The average gasoline price of one of the major oil companies in Oman has been RO 1.25 per gallon. The company is not interested in increasing or decreasing the current prices of gasoline. A random sample of 49 of their gas stations is selected and the average price is determined to be RO 1.20 per gallon. Furthermore, assume that the standard deviation of the population is $0.21. Consider the hypothesis is stated as two-tailed test. The value of the test statistic for this hypothesis test is

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The average gasoline price of one of the major oil
companies in Oman has been RO 1.25 per gallon.
The company is not interested in increasing or
decreasing the current prices of gasoline. A
random sample of 49 of their gas stations is
selected and the average price is determined to
be RO 1.20 per gallon. Furthermore, assume that
the standard deviation of the population is $0.21.
Consider the hypothesis is stated as two-tailed
test. The value of the test statistic for this
hypothesis test is
Transcribed Image Text:The average gasoline price of one of the major oil companies in Oman has been RO 1.25 per gallon. The company is not interested in increasing or decreasing the current prices of gasoline. A random sample of 49 of their gas stations is selected and the average price is determined to be RO 1.20 per gallon. Furthermore, assume that the standard deviation of the population is $0.21. Consider the hypothesis is stated as two-tailed test. The value of the test statistic for this hypothesis test is
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