A customer buys $17.01 in gas and request one $5 lottery ticket to $1 lottery ticket and won $3 lottery ticket he gives you two
1 answer:
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Answer:
Step-by-step explanation:
Data given and notation
represent the sampe size for A
represent the sample size for B
represent the sample deviation for A
represent the sample deviation for B
represent the significance level provided
F test is a statistical test that uses a F Statistic to compare two population variances, with the sample deviations s1 and s2. The F statistic is always positive number since the variance it's always higher than 0. The statistic is given by:
Solution to the problem
System of hypothesis
We want to test if we have the same variation, so the system of hypothesis are:
H0:
H1:
Calculate the statistic
Now we can calculate the statistic like this:
A standard trick for finding the rational form of a repeated decimal:
Multiply by an appropriate power of 10 to move one "cycle" of the repeated pattern to the left side of the decimal point:
Now subtract
from this number and we lose the fractional part:
And from here you can solve for.
Multiply by an appropriate power of 10 to move one "cycle" of the repeated pattern to the left side of the decimal point:
Now subtract
And from here you can solve for