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Statistics
A confidence interval was used to estimate the proportion of statistics students that are females. A random sample of 72 statistics students generated the following 90% confidence interval: (0.438, 0.642). Based on the interval
asked by Student on August 11, 2008 
Elementary Statistics
1) Construct a confidence interval of the population proportion at the given level of confidence. x=60,n=300, 99% confidence. The 99% confidence interval is (_,_) 2) A researcher wishes to estimate the proportion of adults who
asked by Erin on June 6, 2012 
Statistics
Which of the following statements correctly interprets a 95% confidence interval on a population mean? a. It is a single point estimate b. Used to quantify the certainty of the sample standard deviation c. A 99% confidence
asked by Beata Chmielewska on September 15, 2010 
Statistics
A savings and loan association needs information concerning the checking account balances of its local customers. A random sample of 20 accounts was checked and yielded a mean balance of $664.14 and a standard deviation of 235.29.
asked by Giselle on April 22, 2015 
Stastics
Which of the following descriptions of confidence intervals is correct? (Select all that apply) a. If a 95% confidence interval contains 0, then the 99% confidence interval contains 0 b. If a 99% confidence interval contains 0,
asked by Lindsay on April 25, 2016

MATH
The following data represent the asking price of a simple random sample of homes for sale. Construct a 99% confidence interval with and without the outlier included. Comment on the effect the outlier has on the confidence
asked by LADO on November 30, 2014 
Math
Calcium is essential to tree growth because it promotes the formation of wood and maintains cell walls. In 1990, the concentration of calcium in precipitation in a certain area was 0.11 milligrams per liter (mg/L). A random sample
asked by LADO on December 3, 2014 
stats
Question 5 of 10 Why are partial regression coefficients necessary in multiple regression? (Points : 1) Multiple variables each provide some of the same information. Each variable involved contributes a unique error component.
asked by please help on July 20, 2014 
Statistics
. As the sample size increases The confidence interval also increases (gets larger) The confidence interval decreases (gets smaller) The confidence interval stays the same The population mean increases.
asked by Jacob on June 22, 2010 
Statistics
Let π1,β¦,ππ be i.i.d. random variables with distribution ξΊ(π,π) , for some unknown parameter π>0 . Find an interval Iπ (that depends on π ) centered about πβ―β―β―β―β―π such that P(Iπ
asked by ramj on June 7, 2020 
Statistics
5. A random sample of size 81 has sample mean 20 and sample standard deviation 3. (a) Is it appropriate to use a Studentβs t distribution to compute a confidence interval for the population mean ΞΌ? Explain. (1 mark) (b) Find a
asked by Anonymous on April 4, 2019
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