Exam 12: Analysis & Interpretation: Individual Variables Independently

Which of the following statements concerning the sample standard deviation is FALSE?

An observation so different in magnitude from the rest of the observations that the analyst chooses to treat it as a special case is called a(n) ____________________.

A clothing manufacturer traditionally makes sweatshirts from three different fabrics, A, B and C. Over the years the percentages sold of each fabric are 50, 35, and 15, respectively. Recently, the manufacturer began producing running suits from the same three fabrics. During the first three months of production, the company received orders for 6,500 suits made from fabric A, 3,400 from fabric B, and 2,700 from fabric C. -Refer to Exhibit 12.4. What is the value of the test statistic useful for determining how well the pattern of sales (by fabric type) of the new running suit corresponds to the expected pattern?

A researcher is interested in analyzing a set of nominal data to determine if the observed pattern of frequencies corresponds to the expected pattern. The appropriate statistical technique is:

A statistical test to determine whether some observed pattern of frequencies corresponds to an expected pattern is called a chi-square goodness-of-fit test.

You can "prove" that the alternative hypothesis is true if the null hypothesis is rejected.

Use the information below to answer the questions. A major car manufacturer was interested in whether its midsize car was selling consistently in two markets with respect to the annual income of the car purchasers. 500 new car buyers in Chicago and Miami were surveyed. In Chicago the following pattern was observed: Among those surveyed in Miami, 20 earned under $20,000; 70 earned between $20,000 and $30,000; 265 earned between $30,000 and $40,000; 125 earned between $40,000 and $50,000; and 20 earned more than $50,000. -Refer to Exhibit 12.3. The chi-square test was used to check whether Miami sales among income groups were consistent with Chicago's. The appropriate degrees of freedom for the chi-square test would be:

A researcher had calculated the sample chi-square test statistic to be equal to x²= 7.71. For an alpha level of 0.10 and 4 degrees of freedom, the critical value of the chi-square statistic is 7.78. The appropriate conclusion is that the

In estimating the standard deviation in the population for the formula for calculating the sample size for estimating a mean, we can use some prior knowledge about the:

The ____________________ is a statistical test to determine whether some observed pattern of frequencies corresponds to and expected pattern.

To calculate sampling error for a proportion, which of the following pieces of information is NOT needed?

Which of the following is FALSE about the use of percentages when reporting results?

Suppose that a random sample of 550 new car owners found that 38 percent of them were aware of a particular brand of tires that your company sells. If you are willing to accept less than a 5 percent chance of error that the true awareness rate of your company's brand of tire across all new car owners is less than 0.45, which statistical technique should you use from this data?

The logic of hypothesis testing is that if we assume that the hypothesized value is the population parameter, then, at the 95% level of confidence, if we took 100 separate samples, the z-value for 95 of those samples would fall between + or - 1.96.

-Refer to Exhibit 12.1. The median income in the above figure is

Which types of measurement are used to group respondents or objects into groups or categories and are thus referred to as categorical measures?

The hypothesis that a proposed result is not true for the population is called the ____________________ hypothesis.

-Refer to Exhibit 12.1. $50,000 represents the ____ in the figure above.

Which of the following is TRUE about hypothesis testing?

Which of the following would NOT be an example of a situation involving univariate analysis?