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The data shown represent the scores on a national achievement test for a group of 10th grade students.
Find the approximate percentile ranks of these scores by constructing a percentile graph (Ogive).
Use the Ogive, estimate percentile of a student who scored 200 points in the test? What is the student
score must be in order in the 90 percentile?
Score
classes
Freq. Score
upper
limit
Cumulative
Freq.
Relative
< 196.5 0 < 196.5
196.5 – 217.5 5 < 217.5
217.5 – 238.5 17 < 238.5
238.5 – 259.5 22 < 259.5
259.5 – 280.5 48 < 280.5
280.5 – 301.5 22 < 301.5
301.5 – 322.5 6 < 322.5
Total 120
A survey of college students collected information on several variables: Distance from Home, Age, Major, Gender, and Class. The variable Major is
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We are doing a team project for our statistics class and our project is about "Math Anxiety". We are stuck on one question and the questions is "the teams will state the null and alternative hypotheses
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The average cost for service provided per person per day is random variable with normal distribution of N$ 100 and a standard deviation of N$ 22. What is the probability that the cost will be at least N$ 127 per day per person.
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When we carry out a chi-square test of independence, the expected frequencies are based upon the Null hypothesis - true or false.
Heights are sampled of kids from three schools. Using a 0.05 significance level, if when looking at ANOVA results, your p-value is 0.04, what can you say about your sample data? No minimum word count.
A probability value of .25 means that an event will occur:
Find the minimum sample size needed, using a prior study that found that 19% of computers needed repairs or had problems by the time the product was three years old.
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