A. There is sufficient evidence to support the claim that the mean is less than 32 miles per gallon. O B. There is not sufficient evidence to support the claim that the mean is less than 32 miles per gallon. O C. There is not sufficient evidence to support the claim that the mean is greater than 32 miles per gallon. O D. There is sufficient evidence to support the claim that the mean is greater than 32 miles per gallon.

15.) The mean wingspan for the population of a species of bird is known to be 30 inches, and the standard deviation for the wingspan of the population of the species of bird is known to be 4 inches. A researcher believes that the mean wingspan is actually less. He measures the wingspan of a sample of 10 birds, and finds that the mean wingspan of the birds in the sample is 28 inches. For a = 0.01 decide whether the mean wingspan is actually lower. a. State the null hypothesis and the alternative hypothesis. b. Is the test left-tailed, right-tailed, or two-tailed? c. Find the test statistic 0222 5) d. Find the critical value or p value f. Summarize the results 2 e. Should you reject the null hypothesis? 2091 0112 Bulevfabitino od bris Yazarifooyrt Hund belan buy luode b 20 Muzadi asosmmuz

a consumer advocacy group claims that the mileage for the Carter Motor Company's new sedan is less than 32 mpg, state the type II error for the test A. Fail to reject the claim that the mean is equal to 32 mi per gallon when it is actually greater than 32 miles per gallon.   B. reject the claim that the mean is equal to 32 mi per gallon when it is actually 32 mi per gallon.   C. Fail to reject the claim that the mean is less than 32 mi per gallon when it is actually 32 mi per gallon.   D. fail to reject the mean is equal to 32 mi per gallon when it is actually less than 32 mi per gallon.

Q.5) Find the mean absolute deviation for the set below. S= {65, 90, 85, 70, 70, 95, 55} A. В. C. D. 12.24 75.7 85.7 40

Determine whether the given value is a statistic or a parameter.   A survey found that 35% of all respondents voted in the past election. Choose the correct answer below.     A. The value is a parameter because it is a numerical measurement describing some characteristic of a sample.   B. The value is a parameter because it is a numerical measurement describing some characteristic of a population.   C. The value is a statistic because it is a numerical measurement describing some characteristic of a sample.   D. The value is a statistic because it is a numerical measurement describing some characteristic of a

f. The Z-scores of four students on an algebra test are given. If the mean of the test was 82 and the standard deviation was 8, find each students test grade. i. Elena's Z-score is –1.4 ii. Regina's Z-score is 1.5 iii. Ronnie's Z-score is 1 iv. Mario's Z-score is –2.5

___ are the required characteristics of a population that would allow researchers to draw a sample and make accurate inferences about the population with a chosen statistical analysis.   a. Scales of measurement   b. Parameters   c. Assumptions   d. Demographics

团 C. Determine whether the following statement is true or false. If it is false, rewrite it as a true statement. A sample statistic will not change from sample to sample. Choose the correct answer below. O A. The statement is false. A population statistic will not change from population to population. OB. The statement is true. O C. The statement is false. A sample parameter will not change from sample to sample. O D. The statement is false. A sample statistic can change from sample to sample. Type here to search 直0 +D F4 F5 F7 %23 1. 2. 3. 4. E 5. A SD 人 F.

A New York Times article titled For Runners, Soft Ground Can Be Hard on the Body considered two perspectives on whether runners should stick to hard surfaces or soft surfaces following an injury. One position supported running on soft surfaces to relieve joints that were in recovery from injury. The second position supported running on hard surfaces since soft surfaces can be uneven, which may make worse those injuries a soft surface was intended to help. Suppose we are given sufficient funds to run an experiment to study this topic. With no studies to support either position, which of the following hypotheses would be appropriate? The first position is more sensible, so this should be a one-sided test. In this case, we should form the alternative hypothesis around the second position. The second position makes the more sense, so this should be a one-sided test. In this case, we should form the alternative hypothesis around the first position. Because we would be interested in any…

11. For the mathematics part of the Scholastic Assessment Test (SAT), the mean is 514 with a standard deviation of 113, and for the mathematics part of the American College Testing (ACT), the mean is 27 with a standard deviation of 5.1. Fatema scores a 660 on SAT and a 20.6 on ACT. Determine on which test she performed better. A. ACT B. Cannot be determined. C. Performed equally on both tests a D. SAT E. Depends on the subject areas covered F. Need more information about other students' scores Hint: A higher z-score indicates performing better.