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Citrus2011 [14]
3 years ago
7

I WILL MAKE YOU THE BRIANLIEST AND PLS HELP ASAP

Mathematics
1 answer:
frez [133]3 years ago
5 0

Answer:

you didnt give enough information

Step-by-step explanation:

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evablogger [386]

0.8/100 * 1046

=8.368

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In a survey of 1005 ​adults, a polling agency​ asked, "When you​ retire, do you think you will have enough money to live comfort
Sphinxa [80]

Answer: (0.504, 0.556)

Step-by-step explanation:

Given : Sample size : n= 1005

Number of adults stated that they were worried about having enough money to live comfortably in retirement = 531

Then the proportion of adults stated that they were worried about having enough money to live comfortably in retirement : p=\dfrac{531}{1005}\approx0.53

Significance level : \alpha: 1-0.90=0.1

Critical value : z_{\alpha/2}=1.645

The confidence interval for population proportion is given by :-

p\pm\ z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}\\\\=0.53\pm(1.645)\sqrt{\dfrac{0.53(1-0.53)}{1005}}\\\\\approx0.53\pm0.026\\\\=(0.504,\ 0.556)

Hence, the 90​% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement = (0.504, 0.556)

6 0
3 years ago
12 gallons of water fill a tank to 3\4 capacity.
harkovskaia [24]

Answer:

A. 16, B.32

Step-by-step explanation:

A.

We will say that T is the total capacity of the tank.

Since 12 gallons of water fill the tank to 3/4 capacity, we know that 12 gallons is 3/4 of the total capacity. Hence,

12=T \cdot \frac{3}{4}.

The last equation tells us that T=\frac{4\cdot 12}{3}=16.

B.

We will say that D is the number of half-gallon bottles that can be filled with the water of the tanke, note that D times 1/2 must be the total capacity of the tank. Hence,

D \cdot \frac{1}{2}=16

and so, we get that D=2 \times 16=32

7 0
3 years ago
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