Mathematics, 24.04.2020 15:22 carter283
Two community service groups, J and K, each have less than 100 members. Members of both groups volunteer each month to participate in a community-wide recycling day. A study was conducted to investigate whether the mean number of days per year of participation was different for the two groups. A random sample of 45 members of group J and a random sample of 32 members of group K were selected. The number of recycling days each selected member participated in for the past 12 months was recorded, and the means for both groups were calculated. A two-sample t-test for a difference in means will be conducted. Which of the following conditions for inference have been met?
I. The data were collected using a random method.
II. Each sample size is less than 10 percent of the population size.
III. Each sample size is large enough to assume normality of the sampling distribution of the difference in sample means.
a. I only
b. II only
c. III only
d. I and III only E. I, II, and III
Answers: 1
Mathematics, 21.06.2019 16:30
How do you summarize data in a two-way frequency table?
Answers: 3
Mathematics, 21.06.2019 19:00
Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.
Answers: 2
Mathematics, 21.06.2019 20:00
Seymour is twice as old as cassandra. if 16 is added to cassandra’s age and 16 is subtracted from seymour’s age, their ages become equal. what are their present ages? show !
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
Two community service groups, J and K, each have less than 100 members. Members of both groups volun...
Mathematics, 24.02.2021 14:00
Mathematics, 24.02.2021 14:00
Mathematics, 24.02.2021 14:00
Mathematics, 24.02.2021 14:00
Chemistry, 24.02.2021 14:00
Physics, 24.02.2021 14:00
History, 24.02.2021 14:00
Mathematics, 24.02.2021 14:00