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statistics
A sample of 100 iron bars is said to be drawn from a large number of bars. Whose lengths are normally distributed with mean 4 feet and S.D 0.6ft. If the sample mean is 4.2 ft, can the sample be regarded as a truly random sample?
asked by Sankar on July 17, 2013 
statistics
SAT Exam Scores – A school administrator wonders if students whose first language is not English score differently on the math portion of the SAT exam than students whose first language is English. The mean SAT math score of
asked by Liz on October 7, 2011 
Statistics
A national caterer determined that 87% of the people who sampled their food said that it was delicious. A random sample of 144 people is obtained from a population of 5000. The 144 people are asked to sample the caterer's food. If
asked by Grace on March 22, 2013 
math
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
In a study by Peter D. Hart Research Associates for the Nasdaq Stock Market, it was determined that 20% of all stock investors are retired people. In addition, 40% of all adults invest in mutual funds. Suppose a random sample of
asked by Brahmprakash on October 6, 2017

psychology
in his research, Dr. Caulfiel wants compare levels of tests anxiety among high school students in grade 10 and 12. His hypothesis is that seniors will have higher levels of test anxiety than sophomores will. His theoretical
asked by Josephine on June 13, 2014 
statistics
A personality test is administered to a large group of subjects. Five scores are shown below, in original units and in standard units. Fill in the blanks. 79 64 52 72 _ 1.8 .8 _ _ 1.4
asked by amanda on September 11, 2008 
business statistics
for a sample of 12 items from a normally distributed population for which the standard deviation is = 17.0, the sample mean is 230.8. At the 0.05 level of significance, test Ho : μ ≤ 220 versus Hı: μ >220. Determine and
asked by Candy on July 29, 2009 
Statistics
WEB CALCULATOR EXERCISE Descriptive Statistics 1 The table below presents data for a sample of people who completed a religious survey. Age Gender Denomination Church Attendance 56 1 7 4 46 2 6 5 49 2 6 5 49 1 1 5 27 2 9 5 51 1 4
asked by Joe on January 28, 2014 
statistics
The Computer Anxiety Rating Scale (CARS) measures an individuals level of computer anxiety, on a scale from 20 (no anxiety) to 100 (highest level of anxiety). Researchers at Miami University administered CARS to 172 business
asked by GG on October 21, 2010 
university of phoenix
4.Suppose you administered an anxiety test to a large sample of people and obtained normally distributed scores with a mean of 45 and standard deviation of 4. Do not use webcalculator to answer the following questions. Instead,
asked by shirley on November 29, 2011
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