In April 2025
Search & Filtering
Four rowers weighing 152, 156, 160, and 164 pounds make up a rowing team. Calculate the sample mean for each of the possible random samples with a size two replacement. They can be used to calculate the sample mean's probability distribution, mean, and standard deviation.
Read job vacancies posts on the classified ads section of a newspaper. Then, draw conclusions about the type of
people who will apply for each job. Write your conclusions based on facts and include the newspaper clippings where
you got the information.
A concerned citizen group claims that 50% of the people in the city A support making beers illegal. Yoi decide to test this claim and ask a random sample of 315 out of 6000 people in the concerned city whether they support making beers illegal, 49% support this law. At 0.05 significance level, is there enough evidence to support this claim?
What is the shape of the sampling distribution of the means if random of size n becomes larger?
IQ scores for adults are normally distributed with mean of 100 and standard deviation of 15. What percent of adults have IQ scores greater than 130?
With α=.10
α=.10, what are the critical values?
A rowing team consists of four rowers who weigh 152, 156, 160 and 164 pounds.
- How many samples of size n=2 can be drawn from this population ?
- Construct a table showing all possible samples, mean and probability of each sample.
- Construct the sampling distribution ( probability distribution ) of the sample means.
- Draw the histogram of the sampling distribution of the means
A normal distribution has standard deviation 16. We have null hypothesis (h 0): mean = 5 and alternative hypothesis (h 1): mean = k. We reject the null hypothesis when > k-2 Find k and sample size (n) when P (Type 1 error) = 0.228 and P (Type 2 error) = 0.1587
The personnel manager of a firm wants to compare the job satisfaction level of the employees among the firm’s Finance, Purchase and Sales departments. A battery of questions are administered to randomly selected employees from each of the three departments resulting in the following job satisfaction level scores: Finance: 14, 12, 13, 12, 11 Purchase: 18, 19, 20, 18, 16 Sales: 10, 12, 17, 11, 13
A company makes parts for a machine. The lengths of the parts must be within certain limits or they will be rejected. A large number of parts were measured and the mean and standard deviation were calculated as 3.1 m and 0.005 m respectively. Assuming this data is normally distributed and 99.7% of the parts were accepted, what are the limits?
