\#8. Data were collected on the amount spent by 49 customers for lunch at a restaurant. The
sample mean is $23.12. The sample standard deviation is known with $7.1197. (1). At 99%
confidence, what is the margin of error? (4 points) (2). Develop an 80% confidence interval
estimate of the mean amount spent for lunch. (4 points) (3). When the sample size is taken from
64 to 30 , which of the following statements is true? [Multiple Choice]. (4 points) (A). Margin of
error can not be computed. (B). Margin of error becomes smaller. (C). Margin of error becomes
larger. (D). Margin of error is unchanged. (E). Margin of error may become larger or smaller.
(F). None of the answers is correct..
Measures of Dispersion and Variability: Range, QD, AD and SD
#8. Data were collected on the amount spent by 49 customers for lunc.pdf
1. #8. Data were collected on the amount spent by 49 customers for lunch at a restaurant. The
sample mean is $23.12. The sample standard deviation is known with $7.1197. (1). At 99%
confidence, what is the margin of error? (4 points) (2). Develop an 80% confidence interval
estimate of the mean amount spent for lunch. (4 points) (3). When the sample size is taken from
64 to 30 , which of the following statements is true? [Multiple Choice]. (4 points) (A). Margin of
error can not be computed. (B). Margin of error becomes smaller. (C). Margin of error becomes
larger. (D). Margin of error is unchanged. (E). Margin of error may become larger or smaller.
(F). None of the answers is correct.
![#8. Data were collected on the amount spent by 49 customers for lunch at a restaurant. The
sample mean is $23.12. The sample standard deviation is known with $7.1197. (1). At 99%
confidence, what is the margin of error? (4 points) (2). Develop an 80% confidence interval
estimate of the mean amount spent for lunch. (4 points) (3). When the sample size is taken from
64 to 30 , which of the following statements is true? [Multiple Choice]. (4 points) (A). Margin of
error can not be computed. (B). Margin of error becomes smaller. (C). Margin of error becomes
larger. (D). Margin of error is unchanged. (E). Margin of error may become larger or smaller.
(F). None of the answers is correct.](https://image.slidesharecdn.com/8-230328094512-29d44419/85/8-Data-were-collected-on-the-amount-spent-by-49-customers-for-lunc-pdf-1-320.jpg)
