Stats Help for College-level Students

Null and Alternative Hypothesis

Multiple Choice: All of the following are possible hypotheses surrounding nominal data except: a. The percentage of people favoring brand A is greater than the percentage favoring brand B. b. The average income of electricians exceeds the average income of carpenters. c. The number of households with term life insurance e ...continues

Probability distribution and hypothesis testing

There are 4 entrances to a building in Philadelphia. The bldg maintenance super would like to know if the entrances are equally utilized. To investigate, 400 people were observed entering the building. The number using each entrance is reported below. At the .01 signficance level, is there a difference in the use of the four ent ...continues

Hypothesis testing

It has been suggested that daily production of a subassembly would be increased if better portable lighting were installed and background music and free coffee and doughnuts were provided during the day. Management agreed to try the scheme for a limited time. The number of subassemblies produced per week by a sample of employee ...continues

Hypothesis testing

Hypothesis testing question - see attachment

Chi square test and hypothesis testing

A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information. At the .01 significance level, is there a relationship between job pressure and age? See attachment

Probability/Confidence Level

1) Megacorp wants to determine whether the mean of all one-day travel expenses in Moscow exceeds $500. A simple random sample of 35 one-day travel expenses is obtained from Megacorp travel expense files. The average one-day Moscow expense was found to be $538 with a standard deviation of $41. a) Calculate the probability of ...continues

Word Problem

Regression questions

Statistics

Directions: Test the following hypotheses using the Traditional Method. You must show all the steps involved and the final statement must be phased appropriately for the problem. 1. From past records, a hospital found that 37% of all full-term babies born in the hospital weighed more than 7 pounds 2 ounces. This year a samp ...continues

Statistics

4. A statistician claims that the average score on a standardized test of students who major in psychology is greater than the average of students who major in mathematics. The results of the test, given to 50 students in each group, are shown below. Is there enough evidence to support the statistician's claim at a 1% level of ...continues

Statistic problem: Hypothesis Testing of running shoes

Directions: Test the following hypotheses using the Traditional Method. You must show all the steps involved and the final statement must be phrased appropriately for the problem. A sports-shoe manufacturer claims that joggers who wear its brand of shoe will jog faster than those who don't. A sample of eight joggers is take ...continues