If we wanted to reduce the standard error of the sample mean by half, we would need a sample size of about()
A: 184
B: 46
C: 92
D: 50
Part 4 - Retail Sales
A retailer randomly sampled 38 shoppers on “Black Friday”
(the day after Thanksgiving – the largest retail shopping day
of the year in the
E: ), and surveyed them about their shopping
habits, including time spent. The sample mean was reported as 5.58
hours, with a sample variance of 7.59.
A: 184
B: 46
C: 92
D: 50
Part 4 - Retail Sales
A retailer randomly sampled 38 shoppers on “Black Friday”
(the day after Thanksgiving – the largest retail shopping day
of the year in the
E: ), and surveyed them about their shopping
habits, including time spent. The sample mean was reported as 5.58
hours, with a sample variance of 7.59.
举一反三
- Counter<br/>sample can also be called _____________.() A: duplicate<br/>sample B: sealed<br/>sample C: confirmed<br/>sample D: contracted<br/>sample
- The<br/>process which requires the calculation of an interval and then<br/>selects the items based on the size of the interval is ( <br/>) A: statistical<br/>sampling. B: random<br/>sample selection. C: systematic<br/>sample selection. D: computerized<br/>sample selection.
- The<br/>methods used for evidence collection will vary depending on?() A: the<br/>environmental condition B: Laboratory<br/>condition C: the<br/>entirety of sample D: the<br/>type of sample
- A<br/>sample in which the characteristics of the sample are the same as<br/>those of the population is a ( ) A: variables<br/>sample. B: representative<br/>sample. C: attributes<br/>sample. D: random<br/>sample.
- —What about going by coach? It’s cheap and comfortable.[br][/br] —If we went that way, it would mean ______ more time than going by train. A: to spend B: spending C: spent D: eing spent