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Statistic
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
asked by Marilyn on October 20, 2008 
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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 
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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 
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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 
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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 
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A company with a large fleet of cars found that the emissions systems of 18 out of the 65 randomly selected cars they tested failed to meet pollution control guidelines. Is this strong evidence that more than 20% of the fleet
asked by Erica on May 11, 2011 
QMB2100
Chicken Delight claims that 90 percent of its orders are delivered within 10 minutes of the time the order is placed. A sample of 70 orders revealed that 60 were delivered within the promised time. At the .02 significance level,
asked by Ariel on July 29, 2013
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