# Hour was 77 seconds suppose that you want to test the

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Chapter 13 / Exercise 4
Nature of Mathematics
Smith
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hour was 7.7 seconds. Suppose that you want to test the claim that the average time to accelerate from 0 to 60 miles per hour is longer than 7.7 seconds. What would you use for the alternative hypothesis? A.H1: f\$mu f\$ = 7.7 seconds B.H1: f\$mu geq f\$ 7.7 seconds Correct C.H1: f\$mu f\$ > 7.7 seconds D.H1: f\$mu f\$ < 7.7 seconds Answer Key: C Question 8 of 20 1.0/ 1.0 Points The hypothesis that an analyst is trying to prove is called the: A.quality of the researcher B.level of significance C.elective hypothesis Correct D.alternative hypothesis Answer Key: D Question 9 of 20 1.0/ 1.0 Points Results from previous studies showed 79% of all high school seniors from a certain city plan to attend college after graduation. A random sample of 200 high school seniors from this city reveals that 162 plan to attend college. Does this indicate that the percentage has increased from that of previous studies? Test at the 5% level of significance. What is the p-value associated with your test of hypothesis? A.0.6874 B.0.7563 Correct C.0.2437 D.0.4874 Answer Key: C Question 10 of 20 1.0/ 1.0 Points A severe storm has an average peak wave height of 16.4 feet for waves
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Chapter 13 / Exercise 4
Nature of Mathematics
Smith
Expert Verified
hitting the shore. Suppose that a storm is in progress with a severe storm class rating. Let us say that we want to set up a statistical test to see if the wave action (i.e., height) is dying down or getting worse. If you wanted to test the hypothesis that the waves are dying down, what would you use for the alternate hypothesis? Is the P-value area on the left, right, or on both sides of the mean? A.H1: f\$mu f\$ is not equal to 16.4 feet; the P-value area is on the right of the mean B.H1: f\$mu f\$ is greater than 16.4 feet; the P-value area is on the left of the mean Correct C.H1: f\$mu f\$ is less than 16.4 feet; the P-value area is on the left of the mean D.H1: f\$mu f\$ is greater than 16.4 feet; the P-value area is on both sides of the mean Answer Key: C Question 11 of 20 1.0/ 1.0 Points A two-tailed test is one where: A.negative sample means lead to rejection of the null hypothesis Correct B.results in either of two directions can lead to rejection of the null hypothesis C.no results lead to the rejection of the null hypothesis D.results in only one direction can lead to rejection of the null hypothesis Answer Key: B Part 2 of 3 - 3.0/ 6.0 Points Question 12 of 20 1.0/ 1.0 Points Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. A medical doctor wishes to test the claim that the standard deviation of the systolic blood pressure of deep sea divers is less than 450. To do so, she selected a random sample of 20 divers and found s = 432.
Assuming that the systolic blood pressures of deep sea divers are normally distributed, if the doctor wanted to test her research hypothesis at the .01 level of significance, what is the critical value?