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What are some other difference between test for independent groups and t test for matched groups? Do they both use the same set of assumptions? Why do we even need two different tests to analysis th
What is variable that affects others but is not being studied?
There are examples of deceptive statistics everywhere - visual data presentations (charts/graphs)-from magazines to newspaper articles. Locate a particularly outrageous chart/graph and interview peo
Develop the null and alternative hypotheses to determine whether the schedule adjustment reduced the average lateness time of 12 minutes.
Write the null for this: the average hemoglobin at admission less than 12.5. Is the mean enrollment hemoglobin for males different than the mean enrollment hemoglobin for females? (Null and Alterna
The best predicted pulse rate of a woman i=who is 69 in tall is ____ beats per minute.
At \alpha = 5%, is there a significant difference in proportion? Compute the p-value and round to 4 significant decimal places.
Assume that P1 is the Percentage of Lipitor users that developed infection. Test the hypotheses and compute the p-value rounded to 4 decimal places.
Based on the current sample, the standard deviation is equal to $21. Find a 90% confidence interval for the population mean level of spending per hour.
The coach takes a random sample of 43 players and finds the average number of free throws shot per practice was 225 with a standard deviation of 35. Construct a 99% confidence interval for the avera
In an examination of holiday spending (known to be normally distributed) of a sample of 16 holiday shoppers at a local mall, an average of $54 was spent per hour of shopping. Based on the current sa
Durations of clinical research studies awarded by a particular federal agency are assumed to follow a normal distribution, with a mean of 24 months and a standard deviation of 2.5 months.
What is the estimated regression equation? Perform a t test and determine whether or not x and y are related. Use α = 0.05.
A basketball coach wants to know how many free throws an NBA player shoots during the course of an average practice. The coach takes a random sample of 43 players and finds the average number of fre
A newspaper reports that the governor's approval rating stands at 69%. The article adds that the poll is based on a random sample of 726 adults and has a margin of error of 4%. What level of confide
Using MINITAB test the hypothesis that the voting patterns are similar across year in school. Use a=0.05. Identify the parameters
Construct the contingency table. Does this data suffest the side ffects of the drug and gender related? Use a=0.05
It is believed that 4% of children have a gene linked to juvenile diabetes. Researchers would like to test new monitoring equipment for diabetes. They hoped to have at least 20 children for their st
Should you use a binomial distribution? Please give a reason for your answer. In a random sample of students X is the number of hours a person studies.
Suppose that 6% of the apples on the truck don't meet the desired standard. What is the approximately probability that the shipment will be accepted anyway?
It has been stated that 75% of the population have a smart phone. If you randomly choose 10 people, what is the probability that at least 9 people will say they have a smart phone? Please show your
A shipment of assorted nuts is labeled as 45% walnuts, 20% hazelnuts, 20% almonds, and 15% pistachios by count. A random scoop of mixture had following counts.
Find and interpret the mean of the random varibale. Obtain the standard deviation of the random variable.
In a test of weld strength, 80% of tests result in a fracture in the weld,while 20% result in fracture in the beam. Let X denotes the number of failed trials that precede the 3rd beam fracture.
Let Y bethe num. of gallons ordered. Find the probability mass function of Y. Find the mean and varianceof the number of gallons ordered.