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Watch Corporation of Switzerland claims that its watches on average will neither gain nor lose time...

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Verified Solution

Question

Basic Math

Watch Corporation of Switzerland claims that its watches onaverage will neither gain nor lose time during a week. A sample of18 watches provided the following gains (+) or losses (–) inseconds per week.

Excel Data File

watches
-0.30
-0.27
-0.34
-0.25
0.31
-0.20
0.36
0.24
-0.19
-0.40
-0.49
-0.55
-0.55
-0.67
-0.03
-0.23
-0.54
0.08

–0.30

–0.27

–0.34

–0.25

+0.31

–0.20

+0.36

+0.24

–0.19

–0.40

–0.49

–0.55

–0.55

–0.67

–0.03

–0.23

–0.54

+0.08

a-1.

Is it reasonable to conclude that the mean gain or loss in timefor the watches is 0? Use the .02 significance level. At a level of.02 significance, we reject H0: ? = 0if t < or t > . (Negative amountsshould be indicated by a minus sign. Round your answers to 3decimal places.)

a-2.The value of the test statistic is  . (Negativeamount should be indicated by a minus sign. Round your answer to 3decimal places.)
a-3.(Click to select)  Reject  Do notreject  H0: ? = 0. Thep-value is  (Click to select)  greaterthan 0.20  between 0.0005 and 0.001  less than0.001  between 0.001 and 0.01

Answer & Explanation Solved by verified expert
4.3 Ratings (743 Votes)
let X be the random variable denoting the gains or losses in seconds per weekFollow this table for the    See Answer
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