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STA1010 - Statistical methods for science - S2 2025
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A magazine printed a survey in its monthly issue and asked readers to fill it out and send it in. Over 1000 readers did so. This type of sample is called
The purpose of having a control group in a study is
When the method for selecting subjects produces a sample that does not represent the population of interest, the problem is called
Shoe sizes for females range from Size 5 to Size 13 with the average shoe size being between Sizes 8 and 9.
A student uses a random number from 5 to 13 to simulate the shoe sizes of a population of females.
Which of the following statements is the most appropriate evaluation of this simulation?
A study was conducted to compare the graded results of male and female students majoring in Psychology.
In this study:
At a college there are 120 students in Year 9, 90 in year 10, 110 in year 11, and 80 in year 12. A school administrator selects a random sample of 12 of the Year 9, a random sample of 9 of the year 10, a random sample of 11 of the Year 11, and a random sample of 8 of the Year 12. She then interviews all the students selected.
Identify the type of sampling used in this example.
Determine whether the given study is an observational study or an experiment.In a clinical trial, 780 participants suffering from high blood pressure were randomly assigned to one of three groups. Over a one-month period, the first group received the experimental drug, the second group received a placebo, and the third group received no treatment. The diastolic blood pressure of each participant was measured at the beginning and at the end of the period and the change in blood pressure was recorded. The average change in blood pressure was calculated for each of the three groups and the three averages were compared.