A multinomial experiment consists of n identical independent trials.
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Q. 2If a regression line has a y-intercept of 6.75 and a slope of 1.25, then when x = 2 the actual value of y is:
a. 9.25
b. 8.75
c. 2.25
d. 1.45
e. unknown
Q. 3In the multinomial experiment we have (r -1) times (c -1) degrees of freedom, where r is the number of rows, and c is the number of columns.
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Q. 4Given the least squares regression line y = 3.8 2x,
a. the relationship between x and y is positive
b. the relationship between x and y is negative
c. there is no linear relationship between x and y
d. as x decreases, so does y
e. as x increases, so does y
Q. 5The expected frequency in a chi-square test of a multinomial experiment is found by multiplying the hypothesized probability of a cell by the number of pieces of data in the sample.
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Q. 6Generally speaking, if two variables are unrelated (as one increases, the other shows no pattern), the covariance will be:
a. a large positive number
b. a large negative number
c. a positive or negative number close to zero
d. a positive or negative number close to 100
e. none of these
Q. 7When using the chi-square distribution in a hypothesis test for a multinomial experiment, the number of degrees of freedom is the number of cells.
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Q. 8Which of the following are measures of the linear relationship between two variables?
a. the covariance
b. the correlation coefficient
c. the variance
d. both the covariance and the correlation coefficient
e. both the correlation coefficient and the variance
Q. 9A hypothesis test involving a multinomial experiment is always a left-tail test.
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