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
Answer:
6/8
Step-by-step explanation:
x^2=36/64
x=√36/√64
x=6/8
The tree is 4 times as tall as the man, so we expect its shadow to be 4 times as long as the man's: 4 × 7.5 ft = 30 ft.
Answer:
The main difference between descriptive and inferential statistics is that descriptive statistics describe what the data show whereas with inferential statistics the goal is to reach conclusions that extend beyond the data in hand. Descriptive statistics are used to describe or summarize data in hand from a sample or a population.
Step-by-step explanation:
Answer:
if each was used only once, the answer would be 52080
Step-by-step explanation:
