Answer:
Products Repaired Frequency
DVD Player 7
TV 3
Radio 3
MP3 Player 5
Blu-ray Player 7
Total = 25
Step-by-step explanation:
Frequency distribution table represent the information of a data in a tabular form telling us about the items present in the sample and the number of times it occur.
Each item was picked from the list and written under 'Products repaired' then the number of times each item appeared is the frequency.
8.5 meters in half is 4.25 meters which is 4250 milimeters =D
1) Call x the sample mean = 3.56
2) Call s the sample standard deviation = 0.2
3) Given that the variable is normally distributed and the sample is large, you determine the interval of confidence from:
x +/- Z(0.5) s/√n
Wehre Z(0.5) is the value of the probabilities over 5% (90% of confidence mean to subtract 10%, which is 5% for each side (tails) of the normal distribuition) and is taken from tables.
Z(0.5) = 0.3085
Then the inteval is
x +/- 0.385 *s /√n = 3.56 +/- 0.385 * 0.2/√45
3.56 +/- 0.011 = ( 3.549, 3.571). This is the answer.
