Answer: z= -2.35
Step-by-step explanation:
When the population variation is know, then we calculate the z-statistic.
Formula to calculate the z-test statistic is given by :-

where , n= sample size
= sample mean
= Population mean
=Population standard deviation.
As per given we have,
n= 270



Then, z-statistic will be
(Substitute all the values )
Hence, the value of the test statistic= z= -2.35
Dan815 says:
548 5/8 are 7th grade = 5/8*548=#nmber of 7th graders in total 3/8th are 8th graders = 3/8 *548=#of 8th graders in total 4/5 of Total 7th graders = 4/5*5/8*548 7/8 of total 8th graders = 7/8*3/8*548
Happy studying!
Answer:
2x+10xy+y+6
Step-by-step explanation:
Answer: 11/4 x 7 = 11/2 ; 3/35 x 7 = 3/5 ; 5/7 x 7 = 5. So, the last three you listed work with 7 in the blank.