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Q1) Number of credit cards carried by students can be modelled by using Poisson distribution. A sample of students generated following data credits cards X 0 1 2 3 4 5 6 students with X credit cards 44 249 388 106 37 12 3. Determine the sample size n, and therefore sample mean Xbar. Use this information to compute a 95% confidence interval for average number of credit cards carried by students.
Q2) Assume you require estimating population proportion p with a 95% confidence interval of total width 0.06. How large must your sample be? If total width is to remain same, but confidence set to 99%, how large must the sample be? If confidence level can be kept at 95%, but total width is to be halved, how large must the sample be?
Researcher is interested in testing whether there are differences in mean between population one and population two.
If garage is robbed, determine the probability doors were left open?
When the names of all the students at Omega University were dropped to a fishbowl, they would include:
Determination of Nominal, Ordinal, Interval, Ratio.Temperature is an example of what level of measurement.
Conditional and compound probabilities.The table below gives the distribution of blood types by gender in a group of 1000 individuals.
The standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was
If p is the probability of Event 1 and (1-p) is the probability of Event 2, based on the expected returns, for what values of p would you select A? B? C? Values in the table are payoffs.
In a binomial distribution n = 8 and π = 0.2. Determine the probabilities of the following events.
Romance USA present reported that 11 percent of all books sold are of the romance genre. If a local bookstore sells 316 books on a given day
The following data from a sample of 100 families show the record of college attendance by fathers and their oldest sons: in 22 families, both father and son attended college; in 31 families, neither father nor son attended college; in 12 families,..
Using the p- value approach, test the hypotheses at the 5% level of significance.
A bond analyst is analyzing interest rates for corresponding municipal bonds issued by two different states. At α = .05, is there a difference in interest rates paid by two states?
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