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ale4655
1 month ago
5

In a study on the fertility of married women conducted by Martin O’Connell and Carolyn C. Rogers for the Census Bureau in 1979,

two groups of childless wives aged 25 to 29 were selected at random, and each was asked if she eventually planned to have a child. One group was selected from among wives married less than two years and the other from among wives married five years. Suppose that 240 of the 300 wives married less than two years planned to have children some day compared to 288 of the 400 wives married five years. Can we conclude that the proportion of wives married less than two years who planned to have children is significantly higher than the proportion of wives married five years? Make use of a P -value.
Mathematics
1 answer:
babunello [11.8K]1 month ago
4 0
We cannot infer that the proportion of wives married less than two years intending to have children is significantly greater than that of those married for five years.
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A barbershop requires appointments for perms and hair cuts. Ten percent of those making appointments cancel or simply fail to sh
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5 0
3 months ago
Vivian surveyed bicyclists in her community to see the average number of miles they biked per day. Her results are shown below.
babunello [11817]

Answer:

The Mean Absolute Deviation (MAD) for her dataset is 4.

Detailed explanation:

Vivian collected data from local cyclists to find the typical miles they rode daily.

Her recorded figures are shown below:

7, 10, 13, 4, 12, 21, 10, 3

mean=\frac{\text{Sum of data set}}{\text{number of values}}

=\frac{(7+10+13+4+12+21+10+3)}{8}

=\frac{80}{8}

= 10

MAD=\frac{\sum |A_1-f_1|}{n}

            Data point          Distance from mean

                                           

1                   7                           7 - 10   =     | -3 |     = 3

2.                10                           10 - 10  =     | 0 |       = 0

3.                13                           13 - 10  =     | 3 |     = 3

4.                4                             4 - 10    =    | -6 |    = 6

5.               12                            12 - 10   =    | 2 |     = 2

6.               21                            21 - 10   =    | 11 |   = 11

7.               10                            10 - 10   =    | 0 |     = 0

8.               3                             3 - 10   =    | -7 |   = 7

                                               

Calculating the total distance gives us 3 + 0 + 3 + 6 + 2 + 11 + 0 + 7 = 32

Thus, MAD = \frac{32}{8} = 4

The Mean Absolute Deviation of this data reflects an average variation of 4 miles that cyclists ride daily.

6 0
1 month ago
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