Mathematics, 12.06.2021 14:00 zazy15
1. [10 points) A business consultant wanted to
investigate if providing day-care facilities on premises
by companies reduces the absentee rate of working
mothers with children under six years old. She took a
sample of 45 such mothers from companies that provide
day-care facilities on premises. These mothers missed
an average of 6.4 days from work last year with a
standard deviation of 1.20 days. Another sample of 50
such mothers taken from companies that do not provide
day-care facilities on premises showed that these
mothers missed an average of 9.3 days last year with a
standard deviation of 1.85 days.
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a. Using a 2.5% significance level, can you conclude that
the mean number of days missed per year by mothers
working for companies that provide day-care facilities
on premises is less than the mean number of days missed
per year by mothers working for companies that do not
provide day-care facilities on premises?
b. Describe the Type 1 error in the context of the
problem and its probability for the hypothesis test.
3. [10 points] A survey of 1000 young adu
found that among adults aged 18-29, 35%
Answers: 3
Mathematics, 21.06.2019 19:00
Billy plotted −3 4 and −1 4 on a number line to determine that −3 4 is smaller than −1 4 is he correct? explain why or why not?
Answers: 3
Mathematics, 21.06.2019 19:40
Atextile fiber manufacturer is investigating a new drapery yarn, which the company claims has a mean thread elongation of 12 kilograms with a standard deviation of 0.5 kilograms. the company wishes to test the hypothesis upper h subscript 0 baseline colon mu equals 12 against upper h subscript 1 baseline colon mu less-than 12 using a random sample of n equals 4 specimens. calculate the p-value if the observed statistic is x overbar equals 11.8. round your final answer to five decimal places (e.g. 98.76543).
Answers: 3
Mathematics, 21.06.2019 20:00
Pepe and leo deposits money into their savings account at the end of the month the table shows the account balances. if there pattern of savings continue and neither earns interest nor withdraw any of the money , how will the balance compare after a very long time ?
Answers: 1
Mathematics, 21.06.2019 20:00
How does the graph of g(x)=⌊x⌋−3 differ from the graph of f(x)=⌊x⌋? the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted right 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted up 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted down 3 units. the graph of g(x)=⌊x⌋−3 is the graph of f(x)=⌊x⌋ shifted left 3 units.
Answers: 1
1. [10 points) A business consultant wanted to
investigate if providing day-care facilities on prem...
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