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SVETLANKA909090 [29]
3 years ago
10

In a random sample of 28​ families, the average weekly food expense was​ $95.60 with a standard deviation of​ $22.50. determine

whether a normal distribution or a​ t-distribution should be used or whether neither of these can be used to construct a confidence interval. assume the distribution of weekly food expenses is normally shaped.
a. cannot use normal distribution or​ t-distribution.
b. use the​ t-distribution.
c. use normal distribution.
Mathematics
1 answer:
garik1379 [7]3 years ago
7 0
F. For food stamps for
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Answer is -23

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Then divide 7

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. George inherited 125 football cards from his cousin. Each month, he is going to add 3 to his collection. Which inequality can
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Step-by-step explanation:

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6 0
3 years ago
Pls help. Find radicals in simplest form find missing side lengths​
MArishka [77]

High school math tip: learn how to apply the ratios 1:1:√2 for the 45/45/90 right triangle and 1:√3:2 for the 30/60/90 triangle; these two triangles probably constitute 90% of the examples and problems you'll see.

He we have half a square, the 45/45/90 isosceles right triangle, sides in ratio 1:1:√2.   We write that ratio for our sides and solve.

1:1:√2 = (3/2)√2 : y : x

Ratios are pretty much like fractions, and we can make fraction equations out of corresponding pairs:

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y = (3/2)√2

1 /√2  = (3/2)√2 / x

x = (3/2)√2 × √2 = (3/2)(2) = 3

Answer: y =  (3/2)√2, x = 3

It's not too hard to get fast at these and just say y=(3/2)√2 because it's an isosceles triangle and x = y×√2 = 3 for the hypotenise.

8 0
3 years ago
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