Mathematics, 10.06.2021 17:40, liyahsmith9305
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.
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. Construct a 98% confidence interval for the difference between the two population means.
i. State the hypothesis
ii. State the rejection or nor rejection region
iii. Calculate the test statistics
iv. State the conclusion
Answers: 1
Mathematics, 21.06.2019 15:10, fastpitchhailey1354
Marcus needs to rewrite f(x) = x2 + 6x + 4 in vertex form.
Answers: 1
Mathematics, 21.06.2019 18:30, anabellabenzaquen
The volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.
Answers: 3
Mathematics, 21.06.2019 20:00, lattimorekeonna1
Find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible
Answers: 1
A business consultant wanted to investigate if providing day-care facilities on premises by companie...
Social Studies, 29.10.2020 22:20
Computers and Technology, 29.10.2020 22:20
Chemistry, 29.10.2020 22:20
Mathematics, 29.10.2020 22:20