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Distributions and appropriate statistics, Part I. For each of the following, state whether you expect the distribution to be symmetric, right skewed, or left skewed. Also specify whether the mean or median would best represent a typical observation in the data, and whether the variability of observations would be best represented using the standard deviation or IQR. Explain your reasoning.
(a) Number of pets per household.
(b) Distance to work, i.e. number of miles between work and home.
(c) Heights of adult males.
estimating the sample standard deviation using normal score.for a sample with a mean of m 85 a score of x 90
Supposed that from a population of 50 banks accounts, we want take a random sample of four account in order to learn about the population, how many different random samples of four accounts are possible?
Suppose that we doubt this claim and we carry out a hypothesis test to see if we can refute the claim. State the null hypothesis H0 and the alternative hypothesis H1 that we would use for this test.
weight status category and the corresponding percentiles and bmi ranges for 10-year-old boys in the states table.weight
Recent crime reports indicate that 4.2 motor vehicle thefts occur each minute in the United States. Assume that the distribution of thefts per minute can be approximated by the Poisson probability distribution.
Use the p-value method to conduct an appropriate hypothesis test at the 5% level of significance. Comment on the validity of your conclusion.
choose three articles select them based on the importance of the area of research relevance of the study
The distribution of the serve speeds was mound-shaped and symmetric. What proportion of the player's serves was between 89 mph and 128 mph?
a shell oil company executive says that a majority of workers more than 50 prefer a 10 hour four day work week over an
The dependent variable in the analysis, intention to leave (y), was measured on a quantitative scale. Identify the type (qualitative or quantitative).
Estimate the mean monthly rent paid by the whole student population. what is the probability that the sample mean exceeds the population mean by more than %5.
The mean tar content of a simple random sample of 25 unfiltered king size cigarettes is 21.1 mg, with a standard deviation of 3.2 mg.
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