Part 1 of 4 Victoria, an accomplished marathon runner, claims that the standard deviation for her time to run a 26.2 mile marathon is less than 17.5 minutes. To test her claim, Victoria looks up 11 of her race times (in minutes): 227.2, 233.3, 259.7, 265.8, 252.1, 228.8, 222.6, 202.9, 214.5, 237.2, 267.7 Perform a hypothesis test using a 9% level of significance to test Victoria's claim. Step 1: State the null and alternative hypotheses. Ho:0 2 17.5 Ha:o

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Part 1 of 4
Victoria, an accomplished marathon runner, claims that the standard deviation for her time to run a
26.2 mile marathon is less than 17.5 minutes. To test her claim, Victoria looks up 11 of her race
times (in minutes):
227.2, 233.3, 259.7, 265.8, 252.1, 228.8, 222.6, 202.9, 214.5, 237.2, 267.7
Perform a hypothesis test using a 9% level of significance to test Victoria's claim.
Step 1: State the null and alternative hypotheses.
17.5
Ha:0 <v
17.5
test.) *
(So we will be performing a left-tailed
Part 2 of 4
Step 2: Assuming the nullI hypothesis is true, determine the features of the distribution of
test statistics.
Because we are testing the population standard deviation, we will use a x
x degrees of freedom.
distribution with .9
Question Help: D Post to forum
Transcribed Image Text:Part 1 of 4 Victoria, an accomplished marathon runner, claims that the standard deviation for her time to run a 26.2 mile marathon is less than 17.5 minutes. To test her claim, Victoria looks up 11 of her race times (in minutes): 227.2, 233.3, 259.7, 265.8, 252.1, 228.8, 222.6, 202.9, 214.5, 237.2, 267.7 Perform a hypothesis test using a 9% level of significance to test Victoria's claim. Step 1: State the null and alternative hypotheses. 17.5 Ha:0 <v 17.5 test.) * (So we will be performing a left-tailed Part 2 of 4 Step 2: Assuming the nullI hypothesis is true, determine the features of the distribution of test statistics. Because we are testing the population standard deviation, we will use a x x degrees of freedom. distribution with .9 Question Help: D Post to forum
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