Mathematics, 13.02.2020 06:57 JonJon05
The mean number of hours per day spent on the phone, according to a national survey, is four hours, with a standard deviation of two hours. If each time was increased by one hour, what would be the new mean and standard deviation? (2 points)
Select one:
a. 4, 2
b. 4, 3
c. 5, 2
d. 5, 3
Answers: 2
Mathematics, 21.06.2019 17:20
Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x
Answers: 1
Mathematics, 21.06.2019 19:20
The square root of 9x plus 7 plus the square rot of 2x equall to 7
Answers: 1
Mathematics, 21.06.2019 19:30
Need now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.
Answers: 1
Mathematics, 21.06.2019 22:30
How can you find the mean absolute deviation (mad) for this set of data?
Answers: 3
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