Scribd
Upload
82 views1 page

H0: μd = 0 versus H1: μd ≠ 0 - Correct?

Noodles & Company conducted taste tests of two spaghetti sauces to determine which would be added to their menu. Thirty tasters rated their satisfaction with each sauce on a scale of 1-10. The mean difference in ratings between the sauces was -0.28 with a standard deviation of 2.565. A two-tailed t-test was conducted and resulted in a t-value of -0.601, which is not significant at the 0.05 level since the critical value is +/- 2.045. The p-value was 0.553.

Uploaded by

mobinil1
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
82 views1 page

H0: μd = 0 versus H1: μd ≠ 0 - Correct?

Noodles & Company conducted taste tests of two spaghetti sauces to determine which would be added to their menu. Thirty tasters rated their satisfaction with each sauce on a scale of 1-10. The mean difference in ratings between the sauces was -0.28 with a standard deviation of 2.565. A two-tailed t-test was conducted and resulted in a t-value of -0.601, which is not significant at the 0.05 level since the critical value is +/- 2.045. The p-value was 0.553.

Uploaded by

mobinil1
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 1

In 2009 Noodles & Company introduced spaghetti and meatballs to its menu.

Before putting it
on the menu, it performed taste tests to determine the best-tasting spaghetti sauce. In a paired
comparison, 30 tasters were asked to rate their satisfaction with two different sauces on a scale of
1–10, with 10 being the highest. Assume equal population
variances. The mean difference in ratings was = -0.28129 with a standard deviation of sd =
2.56540. Use α = 0.05. 

(a) Choose the appropriate hypotheses for a two-tailed test. Assume μd is the average difference
in the taste of the
two sauces.

H0: μd ≥ 0 versus H1: μd < 0 

H0: μd = 0 versus H1: μd ≠ 0 - Correct?

H0: μd ≤ 0 versus H1: μd > 0

(b) Find the test statistic tcalc. (Round your answer to 3 decimal places. A negative value should
be indicated by a minus sign.)

tcalc. -0.601

(c) Find the critical value tcrit for α = .05. (Round your answer to 3 decimal places.)

tcrit. +/- 2.045

(d) Find the p-value. (Round your answer to 3 decimal places.)

p-value. 0.553

You might also like