Item 8 Question 1
You are designing a diamond-shaped kite. You know that AD=44.8 centimeters, DC=72 centimeters, and AC=84.8 centimeters. You want to use a straight crossbar BD¯¯¯¯¯¯¯¯. About how long should the crossbar be? Round your answer to the nearest tenth.

d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;

answer: group b.

step-by-step explanation:

3000000000000000000000

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