Answer:
23.5
Step-by-step explanation:
4, 4, 6, 10, 11, 13, 14, 15, 25, 29, 33, 33, 35, 43, 51, 58
Median: 20
Lower quartile: 10.5
Upper quartile: 34
Interquartile range: 34 - 10.5 = 23.5
Answer: -2.10
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
Answer: 15 months
m=4
add 10 to both sides m-10+10=-6+10