A total of 165 people attended the opening night of a school play. Adults were charged $6, and children were charged $2. The tot
2 answers:
Answer:
Step-by-step explanation:
A total of 165 people attended the opening night of a school play.
Let there were adults = x and number of children = y
So x + y = 165 ----------(1)
Now we know adults were charged $6 and children $2.
The total amount collected $618
so 6x + 2y = 618 ----------(2)
Now the augmented matrix for the system of equations will be
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Answer:
126°
Step-by-step explanation:
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Answer:
The sample consisting of 64 data values would give a greater precision.
Step-by-step explanation:
The width of a (1 - <em>α</em>)% confidence interval for population mean μ is:
So, from the formula of the width of the interval it is clear that the width is inversely proportion to the sample size (<em>n</em>).
That is, as the sample size increases the interval width would decrease and as the sample size decreases the interval width would increase.
Here it is provided that two different samples will be taken from the same population of test scores and a 95% confidence interval will be constructed for each sample to estimate the population mean.
The two sample sizes are:
<em>n</em>₁ = 25
<em>n</em>₂ = 64
The 95% confidence interval constructed using the sample of 64 values will have a smaller width than the the one constructed using the sample of 25 values.
Width for n = 25:
Width for n = 64:
Thus, the sample consisting of 64 data values would give a greater precision