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11Alexandr11 [23.1K]
3 years ago
7

Elly and Drew work together to collect data to estimate the percentage of their classmates who own a particular brand of shoe. U

sing the same data, Elly will construct a 90 percent confidence interval and Drew will construct a 99 percent confidence interval. Which of the following statements is true?a. The midpoint of Elly's interval will be greater than the midpoint of Drew's interval. b. The midpoint of Elly's interval will be less than the midpoint of Drew's interval. c. The width of Elly's interval will be greater than the width of Drew's interval. d. The width of Elly's interval will be less than the width of Drew's interval. e. The width of Elly's interval will be equal to the width of Drew's interval
Mathematics
1 answer:
ladessa [460]3 years ago
4 0

Answer:

d. The width of Elly's interval will be less than the width of Drew's interval.

Step-by-step explanation:

The confidence level and the width of the confidence interval are direct proportional. This means that a confidence interval with a higher confidence level has a higher width.

For example, a 99 percent confidence interval is wider than a 90 percent confidence interval.

The midpoint of the confidence interval is the mean of the population, no matter the confidence level.

In this problem, we have that:

Elly: 90 percent CI

Drew: 99 percent CI

The correct answer is:

d. The width of Elly's interval will be less than the width of Drew's interval.

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What is the experamental probability that the coin lands on heads?
sammy [17]

Answer:

The experamental probability that the coin lands on head is 50 %

Step-by-step explanation:

Given:

Experiment:

A coin is Toss

Let the Sample Space be 'S' that is total number of outcomes for a coin has been tossed = { Head, Tail }

∴ n ( S ) =  2

Let A be the event of getting a Head on tossing a coin i.e  { Head }

∴ n( A ) = 1

Now,

\textrm{Probability} =\frac{\textrm{outcomes for the experiment}}{\textrm{total number of outcomes}}

Substituting the values we get

P(A) = \frac{n(A)}{n(S)} \\\\P(A) = \frac{1}{2} \\\\P(A) = 0.5\\\\P(A) = 50\%

The experamental probability that the coin lands on head is 50 %

5 0
3 years ago
The difference between two integers is 13 and their sum is 87. What are the two integers
e-lub [12.9K]
The answer would be 50 and 37.

50-37 = 13

50+37 = 87
4 0
3 years ago
Read 2 more answers
The circumference of a circular field is 279.46 yards. What is the radius of the field? Use 3.14 for π and do not round your ans
wel

Answer:

44.5 yards

Step-by-step explanation:

Start with the formula of the circumference of a circle.

C = πd

Now all you have to do is plug in the numbers.

279.46 = (3.14)d

Divide both sides by 3.14

d = 89

But since you're finding the radius, you have to divide the diameter by 2.

89/2 = 44.5

6 0
3 years ago
I need help with writing a word problem that can be evaluated by the algebraic expression 372 + r, and evaluate it for r = 137.
Soloha48 [4]

Gabe had 372 apples and r grapes. The total of grapes and apples gabe has are 509. How many grapes did gabe have?


4 0
3 years ago
a recipe requires 1/2 cup of milk and 1/3 cup of water. How much more milk is required for tge recipe than water? ​
ycow [4]

Answer:

1/6 cup of milk

Step-by-step explanation:

1/2 (amount of milk)- 1/3 (amount of water)

1/2 = 3/6

1/3 = 2/6

3/6 - 2/6 = 1/6

Hope this helped <3

7 0
3 years ago
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