Answer:
4 flowers
Step-by-step explanation:
Number of flowers planted: 
Jack has 9 flowers that he needs to plant. We need to subtract 5 from 9 to find out how many flowers he still needs to plant.
Jack has 4 more flowers left to plant.
The phrasing "nine times out of ten" means 9/10 = 0.90 = 90% is the confidence level. We're confident 90% of the time that the confidence interval captures the population parameter we're after (in this case mu = population mean)
The portion "have an average score within 5% of 75%" means that 75% = 0.75 is the center of the confidence interval, and it goes as low as 0.75 - 0.05 = 0.70 and as high as 0.75 + 0.05 = 0.80
This confidence interval is from 70% to 80%, meaning that nine times out of ten, we're confident that the average score is between 70% and 80%
We write the confidence interval as (0.70, 0.80). It's common to use the notation (L, U) to indicate the lower (L) and upper (U) boundaries. You might see the notation in the form L < mu < U. If so, then it would be 0.70 < mu < 0.80; either way they mean the same thing.
The margin of error is 0.05 as its the 5% radius of the interval. It tells us how far the most distant score is from the center (75%)
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In summary, we have these answers
- confidence level = 90%
- margin of error = 5% = 0.05
- confidence interval = (0.70, 0.80)
- interpretation = We're 90% confident that the average exam score is between 0.70 and 0.80
Answer:
The correct answer is (0, -2) (5, -5) (-3, 4)
Step-by-step explanation:
The given inequality is x ≥ -3
<u>To find the correct answers</u>
1) (0, -2)
x ≥ -3
0 ≥ -3 TRUE
2) (5, -5)
x ≥ -3
0 ≥ -3 TRUE
3) (-3, 4)
x ≥ -3
0 ≥ -3 TRUE
4) (-4, -2)
x ≥ -3
5 ≥ -3 FALSE
Therefore the correct answer is (0, -2) (5, -5) (-3, 4)
We can calculate (62 + 90) / 2 = 76. it's <span>known that 95% lies between the mean and twice the standard deviation. </span><span>if the mean is "μ" and the standard deviation is "σ": </span><span>μ-2σ and μ+2σ. i</span><span>f μ=76, then </span><span>76+2σ = 90, so 2σ = 14, so σ = 7.
</span>
<span>the mean is 76 and the standard deviation 7. </span>
