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The State Education Department requires local school districts to keep these records on all students: age, race or ethnicity, days absent, current grade level, standardized test scores in reading and mathematics, and any disabilities or special educational needs the student may have.
Which of the following are categorical (or qualitative) variables in these records? Select all correct answers.
1. Reading Test Score
2. Race or Ethnicity
3. Disabilities or Special Needs
4. Age
5. Mathematics Test Score
6. Days Absent
7. Current Grade Level
General scores on academic performance in english language using 60 participant. let the highest score be 90 and 10. use a class inertval of 10 create your class interval and frequency and use the information to answer.
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Find the evaluation score confidence intervals for the following two departments: Department 1 and Department 4 combined. Find the confidence interval at the 95% level. Use s = 6.06 and the mean 17.625.
a pharmaceutical company is checking their medicines according to the regulations imposed. the company must ensure that
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Assume that a random variable, x, is distributed according to a normal distribution with mean 12 and standard deviation 2. Find the z-value if:
a company studied the number of lost-time accidents occurring at its brownsville texas plant. historical records show
What is the probability that the mean life-span of a sample of 64 randomly selected bulbs will exceed 727 hours?
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