Answer:
A sample size of 385 is needed.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
That is z with a pvalue of 
, so Z = 1.96.
Now, find the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
You feel that a reasonable estimate of the standard deviation is 10.0 hours.
This means that 
What sample size is needed so that the expected margin of error of your estimate is not larger than one hour for 95% confidence?
A sample size of n is needed. n is found when M = 1. So
Rounding up:
A sample size of 385 is needed.
Answer:
you decude to go put for a walk. You walk 8km to the north in 2 hours, then you walk 3km to the south in 1 houryou decude to go put for a walk. You walk 8km to the north in 2 hours, then you walk 3km to the south in 1 houryou decude to go put for a walk. You walk 8km to the north in 2 hours, then you walk 3km to the south in 1 houryou decude to go put for a walk. You walk 8km to the north in 2 hours, then you walk 3km to the south in 1 hour 6655.22591
The following questions are related to problems on simple fraction and arithmetic. Hence, the solutions to the questions are as follows :
1.)
Time on mathematics =<em> 1 hour</em>
Time on science homework = <em>7/8</em><em> hours</em>
Total time spent = (1 + 7/8) = 
2.)
Total number of students = <em>60</em>
Fraction of girls = <em>3/4</em>
Fraction of boys = 1 - 3/4 = 1/4
Number of boys = 1/4 × 60 = 15 boys
3.)
Initial temperature = <em>- 2°C</em>
Final temperature = <em>8°C</em>
Change in temperature = Final temperature - Initial temperature
Change in temperature = (8 - (-2)) = 8 + 2 = 10°C
4.)
Elevation of everest = <em>20028 feets </em>
Elevation of dead sea =<em> - 485 feets</em>
Difference in elevation = (20028 - (-485)) = 20513 feets
5.)
Question is missing key values.
Learn more : brainly.com/question/10483418
To solve this, you'll need the interest formula: <span> P(1 + rt).
Then, plug in the numbers:
$500(1.08*3) = $1,620. That's your answer.</span>
30,398.40. I think 6.85%-6.475%=0.375%x3/30. Then $340,000- the numbers.
