Question

1) A survey showed that 1200 of the 1600 adult respondents believe in global warming.

Construct a 95% confidence interval estimate of the proportion of adults believing in global warming and describe the confidence interval in everyday language.

2) A city built a new parking garage in a business district. For a random sample of 100 days, daily fees collected averaged $2,000, with a standard deviation of $500.

(a) Construct a 90% confidence interval estimate of the mean daily income this parking garage generates. Show all work. Just the answer, without supporting work, will receive no credit. Include description of how confidence interval was constructed.

(b) Describe the confidence interval in everyday language.

Answer 1

1) Answer: ----                                                                                Date: ----13/10/2018

2) Answer: ----

(a) & (b):----