Thirty-five percent of US adults have little confidence in their cars. You randomly select ten US adults. Find the probability that the number of US adults who have little confidence in their cars is (1) exactly six and then find the probability that it is (2) more than 7. (1) 0.069 (2) 0.974 (1) 0.069 (2) 0.005 (1) 0.021 (2) 0.005 (1) 0.021 (2) 0.026 Say a business wants to know if each salesperson is equally likely to make a sale. The company chooses 5 salespeople and gathers information on their sales experiences. What assumption must be made for this […]
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An industrial researcher is a consultant to a large chain of bookstores.
An industrial researcher is a consultant to a large chain of bookstores. Industry reports show that for book stores in general, the average number of complaints received by management for a 1-month period at this time of year is 6.5 (the variance is not known). Seven of this chain’s stores are randomly selected to keep records of complaints received over a 1-month period. The numbers of complaints are 4, 8, 9, 0, 3, 5, and 6. Does this chain get a different amount of complaints than book stores in general? (Use the .05 level). (a) Define variable of interest and […]
Question 1 Let x represent the number of pets in pet stores. This would be considered what type of variable:
Question 1 Let x represent the number of pets in pet stores. This would be considered what type of variable: Nonsensical Continuous Lagging Discrete Question 2 Let x represent the number of players on a sports field. This would be considered what type of variable: Discrete Continuous Distributed Inferential Question 3 Consider the following table. Age GroupFrequency18-29983130-39784540-49686950-59632360-69541070 and over5279 If you created the probability distribution for these data, what would be the probability of 30-39? 18.9% 42.5% 16.5% 23.7% Question 4 Consider the following table. Weekly hours workedProbability1-30 (average=23)0.0831-40 (average=36)0.1641-50 (average=43)0.7251 and over (average=54)0.04 Find the mean of this variable. […]
A professor finds that the scores on a History exam are known to be normally distributed with mean and standard deviation of 55 and 15, respectively….
A professor finds that the scores on a History exam are known to be normally distributed with mean and standard deviation of 55 and 15, respectively. Determine the passing score if 95% of the students are to clear the course.
The purpose of this study was to investigate the correlation and probable predictive relationship between self-determination skills taught by special…
The purpose of this study was to investigate the correlation and probable predictive relationship between self-determination skills taught by special education teachers and the academic performance of students with disabilities from junior high schools in Taiwan. The subjects included teachers from resource rooms and self-contained classrooms (n = 106) and students with disabilities in these classes (n = 106). Two measures, the Teaching Self-determination Scale (TSDS) and the Basic Learning Competency Assessment (BLCA), were used to collect data. The Pearson correlation, bivariate linear regression and stepwise multiple regression analyses were used to assess the correlation and predictive relationship between the […]
