appears to be nowadays that understudies need to work increasingly more every week to have the option to bear the cost of the expenses of school. For a new work review directed by the public authority, there were

77

respondents who were working while at the same time going to school. The recurrence circulation beneath sums up the quantity of hours worked each week as revealed by the respondents.

Number of hours

worked each week

(hours per week) Frequency

26

to

30

8

31

to

35

24

36

to

40

19

41

to

45

14

46

to

50

9

51

to

55

3

In view of the recurrence dissemination, utilizing the midpoint of every information class, gauge the mean number of hours worked each week by the respondents. For your transitional calculations, utilize at least four decimal places, and round your response to one decimal spot.

hours of the week

You prepare for catastrophe. Examination discloses to you that there is a likelihood of 0.05% that power goes out because of climate on some random day (E).

What's more, the likelihood that you can't discover candles (C) is 5%, likelihood that you can't discover matches or lighters (M) is 3%.

What is the likelihood that you don't have light on some random day?

In this setting this implies that power goes out AND you can't discover candles or matches (E and (C or M)).

Expect that C and M are totally unrelated and that E, (C or M) are free.

Express all probabilities as decimal parts, or as regular portions with denominator 100. Offer the response as number in 1,000,000 (the appropriate response is only that number).

he following are the yearly earnings (in large number of dollars) for

8

arbitrarily picked, U.S. grown-ups utilized full-time:

96

,

37

,

46

,

92

,

49

,

96

<12>

,

96

,

62

Send information to mini-computer

(a) What is the mean of this informational index? On the off chance that your answer isn't a number, round your response to one decimal spot.

(b) What is the middle of this informational index? On the off chance that your answer isn't a whole number, round your response to one decimal spot.

(c) what number modes does the informational index have, and what are their qualities? Demonstrate the quantity of modes by clicking in the fitting circle, and afterward show the value(s) of the mode(s), if relevant.

zero modes

one mode:

two modes:

furthermore,

A normal of 1 bundle is shipped off a worker in 1 second. The worker, then again, readies a report utilizing the 5 bundles got. The time between bundles is displayed as an outstanding irregular variable. Leave X alone an irregular variable communicating the time it takes the worker to set up a report. The time taken to set up a report;

a) Find the likelihood that it is over 10 seconds.

b) Find the likelihood that it is between 5 seconds and 10 seconds.