample. can cannot 10 The…

A: Hello, thankyou for the question. According to our honor code can answer only three parts at a time.…

Q: Because of safety considerations, in May 2003, the Federal Aviation Administration (FAA) changed its…

A: Given information: x¯summer=183x¯winter=190nsummer=100=nwinterssummer=21swinter=24 a)…

Q: Determine the sample mean ?̅ and sample variance ?2 of this dataset. 2.The president of the company…

A: Given: n = 8 Formula Used: Sample Mean X = ∑i=1nXin Sample Variance S2 = ∑(Xi-X)2n-1 Median =…

Q: Determine the mean of all sample modes.  Based on your result, is the sample mode an unbiased…

A: Mean of all sample modes, Modes: 0,0,10, 0,0,0,0,10, 10, 10 Mean of modes= (10+10+10+10)/10 = 4

Q: What type of question is this-estimation or hypothesis? What type of study is this sample data or…

A: 1.What type of question is this-estimation or hypothesis? => here we have to test Godness of fit…

Q: If a population has a mean of 2.5, what is the mean of the sampling distribution if the sample size…

A: Introduction: It is required to find the mean of sampling distribution of the mean, when a sample of…

Q: Discuss the characteristics of the basic descriptive statistics: sample size, mean, and standard…

A: Characteristics of mean: Mean represents all the values of the data. Outliers of the data affects…

Q: The College Board SAT college entrance exam consists of two sections: math and evidence-based…

A: To solve this problem, we'll proceed with the following steps:Perform a paired t-test since the data…

Q: Although, in practice, sample data are generally analyzed in inferential studies, what is the…

A: If the data consists of different methods for estimating the sample and drawing the inferences about…

Q: 1. Statistical Literacy Explain the difference between a stratified sample and acluster sample.

A: Stratified sampling:   In the stratified sampling, the units in the population are divided into…

Q: level of significance and sample size

A: Level of significance: It is the probability of rejecting H0 when H0 is true. Sample size: it is…

Q: f a research study reports a very borderline significance level, just a very small amount outside of…

A:

Q: I'm currently working on sampling distribution and proportions in my college intro to stats class.…

A: It is given that p is 0.1 and n is 500. Therefore, q = 0.9 (= 1 –p = 1 – 0.9).

Q: What is the difference between using a population or using a sample to carry out a statistical study

A: A statistical population is a collection of individuals from which to draw statistical inferences,…

Q: Does the one observed sample mean qualify as a common or a rare outcome? Explain.

A: Sample mean qualify as a common outcome if the difference between the sample mean and the actual or…

Q: Some people are concerned that new tougher standards and high-stakes tests adopted in many states…

A: Given : x = 210 n = 1782 Hypothesis : H0 : p ≤ 0.103 Ha : p > 0.103 p^ = 2101782 p^ = 0.1178 sp^…

Q: If you wanted to compare two societies on anomie, or normlessness, what indicators might you look…

A: Given : Anomie is a social phenomenon which prevents significant bond between individuals and the…

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: Explain in your own words: What is sampling error? What is a representative random sample?

A: we explain in the following.

Q: 13) Mike plays for a basketball team. The height of players is normally distributed, with a mean of…

A:

Q: Consider the following data: 8,8, 3, 8, 3,3,9 Step 1 of 3: Calculate the value of the sample…

A: x x2 8 64 8 64 3 9 8 64 3 9 3 9 9 81 ∑x=42 ∑x2=300

Q: Pick a sample problem where despite a high correlation between two quantitative variables why…

A: Given information: Correlation and Causation

Q: What is the Sample Distribution of means and why is it called a "special Kind of Population"?

A: We have to know about sampling distribution of sample means.We need to understand it in brief.

Q: Consider the following data: 9, 11, 14, 14, 1, 9, 5 Step 1 of 3: Calculate the value of the sample…

A: The given data values are,  9, 11, 14, 14, 1, 9, 5 The value of sample mean is,

Q: “The 2011 Sleep in America® annual poll was conducted for the National Sleep Foundation by WB&A…

A: here given  The National Sleep Foundation sponsors an annual poll. In a March 2011 press release…

Q: If the sample size is n=16 what is likely true about the shape of the population?

A: Solution:  Central limit theorem: The central limit theorem state that as the sample size increases…

Q: 24. If an analysis of variance is used for the following data, what would be the effect of changing…

A: 24. The formula for sum of squares within(Error) is SSwithin=∑SSi. When the value of SS2 changing…

Q: Pooling (i.e. combining) two cross sectional datasets leads to an increase in sample size. True…

A:

Q: Smallpox Vaccine. ABCNEWS.com published the results of a poll that asked U.S. adults whether they…

A:

Q: QUESTION 1 Which of these control chart types allows constant sample size? i. C-chart i. U-chart ii.…

A: Here we want to know control charts which allows constant sample size.

Q: . For each of the following, determine the sample size needed to get the desired accuracy of the…

A: For the first part we have to find sample size needed when  margin of error, population standard…

Q: What is the importance of getting a sample from a population? When and why is it necessary?

A: The population is defined as a large group in which the units involved have the same…

Q: Smallpox Vaccine.ABCNEWS.com published the results of a poll that asked U.S. adults whether they…

A:

Q: Consider the following data: 2, 10, 14, 12, 4, 4, 10 Step 1 of 3: Calculate the value of the sample…

A: 2,10,14,12,4,4,10Sample of size(n)=7

Q: 4. How many determiners are part of the sample underlying the following statistical model?…

A: We need determiners part of the sample underlying the following.   Let us see,   Let's first define…

Q: Agri-Beef, Inc. is a large Midwestern farming operation. The company has been a leader in employing…

A: Solution (a) Given a=0.08, |Z(0.04)|=1.75 (check standard normal table)So 92% CI isxbar±Z*s/√n…

Q: A power analysis is a calculation used to estimate the smallest sample size needed for an…

A: 1)It is impossible to overstate the value of power analysis in an experiment. It is a vital tool for…