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BUAL 2650 Gupta Exam 2 || with 100% Accurate Solutions.
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In testing for the equality of means from two independent populations, if the hypothesis of equal population means is rejected at α = .01, it will ________ be rejected at α = .05 a. always b. sometimes c. never correct answers a. always A new company is in the process of evaluating its cu...

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  • August 6, 2024
  • 10
  • 2024/2025
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  • in testing for the equality of means from two inde

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BUAL 2650 Gupta Exam 2 || with 100% Accurate Solutions.
In testing for the equality of means from two independent populations, if the hypothesis of equal
population means is rejected at α = .01, it will ________ be rejected at α = .05

a. always
b. sometimes
c. never correct answers a. always

A new company is in the process of evaluating its customer service. The company offers two
types of sales: (1) Internet sales and (2) store sales. The marketing research manager believes
that the Internet sales are more than 10 percent higher than store sales. The null hypothesis
would be

a. PInternet − Pstore > .10
b. PInternet − Pstore < .10
c. PInternet − Pstore ≥ .10
d. PInternet − Pstore ≤ .10
e. PInternet − Pstore = .10 correct answers d. PInternet − Pstore ≤ .10

A new company is in the process of evaluating its customer service. The company offers two
types of sales: (1) Internet sales and (2) store sales. The marketing research manager believes
that the Internet sales are more than 10 percent higher than store sales. The alternative hypothesis
would be stated as

a. PInternet − Pstore > 0
b. PInternet − Pstore < 0
c. PInternet − Pstore ≥ .10
d. PInternet − Pstore ≤ .10
e. PInternet − Pstore > .10 correct answers e. PInternet − Pstore > .10

If we are testing the hypothesis about the mean of a population of paired differences with
samples of n1 = 10, n2 = 10, the degrees of freedom for the t statistic is ________.

a. 19
b. 18
c. 9
d. 8
e. 10 correct answers c. 9

The ________ measures the strength of the linear relationship between the dependent variable
and the independent variable.

a. correlation coefficient
b. distance value
c. Y-intercept

, d. residual correct answers a. correlation coefficient

The correlation coefficient may assume any value between

a. 0 and 1
b. −∞ and ∞
c. 0 and 8
d. −1 and 1
e. −1 and 0 correct answers d. −1 and 1

The following results were obtained as part of a simple regression analysis.
r2 = .9162F
statistic from the F table = 3.59
Calculated value of F from the ANOVA table = 81.87
α = .05
p-value = .000

The null hypothesis of no linear relationship between the dependent variable and the independent
variable

a. is rejected
b. cannot be tested with the given information
c. is not rejected
d. is not an appropriate null hypothesis for this situation. correct answers a. is rejected

The coefficient of determination measures the ________ explained by the simple linear
regression model.

a. correlation
b. proportion of variation
c. standard error
d. mean square error correct answers b. proportion of variation

The ________ of the simple linear regression model is the value of y when the mean value of x
is zero.

a. y-intercept
b. slope
c. independent variable
d. response variable correct answers a. y-intercept

In multiple regression analysis, the explained sum of squares divided by the total sum of squares
yields the __________.

a. standard error
b. F statistic

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