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vaieri [72.5K]
3 years ago
10

An 80% confidence interval for a proportion is found to be (0.42, 0.48) . What is the sample proportion ?

Mathematics
1 answer:
ddd [48]3 years ago
6 0

Answer:

0.45, thats what we got

Step-by-step explanation:

a p e x

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A friend claims that it will rain today with probability 30% and tomorrow with probability four times as great as today. Which o
Bad White [126]

Answer:

  The claim cannot be true because any probability is between 0 and 1.

Step-by-step explanation:

4 times 0.30 is 1.20, a value that cannot be a probability. Any probability will be between 0 and 1 (inclusive).

The claim cannot be true because any probability is between 0 and 1.

5 0
3 years ago
Read 2 more answers
5. Given beverage sales of $5,400 and cost of beverages sold of $900.00, the beverage cost
sertanlavr [38]

Answer:

25%

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
A case of deodorant costs $57. You get a business discount of 15%, and you have a coupon for 20% off. How much will the case of
finlep [7]

Answer:

$37.05

Step-by-step explanation:

If you take 15% and 20% you get (15%+20%) which is 35%, then you take 100%-35% you get 65%, 65% of 57 is 37.05.

Thus Your Answer: $37.05

4 0
3 years ago
How many different four-digit numbers can be formed with the numbers 7; 4; 5; 1; 2; 9; and 8?
vodomira [7]
Two answers are possible.
One is with the repetition of digits.
The other is without repetition of digits.
ANSWER 1: With Repetition
Numbers: 1,2,4,5,7,8
There are 4 digits __ __ __ __
1st digit can be filled by any of the 6 numbers.
Similarly 2nd, 3rd and 4th digits.
Hence each digit will have 6 possibilities.
Therefore no.of 4 digit numbers that can be formed are 6 x 6 x 6 x 6 = 1296
ANSWER 2: Without Repetition
4 digits __ __ __ __
Now the first digit can be filled by any of the six numbers. Therefore there are 6 possibilities
The second digit will have only 5 possibilities as one of the numbers gets used up by the 1st digit.
Similarly the 3rd and 4th digits will have 4 and 3 possibilities respectively.
Therefore no.of 4 digit numbers that can be formed are 6 x 5 x 4 x 3 = 360
8 0
3 years ago
Suppose that cot θ = c and 0 < θ < π 2 . what is a formula for cos θ in terms of c?
loris [4]

Answer:

<h3>cosθ = c/√1+c²</h3>

Step-by-step explanation:

Given cot θ = c and 0 < θ < π/2

In trigonometry identity:

cotθ  = 1/tanθ = c

1/tanθ = c

cross multiply

tanθ  = 1/c

According to SOH, CAH, TOA:

Tanθ = opposite/adjacent = 1/c

cosθ = adjacent/hypotenuse

To get the hypotenuse, we will use the pythagoras theorem:

hyp² = opp²+adj²

hyp² = 1²+c²

hyp = √1+c²

Find cosθ in terms of c

cosθ = c/√1+c²

Hence the formula for cos θ in terms of c is cosθ = c/√1+c²

5 0
3 years ago
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