If two variables show a positive linear relationship in a scatter diagram:
A) most of the data values will plot in the lower left-hand quadrant.
B) most of the data values will plot in the lower left-hand and upper right-hand quadrants.
C) most of the data values will cluster close to the x and y axes.
D) the data will cluster in the center of the graph.
Q. 2If the null hypothesis that all population means are equal is rejected by the analysis of variance F-test, the alternative hypothesis that all population means differ is concluded to be true.
Indicate whether the statement is true or false
Q. 3When someone has been accused of a crime the null hypothesis is:H0 : innocent.In this case, a Type I error would be convicting an innocent person.
Indicate whether the statement is true or false
Q. 4A report recently published in a major business periodical stated that the average salary for female managers is less than 50,000.
If we were interested in testing this, the following null and alternative hypotheses would be established:H0 : 50,000H : < 50,000 Indicate whether the statement is true or false
Q. 5One of the advantages that a stem and leaf diagram has over a histogram is:
A) the detail of the data is preserved.
B) it shows the general distribution of a quantitative variable.
C) it can be used with nominal data.
D) There are no advantages.
Q. 6According to the local real estate board, the average number of days that homes stay on the market before selling is 78.4 with a standard deviation equal to 11 days.
A prospective seller selected a random sample of 36 homes from the multiple listing service. Above what value for the sample mean should 95 percent of all possible sample means fall?A) About 79.3 days
B) About 64 days
C) Approximately 75.4 days
D) Can't be determined without knowing whether the population is normally distributed.
Q. 7A probability distribution with an expected value greater than the expected value of a second probability distribution will also have a higher standard deviation.
Indicate whether the statement is true or false
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