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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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What is 1 divided by 5^-2? Please give clear explanation. thanks.
Pani-rosa [81]
1 / 5^-2

First, let's work out the denominator.
5^ -2 = 1/25. When an exponent is negative, it means to put a 1 over the product. Like we did earlier.

Now we have 1 / (1/25). 

1 / (1/25)
Divide 1 by 25.
1 / 0.04
Divide 1 by 0.04
25

The answer is 25!

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3 years ago
Add the group of numbers below. Make sure<br> your answer is fully reduced.<br> 1/3+1/5+2/5
RideAnS [48]

Answer:

14/15

Step-by-step explanation:

3 0
3 years ago
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fladli sells televisions. He earns a fixed amount for each television and an additional $ 20 if the buyer gets an extended warra
ivanzaharov [21]

Answer: $80


Step-by-step explanation:

Given: The amount earned by Fadil on selling 14 televisions= $1400

Therefore, the amount he earned on selling 1 television=\frac{1400}{14}=\$100

Since, he sold televisions with extended warranty and he earns $20 additional for it.

Then, the fixed amount Fadil earns for each​ television=\$100-\$20=\$80

Hence, Fadil earns $80 as the fixed amount for each televison.

4 0
4 years ago
Peer review involves scientists openly publishing details of the methods they used, the results of
IrinaK [193]

Answer: 1. Peer review involves scientists openly publishing details of the methods they used, the results of

their experiments, and the reasoning behind their hypotheses for other scientists working in the

same field to evaluate. = B true .

2. Data from controlled experiments can provide evidence that one variable causes another. = B true .

Step-by-step explanation:

Peer review is when a scientist conducts an experiment and then gives all of their information and findings to peers in order for them to follow the findings and see if the first findings are rational.

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4 years ago
Solve for X and show work
Len [333]
I don’t know how to show how I got it but the answer is X=12.
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3 years ago
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