Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Solved Assignments
Asked Questions
Answered Questions
Suppose that the middle 68% of families of a certain demographic monthly food expenditures fall between 293.45 and 315.73. Give an approximate estimate of the standard deviation of the expenditures.
How do you think researchers utilize test to show significance in research? For example f the independent test yield non significance but the matched yielded significant?
IQ data is thought to be normally distributed with a mean of 100 and a standard deviation of 15. The average IQ score of US college graduates is 115. Based on the give IQ data, what is the percenta
Is it possible to run both test for the same experiment? If so how or what situation would warrant such action?
What is the purpose of having two t test? why not just be able to conduct a t test for either independent or matched?
Finding if F is significant using the method that p<0.05 and F = 3.24 which then leads to p<.o5 and therefore F is significant. In finding so, we must reject the Null Hypothesis and accept the
If other factors remain constant, the larger the sample is, the more likely you are to obtain a significant value for the repeated-measures t.
Make a sketch of the IQ distribution and using the normal z chart, find the probability of having an IQ greater than 132. This is the minimum Standford-Binet IQ score required to join Mensa, The lar
Assuming that the company is advertising truthfully, what is the probability that the company will be investigated if the Department of Consumer Protection samples 5 clients?
IQ data is thought to be normally distributed with a mean of 100 and a standard deviation of 15. Using the emperical rule, what is the IQ range we would expect approximately 95% of the population to
Suppose you pay $2.00 for a raffle ticket for local organization raising money. The single winner recieves a $75 Home Depot Gift Card. A total of 200 raffle tickets are sold. What is your expected v
Suppose you were given the task of estimating the proportion of drivers in Troy, AL who text while they drive. Discuss what factors you must consider and how you would accomplish this. Don't forget
If a couple consists of a non-albino and an albino, what is the probability that their offsping will be albino? Suppose that a couple consists of two non-albinos. They have two offsprings. What is th
Based on new water standards for manufacturers in the region, they wanted to see if there was a change in contamination in crayfish. What are the appropriate null and alternative hypotheses? (NE mea
A hypothesis test for a population proportion p is given below: Ho: p = 0.25 vs. Ha: p NE 0.25 (NE means not equal) For sample size n=100 and sample proportion p = 0.30, compute the value of the tes
A hypothesis test for a population proportion p is given below: Ho: p = 0.25 vs. Ha: p NE 0.25 (NE means not equal) For sample size n=100 and sample proportion p = 0.30. What is the p-value for the
Compute the standard error of the estimate for the data below. Round to the thousandths place.
A hypothesis test for a population proportion p is given below: Ho: p = 0.25 vs. Ha: p NE 0.25 (NE means not equal) For sample size n=100 and sample proportion p = 0.30. What is the critical value f
The researchers wanted to see if there was a change in contamination in crayfish. What is the test statistic for this problem? (use 2 decimal places)?
A research engineer for a tire manufacturer is investigating tire life for a new rubber compound and has built 16 tires and tested them to end-of-life in a road test.
The meat department of a supermarket sells ground beef in approximate 1 lb packages, but there is some variability. A random sample of 65 packages yielded a mean of 1.05 lbs and a standard deviation
In a recent survey of 205 never-married single women, 78% thought they would eventually find, and marry, their perfect mate. A 95% Confidence Interval for this proportion would be .78 plus or minus
What is the probability that the average duration is between 7 and 9 years? (Hint: think of this problem in terms of a sampling distribution with n =81).
The previous analysis of paper boxes showed that the standard deviation of their lengths is 15 millimeters. A packer wishes to find the 80% confidence interval for the average length of a box. How