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likoan [24]
3 years ago
10

A 90% confidence interval for the average weight (in pounds) of Americans was found to be (185, 210). The point estimate for thi

s confidence interval is:_______
a. 25
b. 12.5
c. 197.5
d. 1.645
Mathematics
1 answer:
Lynna [10]3 years ago
3 0

Answer:

B. 12.5

Step-by-step explanation:

We have the lowe confidence interval = 185

The upper confidence interval = 210

Mean of X = (lower confidence + upper confidence interval)/2

Mean of X = 185 + 210/2

= 197.5

The margin of error = the upper confidence interval - mean of X

= 210-197.5

= 12.5

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For each day enter the number of hours worked. Use the format shown in Model 1 and answer in terms of a reduced fraction.
natulia [17]
It is often easiest to use "military time". That is, add 12 to all the afternoon numbers and do the subtraction in the usual way. Of course, 1 hour = 60 minutes, so 10 minutes = 10/60 hour = 1/6 hour.

Mon: 15:10 -8:00 = 7:10 = 7 1/6

Tue: 15:25 -8:05 = 7:20 = 7 1/3

Wed: 14:30 -8:00 = 6:30 = 6 1/2

Thur: 14:45 -7:55 = 7:(-10) = 6:50 = 6 5/6

Fri: 15:38 -7:58 = 8:(-20) = 7:40 = 7 2/3

_____
Some calculators have nice features for working with degrees, minutes, and seconds. In this context, degrees and hours are the same thing. That is, the base-60 arithmetic is the same whether you consider the numbers to be hours or degrees. Similarly, some calculators convert nicely between decimal fractions and mixed numbers. In short, a suitable calculator will almost do this math for you. (You just need to add 12 to all the numbers in the column on the right.)
3 0
3 years ago
Please help! 37. A and B
Volgvan

Answer:

a

Step-by-step explanation:

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6 0
2 years ago
Read 2 more answers
A famous painting was purchased for $560,000 in the year 2021. The value has been increasing by $8,000 per year.
yarga [219]

The price of a painting in the year 2022 will be $ 568,000.

<h3>What is inflation?</h3>

A rise in the amount of a certain product or service is known as inflation.

Given data;

Cost of painting in the year 2021, P₁ = $560,000

Cost of painting in the year 2022, P₂ =?

The amount increases every year,x = $8,000

The cost of painting in the year 2022 is found as;

P₂ = P₁ + x

P₂= $560,000 + $8,000

P₂ = $ 568,000

Hence the price of a painting in the year 2022 will be $ 568,000.

To learn more about inflation refer;

brainly.com/question/19263433

#SPJ1

6 0
1 year ago
If x=square root of 6 and y^2=12 then 4/xy=
vova2212 [387]
Y² = 12
y = 2√3

x = √6

Now, 4 /xy
= 4/2√3√6
= 2 / 3√2
= √2/3

In short, Your Answer would be √2 / 3

Hope this helps!
5 0
3 years ago
Read 2 more answers
What is the slope of this graph? <br> 1/4 <br> -1/4<br> 4<br> -4
Klio2033 [76]

Answer:

the slope is 4

Step-by-step explanation:

5 0
3 years ago
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