(2 points each) In statistical inference, one uses sample statistics to estimate
ID: 3324399 • Letter: #
Question
(2 points each) In statistical inference, one uses sample statistics to estimate population parameters 1. TRUE FALSE In a simple random sample, you will need to make sure that every sample of size n has the same chance of being selected. 2. TRUE FALSE 3. The median is the same thing as the 50th percentile TRUE FALSE When applying Chebyshev's inequality, a key assumption is that the population from which you obtain your sample has a bell-shaped distribution. 4. TRUE FALSE 5. The empirical rule states that approximately 68 percent of the data values will lie within plus or minus two standard deviations of the mean TRUE FALSE 6. Values of the uniform random variable tend to be concentrated about the mean. TRUE FALSE 7. The t distribution is often referred to as the small-sample distribution of the sample mean. TRUE FALSE When hypothesis tests yield large p-values, the null should generally be rejected 8. TRUE FALSE Each trial of a binomial experiment has two mutually exclusive possible outcomes. 9. TRUE FALSE 10. A r andom variable is a function that assigns a numerical value to each outcome of an experiment. The z score for the standard normal curve can never be negative. A negative or inverse TRUE FALSE TRUE FALSE when one relationship between two variables occurs 12. variable increases as the other variable decreases. TRUE FALSE he coefficient of correlation measures the strength of the linear relationship that exists between two variables. 13. T TRUE FALSEExplanation / Answer
1. Yes , True Statement. Sample Statistics used to estimate Population Parameters
2. Yes , True Statement.
3. Yes , True Statement. Median is same as 50th percentile
4. False Statement. It is Valid for any distribution
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