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Nikitich [7]
3 years ago
15

I need help fast

Mathematics
1 answer:
Anni [7]3 years ago
6 0

Answer:

2.83 units diagonally

2 units horizontally and 2 units vertically

Step-by-step explanation:

x position difference      -2-(-4)=2

y position difference       7-5=2

2 units horizontally and 2 units vertically on a graph

2^2+2^2=8

sq rt 8=2.83 units

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A professor wants to estimate how many hours per week students study. A simple random sample of 78 students had a mean of 15.0 h
OleMash [197]

Answer:

interval=(15.085,14.9515)

Step-by-step explanation:

Table:

CI                                             Z

85%                                     1.440

90%                                     1.645

95%                                     1.960

In order to find the interval/estimate of hours per week students study we consider the formula given below:

Interval=X±\frac{Z*S}{\sqrt{n} }

where:

X is the mean hours

Z is the value from Z distribution table of Confidence Interval

n is the sample size of students

S is the standard deviation

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Interval=15±1.645*2.3/\sqrt{78}

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