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1. In your own words explain the difference between a point estimate and an interval estimate of a parameter? Which is better? Why?
2. What information is necessary to calculate a confidence interval? Is the size of the population relevant when one is determining the sample size for a confidence interval? What is necessary to determine the sample size?
3. A researcher is interested in estimating the noise levels in decibels at area urban hospitals. He wants to be 90% confident that his estimate is correct. If the standard deviation is 4.8, how large a sample is needed to get the desired information and to be accurate within 0.65 decibels?
You have the following information about rates in London for Eurocurrency loans of one-year duration, the exchange rate between the USD and euros, the currency in which you want fi
Conduct a test to determine if the proportion of males that responded true to the statement in the survey that, "Whole foods (i.e. raw vegetables and meats) contain sodium," is dif
it seems that 14% of engaged women buy a wedding dress at least one size smaller than their current size
Ask qComparing Two Samples: 1. Apply the function "plot" to the formula that relates the response "frequency" to the explanatory variable "march2007" in order to produce the two bo
Uses of mean
how we can solve semi average method
What is the properties of a simple random sample when 50 females are numbered 1 through 50, and males are numbered 51 through 100?
The dataset also contains a variable y , which is the dependent variable of interest, as well as x1 , x2 , x3 , x4 , x5 , and x6 , all explanatory variables that are potentially
1. Mention the characteristics of Statistics. Explain any two applications of Statistics. 2. Distinguish between primary and secondary data. What are the methods of collecting prim
Company statistics is the technology of good selection in the face of concern and is used in many professions such as financial statistics, econometrics, auditing, generation and f
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