Concept explainers
A college admissions officer sampled 108 entering freshman and found that 34 of them scored less than 600 on the math SAT
a) find a point estimate for the proportion of all entering freshman at this college who scored less than 600 on the math SAT. Round your answer to at least three decimal places.
The point estimate for the proportion of all entering freshman at this college who scored less than 600 on the math SAT is:
2. Working at home: according to the us bureau 33% of men who worked at home were college graduates. In a sample of 474 women who worked at home, 155 were college graduates.
2) find a point estimate for the proportion of college graduates among women who work at home. Round your answer to at least three decimal places.
a) the point estimate for the proportion of college graduates among women who work at home is:
Trending nowThis is a popular solution!
Step by stepSolved in 2 steps with 1 images
- A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 90% confident that his estimate is in error by no more than five percentage points? Complete parts (a) through (c) below. a) Assume that nothing is known about the percentage of computers with new operating systems. n=0 (Round up to the nearest integer.) b) Assume that a recent survey suggests that about 95% of computers use a new operating system. n=0 (Round up to the nearest integer.) c) Does the additional survey information from part (b) have much of an effect on the sample size that is required? O A. No, using the additional survey information from part (b) does not change the sample size. O B. No, using the additional survey information from part (b) only slightly increases the sample size. OC. Yes, using the additional survey information from…arrow_forwardFind the indicated measure.The test scores of 21 students are listed below. Find Q3. 56 57 59 63 65 66 69 70 71 74 75 77 78 79 80 82 83 86 92 95 99 82.5 69.5 24 75arrow_forwardStatistics Questionarrow_forward
- Customers arrive at a rate of 40 per hour. You can process 50 customers per hour. a. What percentage of the time are you busy? b. What is the average number of customers in the system? c. What is the average time that a customer spends in the system (in minutes)?arrow_forwardDetermine the question (X) that converts eachsituation to Yes/No data.a) The proportion of cars that are silver.b) Voter percentage who favor candidate Jones.c) The proportion of defective itemsarrow_forwardA researcher wants to determine the percentage of American teenagers who send or receive text messages while doing homework. Which of the following techniques would likely be the MOST efficient way of obtaining an accurate estimate for this percentage? 1. Randomly select teenagers from the list of all teenage students in every state in America and mail surveys to those teens, asking them if they send or receive text messages while doing homework. 2. Send a survey to every teenager in America and ask them if they send or receive text messages while doing homework. 3. Randomly select teenagers from the list of all teenage students in one state and mail surveys to those teens, asking them if they send or receive text messages while doing homework.arrow_forward
- C6. How many hours per week do you spend on e-mail? Data are presented here for a GSS sample of 99 men and women, who each reported the number of hours they spent per week on e-mail. a. Compute the cumulative frequency and cumulative percentage distribution for the data. b. What proportion of the sample spent 3 hours or less per week on e-mail? C. What proportion of the sample spent 6 or more hours per week on e-mail? d. Construct a graph that best displays these data. Explain why the graph you selected is appropriate for these data. E-mail Hours per Week Frequency 19 20 1 13 2 2 4 6. 6. 2 8. 1 6. 23 10 or more 7.arrow_forwardIn planing for his children to go back to school Susan buys several items at a discount. Five items at $1.29 each, three at $1.49 each, six at $1.79 each and nine at $0.99 each. What was the median cost of all items? $1.48 Oa. Ob. O b. $1.99 c. Oc. $1.33 O d. $1.39 $1.29 O e.arrow_forwardplease solvearrow_forward
- MATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons IncProbability and Statistics for Engineering and th...StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage LearningStatistics for The Behavioral Sciences (MindTap C...StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage Learning
- Elementary Statistics: Picturing the World (7th E...StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSONThe Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. FreemanIntroduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. Freeman