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The final exam in a statistics class consisting of 20 students was worth 100 points.
The top 6 scores were 75, 75, 81, 88, 92, and 94.
The bottom 6 scores were 41, 44, 49, 52 53, and 53.
Find the 85th percentile of the score distribution
Find the interquartile range of the score distribution.
Determine 80% confidence interval for average weights of Allen's hummingbirds in study regions. Determine the margin of error?
recent recommendations suggest 60 minutes of physical activity per day. a sample of 50 adults in a study of
a softball player brags that he is a 0.300 hitter yet at the end of the season he has gotten 21 hits in 84 at bats. is
A dataset has 1000 records and 50 variables with 5% of the values missing, spread randomly throughout the records and variables. An analysis decides to remove records that have missing values. About how many records would you expect would be remov..
According to the National Football League, the average salary for players for the 2010 season was about $1.9 million while the median salary is around $770,000. Why are both numbers reported? What might the difference between the two statistics me..
This study investigates whether there are differences in the outcomes of three different treatments for anxiety
Consider the Xbar charts shown below for two processes. The charts may OR may not have instances of special cause variation. Identify ALL violation(s) (if any) of the eight tests where statistical signals show that special cause variation is ind..
It is suspected that high pollution levels (measured by number of particulates found in the air) increase the levels of asthma attacks. A researcher collects data on50 people who experienced an asthma attack during the course of one year.
is it appropriate to use the standard normal distribution as a substitute for the t distribution with n - 1 degrees of freedom in estimating a population mean?
Identify the explanatory variable and the response variable. A teacher wants to determine if the type of textbook used by her students can be used to predict the students' test scores.
a new grug had a potency advertised at 75. given the following smaple datan25x bar 76.6s1a check manufacturers claim
in a premlinary test of the microsort method of gender selection 14 couples were treated and 1.3 of them had baby
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