On a placement examination, Rick scored lower than 1228 of the 12,730 students who took the exam. Find the percentile, rounded to the nearest percent, for Rick's score

In 1997, in terms of population, county A ranked 9th out of 76 counties. What was its percentile rank? (Round your answer to the nearest whole number.) th percentile

The scores of 10 golfers were 73; 71; 78; 72; 67; 76; 67; 75; 73; 75. Calculate the range of the dataset.

A recent survey reports that 22% of students take the bus to campus. If 660 students commute to campusby bus, how many students participated in the study?

In a sample of 169 students, 16 said they have donated blood. What percent of the students have donated blood?

The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 33 who smoke. step 1 of 2: suppose a sample of 1267 Americans over 33 is drawn. Of these people, 913 don't smoke. Using the data, estimate the proportion of Americans over 33 who smoke. Enter your answer as a decimal number rounded to three decimal places.

An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars over domestic.   Suppose a sample of 1164 new car buyers is drawn. Of those sampled, 325 preferred foreign over domestic cars. Using the data, estimate the proportion of new car buyers who prefer foreign cars. Enter your answer as a fraction or a decimal number rounded to three decimal places.

In 2016 the Better Business Bureau settled 84% of complaints they received in the United States. Suppose you have been hired by the Better Business Bureau to investigate the complaints they received this year involving new car dealers. You plan to select a sample of new car dealer complaints to estimate the proportion of complaints the Better Business Bureau is able to settle. Assume the population proportion of complaints settled for new car dealers is 0.84, the same as the overall proportion of complaints settled in 2016. Use the z-table. a. Suppose you select a sample of 200 complaints involving new car dealers. Show the sampling distribution of p. E(p) (to 2 decimals) (to 4 decimals) b. Based upon a sample of 200 complaints, what is the probability that the sample proportion will be within 0.04 of the population proportion (to 4 decimals)? probability : = c. Suppose you select a sample of 460 complaints involving new car dealers. Show the sampling distribution of p. E(F) (to 2…

Prof. Leen wants to estimate the more than 92% percent of adults living in a large city have cell phones. Prof. Leen randomly selects 160 adult residents to determine whether they have cell phones. Of the 160 people sampled, 155 own cell phones. Find the p-value for the test. (Round the answer to three decimal places.)

A software company is interested in improving customer satisfaction rate from the 51% currently claimed. The company sponsored a survey of 157 customers and found that 89 customers were satisfied.