Which of the choices shows these values from least to greatest?
1 answer:
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Answer:
The 90% confidence interval is (64.0101, 68.9899).
Step-by-step explanation:
Our sample size is 310.
The first step to solve this problem is finding our degrees of freedom, that is, the sample size subtracted by 1. So
.
Then, we need to subtract one by the confidence level and divide by 2. So:
Now, we need our answers from both steps above to find a value T in the t-distribution table. So, with 309 and 0.05 in the two-sided t-distribution table, we have
Now, we find the standard deviation of the sample. This is the division of the standard deviation by the square root of the sample size. So
Now, we multiply T and s
Then
LCL is the mean subtracted by M. So:
UCL is the mean added to M. So:
The 90% confidence interval is (64.0101, 68.9899).
Answer:
203 feet.
Step-by-step explanation:
Please find the attachment.
Let h represent the height of the building.
We have been given that at 3:30 in the afternoon in mid-September the Kimball Tower casts a shadow about 290 feet long when the sun's rays come down at an angle about 35 degrees above the horizontal.
We know that tangent relates opposite side of a right triangle to its adjacent side.
Upon substituting our given values in above formula, we will get:
Therefore, the building is approximately 203 feet high.
