Answer:
Lower limit = 1007.95 cm/s
Upper limit = 1142.05 cm/s
Step-by-step explanation:
We have to calculate a 95% CI with population's standard deviation known.
The sample is size n=60, with mean M=1075.
The confidence interval can be expressed as:

For a 95% CI, the value of z=1.96.

Answer is square root of 39
Answer:
60
Step-by-step explanation:
48 multiplied by 25% = 48 multiplied by 0.25 = 12
48 plus the increase = 60
Only thing i could think of to answer this is a scatter-plot. hope this helps..