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Assume that the distribution of score is normal with the mean and SD given. what are the first and third Q of the distribution and compare it to the actual value of Q1: 420 and Q3: 570. Dose this give any evidence that the distribution is not normal?
the compressive strength of samples of cement can be modeled by a normal distribution with a mean of 6000 kilograms per
Suppose that the grams of fat have a normal distribution and form 90%, 95%, and 99% confidence intervals for the mean grams of fat. Based on this data, can we say that the labeling on the package is misleading?
If the scores are approximately normal with mean 544 and standard deviation 103, what minimum score would a student need in order to score in the top 10% of those taking the test?
To compare the effectiveness of two treatments 1 and 2 for a particular disease. Patients were separated in 2 treatment groups. A patient in group 1 received treatment 1 and patients in group 2 received treatment 2.
questions1. compare and contrast internal and external validity. describe and give examples of research questions for
1.a market research company wishes to find out whether the population of students at a university prefers brand a or
An averages of four tax evaders per 100 tax filers. If 50 tax filers are randomly selected from the state, what is the probability of the following:
question in a survey of a group of 60 families it is found that 38 families own a dog 45 own a cat and 26 own both a
An elementary school principal would like to know how many hours the students spend watching TV each day. A sample of n = 25 children is selected, and a survey is sent to each child's parents.
question the monthly sales of mufflers follow the normal distribution with a mean of 1200 and a standard deviation of
the citizens of a certain community were asked to choose their favorite pet. the pie chart below shows the distribution
The test question was if this difference between the test statistics and the stated life of the battery was significant? The .05 significant level was selected for the test. Which is the correct statement?
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