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Natali5045456 [20]
3 years ago
8

A graduate student wanted to estimate the average time spent studying among graduate students at her school. She randomly sample

d graduate students from her school and obtained a 99% confidence interval of (17,25) hours/week. Which of the following would be true if the level of confidence was lowered to 95%? Choose the correct answer below.A. The width of the confidence interval would remain the same.B. The width of the confidence interval would be smaller.C. The width of the confidence interval would be larger.D. More information is needed to determine what would happen to the width of the confidence interval.
Mathematics
1 answer:
expeople1 [14]3 years ago
3 0

Answer:

B. The width of the confidence interval would be smaller.

Step-by-step explanation:

By reducing the confidence level from 99% to 95%, the student assumes that there is more uncertainty about the new confidence interval than the previous one. That, being said, since the results aren't as certain, the confidence interval is widened towards a central average point because the new interval isn't as accurate.

Therefore, the answer is B. The width of the confidence interval would be smaller.

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A and Ly started sung money at the same time for Christmas gis erika started with $100 and added $35 a week. Uly saved $60 a wee
Anna [14]

Answer:

Step-by-step explanation:

Erika: y = 35x + 100

Ly: y = 60x + 25

60x + 25 = 35x + 100

25x + 25 = 100

25x = 75

x= 3 weeks

Erika: y = $35(3) + 100= 105 + 100 = $205

Ly: 60(3) + 25 = 180 + 25 = $205

6 0
3 years ago
I need help finding the area of this shape can you please help
BabaBlast [244]

Answer: 139.27

Step-by-step explanation:

So let find the area of the black swuare the length is 10 and the widith is 10, using bxh the area is 100. Now let find the aea of the semi-circle. The area of a fill circle is pi radius squared so a semi circle area will be 1/2( pi radius squared). The radius is 5 so we can calculate 1/2 of 25 pi equal = 39.27. Now let add the areas: 100+39.27=139.27.

8 0
2 years ago
24. 17 is 40% of what number?
EastWind [94]

Answer:

9.7

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
PPPPPPPPlease help me (20 points!!!!)
Vika [28.1K]

\longrightarrow{\mathfrak{\frac{-9}{6}÷\frac{3}{-2}}}

\longrightarrow{\sf{\frac{-\cancel{9}}{\cancel{6}}\times\frac{-\cancel{2}}{\cancel{3}}}}

\longrightarrow{\sf{\frac{3}{3}}}

\longrightarrow{\boxed{\bf{1}}}

Identity applied -

\star{\:\:\:\:\:\:\boxed{\bf{\frac{a}{b}÷\frac{c}{d}=\frac{a}{b}\times\frac{d}{c}}}}

4 0
2 years ago
Given h(x) = -5x – 1, solve for x when h(x) = -6.
andrey2020 [161]

Answer:

h(x) = 1

Step-by-step explanation:

h(x) = both of these equations, but really only -6. Plug in 1 to x in the equation and it will equal -6.

Hope this helps

5 0
3 years ago
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