Trace metals in drinking water affect the flavor and an unusually high concentration can pose a health hazard. We obtain the fol
lowing data for 9 glasses of water. Each glass contained the same amount of water. We look at the zinc concentration (mg/L) in bottom water and the zinc concentration in surface water for each glass. It is fine to round any standard deviations to 2 decimals. Glass 1 2 3 4 5 6 7 8 9 Bottom Water .48 .32 .62 .58 .76 .77 .70 .64 .52 Surface Water .42 .24 .39 .41 .61 .61 .63 .52 .41
1 answer:
You might be interested in
Answer:
1072
Step-by-step explanation:
the angle is 108, so x10 then minus 8. when theres a letter next to the number it means to multiply it, so get the answer; then multiply it. example:
right angle 10x so 90x10. 900. hope this helps!
Answer:
The probability that the mean daily revenue for the next 30 days will exceed $7500 is 0.0855
Step-by-step explanation:
It has been given that
Now, the formula for z-score of a normal distribution is given by
Substituting the known values, we get
Simplifying, we get
Now, we have to find that the daily revenue for next 30 days will exceed $7500.
Thus, we have to find
P(z>1.369238)
From the normal distribution table, we have
P(z>1.369238)= 0.0855
Therefore, required probability is 0.0855