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Olin [163]
3 years ago
10

A group of 367 first-year college students were asked, “About how many hours do you study during a typical week?” The mean respo

nse is 25.7 hours. Assume that the study time is normally distributed with a sample standard deviation of 5.7 hours. Construct a 95% confidence level interval for the mean study time of all first-year students.
Mathematics
1 answer:
adelina 88 [10]3 years ago
5 0
Multiply the number of collage students vs the hours and how many days a week
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The height of the Empire State Building is 1250 feet tall. Your friend, who is 75 inches tall, is standing nearby and casts a sh
Lyrx [107]
Answer:

The length of the building's shadow = 550.66 ft

Explanations:

The height of the Empie State Building = 1250 feet

The friend's height = 75 inches

The length of the friend's shadow = 33 inches

\frac{Actual\text{ height of the friend}}{\text{Length of the friend's shadow}}=\text{ }\frac{Height\text{ of the building}}{\text{Length of the building's shadow}}\begin{gathered} \frac{75}{33}=\text{ }\frac{1250}{\text{Length of the building's shadow}} \\ 2.27\text{ =  }\frac{1250}{\text{Length of the building's shadow}} \\ \text{Length of the building's shadow = }\frac{1250}{2.27} \\ \text{Length of the building's shadow = }550.66\text{ f}et \end{gathered}

6 0
2 years ago
A truck rental company charges a one-
Mrac [35]

Answer:

D. 35

Step-by-step explanation:

.8(40+1x)=60

32+.8x=60

.8x=28

x=28/.8

X=35

6 0
3 years ago
The results of a poll show that the percent of people who want a new restaurant is in the interval (62%, 88%)(62%, 88%) . There
xenn [34]
Required percentage = (0.62 x 109482, 0.88 x 109,482) = (67879, 96,344)
5 0
3 years ago
Read 2 more answers
30 – 2x = x2 – 6x + 9 0 = x2 – 4x – 21 0 = (x + 3)(x – 7)
Setler79 [48]
X = {-3, 7} hope this helps
8 0
4 years ago
(20 points) Need help ASAP!!
ziro4ka [17]
1) 7; 5
2) 5; 25
3) 8; 15
5 0
4 years ago
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