For the standard normal probability distribution, the area to the left of the mean is _____.
Answer: .5
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Business Statistics
- An important application of the chi-square distribution is _____.
- In hypothesis testing, the critical value is _____.
- The error of rejecting a true null hypothesis is _____.
- The confidence associated with an interval estimate is called the _____.
- Whenever the population has a normal probability distribution, the sampling distribution of is a normal probability distribution for _____.
- Each customer entering a department store will either buy or not buy some merchandise. An experiment consists of following three customers and determining whether or not they purchase any merchandise. The number of sample points in this experiment is _____.
- Initial estimates of the probabilities of events are known as _____.
- The variance of a sample or a population cannot be _____.
- Categorical data can be graphically represented by using a(n) _____.
- A graphical method that can be used to show both the rank order and shape of a data set simultaneously is a _____.
- Which two scales of measurement can be either numeric or nonnumeric?
- In an application for a credit card, potential customers are asked for their social security numbers. A social security number is an example of a _____.
- The required condition for using an ANOVA procedure on data from several populations is that the _____.
- In an analysis of variance problem, if SST = 120 and SSTR = 80, then SSE is _____.
- A term that means the same as the term "variable" in an ANOVA procedure is _____.
- The independent variable of interest in an ANOVA procedure is called _____.
- A Type II error is committed when _____.
- In the past, 75% of the tourists who visited Chattanooga went to see Rock City. The management of Rock City recently undertook an extensive promotional campaign. They are interested in determining whether the promotional campaign actually INCREASED the proportion of tourists visiting Rock City. The correct set of hypotheses is _
- The probability of making a Type I error is denoted by ___
- If a hypothesis test has a Type I error probability of .05, that means if the null hypothesis is _____.
- In general, higher confidence levels provide _____.
- A 95% confidence interval for a population mean is determined to be 100 to 120. If the confidence coefficient is reduced to .90, the interval for μ _____.
- From a population that is normally distributed with an unknown standard deviation, a sample of 25 elements is selected. For the interval estimation of μ, the proper distribution to use is the _____.
- An estimate of a population parameter that provides an interval believed to contain the value of the parameter is known as the _____.
- We can reduce the margin of error in an interval estimate of p by doing any of the following EXCEPT _____.
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