Answer: -2.10
Step-by-step explanation:
Given :
Sample size : n= 50, since the sample size is greater than 30 , so we apply z-test.
Sample mean :
Standard deviation :
The test statistic for population mean :-
i.e.
Hence, the value of the test statistic = -2.10
99.90%
<h3>Step-by-step explanation:</h3>STEPS:
Find the total sum
30.2 mil = 30,200,000 small businesses + 30,000 other = 30,230,000 total
Find the fraction that small businesses make up of the total
Convert to percentage
0.9990 → % = 0.9990 × 100 = 99.90%
Hope this helps,