Mathematics, 18.04.2020 02:46 jakeSanT5737
Gillette claims that their double-edge shaver is better than the leading brand of single-edge shavers (Lady Bic). In a recent study, 26 women rated the Gillette and the Lady Bic shavers on smoothness, closeness and safety. One group of women were used and each woman recorded two scores. The mean difference of those scores were tested with the following results.
Critical Value…………… t = 1.645
Test statistic t = 1.978
P-value = 0.031
Significance level …… = 0.05
The study design is:
a. pre-test/posttest
b. one-sample dependent mean
c. two-sample mean
What numbers are being compared in the test?
a. average difference and zero
b. means
c. standard deviations
d. critical values
Which number from the computer output is compared to the significance level to check if the null hypothesis should be rejected?
a. degrees of freedom
b. test statistic
c. P-value
d. critical value
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Gillette claims that their double-edge shaver is better than the leading brand of single-edge shaver...
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