Answer:
c). Two tailed test
Step-by-step explanation:
The given hypothesis are
Null hypothesis: H0:μ= 1.7
Alternative hypothesis: H1:μ≠ 1.7
The alternative hypothesis demonstrates that mean number of children are not 1.7 in 2000. This means that mean number of children can be greater than 1.7 or mean number of children can be less than 1.7. Thus, the given alternative hypothesis indicates the two tailed test.
Answer:
B
The answer is b
Step-by-step explanation:
Answer: d) 2.5
<u>Step-by-step explanation:</u>
The mean is 16 so it has a z-score is 0
The standard deviation is 4 so:
- z-score of 1 is: 16 + 4 = 20
- z-score of 2 is: 20 + 4 = 24
- z-score of 3 is: 24 + 4 = 28
Notice that 26 is between the z-scores of 2 and 3 = 2.5
Algebraically:
In the initial number xx7,xxx; 7 is in the thousands place meaning its value is 7,000.
If it is moved to the tens place = xxx,x7x then it's value will decrease, it will become 70 only.
Every placement has its corresponding values, thus whereven the number 7 is place it is multiplied by its corresponding values (ones, tens, hundreds, etc).