Calculate the test statistic. t-0 (Round to three decimal places as needed.)

Algebra for College Students
10th Edition
ISBN:9781285195780
Author:Jerome E. Kaufmann, Karen L. Schwitters
Publisher:Jerome E. Kaufmann, Karen L. Schwitters
Chapter11: Systems Of Equations
Section11.CT: Test
Problem 24CT
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Please show how to find the test statistic.

Josh ran an experiment to test optimum power and time settings for microwave popcorn. His goal was to deliver popcorn with fewer than 11% of the kernels left unpopped, on average. He determined that power 9 at 4 minutes was the best
combination. Complete parts a) and b) below.
a) He concluded that this popping method achieved the goal of fewer than 11% of the kernels left unpopped. If it really does not work that well, what kind of error did Josh make?
Type Il error
Type I error
b) To be sure that the method was successful, he popped 8 more bags of popcorn (selected at random) at this setting. All were of high quality, with the percentages of unpopped kernels shown below.
12.4, 2.9, 8.6, 8.1, 13.4, 3.2, 2.7, 9.5 O
Does this provide evidence that he met his goal of an average of fewer than 11% unpopped kernels? Assume a = 0.05.
Choose the correct null and alternative hypotheses.
A. Ho μ= 11
HA: µ<11
B. H μή11
HA: H=11
Ho: H = 11
HẠ: µ#11
D. H: μ= 11
HA: µ> 11
O F. Ho: µ> 11
HA: H= 11
Е. Но: <11
HẠ: µ= 11
%3D
Calculate the test statistic.
t=
(Round to three decimal places as needed.)
Transcribed Image Text:Josh ran an experiment to test optimum power and time settings for microwave popcorn. His goal was to deliver popcorn with fewer than 11% of the kernels left unpopped, on average. He determined that power 9 at 4 minutes was the best combination. Complete parts a) and b) below. a) He concluded that this popping method achieved the goal of fewer than 11% of the kernels left unpopped. If it really does not work that well, what kind of error did Josh make? Type Il error Type I error b) To be sure that the method was successful, he popped 8 more bags of popcorn (selected at random) at this setting. All were of high quality, with the percentages of unpopped kernels shown below. 12.4, 2.9, 8.6, 8.1, 13.4, 3.2, 2.7, 9.5 O Does this provide evidence that he met his goal of an average of fewer than 11% unpopped kernels? Assume a = 0.05. Choose the correct null and alternative hypotheses. A. Ho μ= 11 HA: µ<11 B. H μή11 HA: H=11 Ho: H = 11 HẠ: µ#11 D. H: μ= 11 HA: µ> 11 O F. Ho: µ> 11 HA: H= 11 Е. Но: <11 HẠ: µ= 11 %3D Calculate the test statistic. t= (Round to three decimal places as needed.)
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