Find 2.64 / 0.6 step by step
1 answer:
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Answer:
Following are the responses to the given points:
Step-by-step explanation:
Given:
Using formula:
For point a:
For point b:
For point c:
For point d:
Hence, the correct choice is "i".
For point e:
Answer:
AT = 8
Step-by-step explanation:
Using the sine ratio in the right triangle
and sin45° =
sin45° = =
=
Multiply both sides by AT
AT × sin45° = 8, that is
AT × = 8
Multiply both sides by
AT = 8
The margin of error is defined as
where
σ = population standard deviation
n = sample size
z* = aconstant that depends on the confidence level.
At the 95% confidence level, z* = 1.96.
The confidence interval is calculated as
(μ - E, μ + E)
Given:
μ = 3, the mean number of pets,
E = 2.5, margin of error at the 95% confidence level.
Therefore the 95% confidence interval is
(3 - 2.5, 3 +2.5) = (0.5, 5.5)
Because we can only count whole numbers of pets, the confidence interval is (0, 5).
Answer:
At the 95% confidence level, the 5th graders own between 0 and 5 pets.
where
σ = population standard deviation
n = sample size
z* = aconstant that depends on the confidence level.
At the 95% confidence level, z* = 1.96.
The confidence interval is calculated as
(μ - E, μ + E)
Given:
μ = 3, the mean number of pets,
E = 2.5, margin of error at the 95% confidence level.
Therefore the 95% confidence interval is
(3 - 2.5, 3 +2.5) = (0.5, 5.5)
Because we can only count whole numbers of pets, the confidence interval is (0, 5).
Answer:
At the 95% confidence level, the 5th graders own between 0 and 5 pets.