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statistics
Assume that women's heights are normally distributed with a mean given by u=64.6 in and a standard deviation given by 0=2.8in. a) If 1 woman is randomly selected, find the probability that her height is less than 65in. b) If 49
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A restaurant that bills its house account monthly is concerned that the average monthly bill exceeds $200 per account. A random sample of twelve accounts is selected, resulting in the sample mean of $220 and a sample standard
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. Two thousand randomly selected adults were asked whether or not they have ever shopped on the internet. The following table gives a twoway classification of the responses obtained. Have shopped Have never shopped Male 500 700
asked by David on June 11, 2013 
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Recall that Benford's Law claims that numbers chosen from very large data files tend to have "1" as the first nonzero digit disproportionately often. In fact, research has shown that if you randomly draw a number from a very large
asked by steph anne on April 21, 2017

Statistics
A group of 56 randomly selected students have a mean score of 30.8 and a standard deviation of ó = 4.5 on a placement test. Find a 95% confidence interval for the mean score, ì, of all students taking the test.
asked by Erica on November 1, 2010 
Math (Statistics)
PLEASE GET BACK TO ME ASAP!! 1) Use the given data to find the minimum sample size required to estimate the population proportion. Margin of error: 0.04; confidence level: 94%; q̂ unknown a. 486 *** b. 572 c. 553 d. 587 2) Use
asked by Green on May 5, 2020 
MathStatistics
Suppose you want to test the claim that mean is not equal 3.5. Given a sample size of n = 45 and a level of significance of a = 0.10, when should you reject H0 ? A) Reject H0 if the standardized test statistic is greater than 1.96
asked by Jenny on December 12, 2009 
math
2) In a certain instant lottery game, the chances of a win stated as "3 in 23". Express the indicated degree of likelihood as a probability value between 0 and 1 3) A certain company reduced its management staff from 20 managers
asked by Jamie on March 15, 2012

statistics
A final exam in sociology has a mean of 72 and a standard deviation of 9.2. If 35 students are randomly selected, find the probability that the mean of their test scores will be greater than 76. Round to tenth of a percent
asked by Anonymous on June 13, 2012 
Business Statistics
1 When the necessary conditions are met, a twotail test is being conducted to test the difference between two population proportions. The two sample proportions are p1= 0.25 and p2 = 0.20 , and the standard error of the sampling
asked by Lesliam on August 11, 2009 
P Value Math Statistics
Find the Pvalue for the indicated hypothesis test with the given standardized test statistics, z. Decide whether to reject H0 for the given level of significance a. twotailed test with test statistic z= 1.57 and a=0.04
asked by Katie on February 24, 2013 
statistics
At a local high school students were randomly assigned to one of two math teachers Mrs smith and mrs jones. After the assignment, Mrs Smith had 30 students and mrs jones had 25 students. at the end of the year each class took the
asked by Anonymous on March 27, 2012
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