Stats Help for College-level Students

2 True and False questions on hypothesis testing

1) For any hypothesis test, if the value of a parameter being tested falls outside the confidence interval for the same level of a, the correct decision is to reject the null hypothesis. Is this True or False? 2) Irrespective of whether a two-tail or one-tail test is being conducted in order to compare two population means, t ...continues

Null and Alternative Hypothesis

Given a two-tail test for the population mean, the null hypothesis contains a(n) __________ sign, and the alternative hypothesis contains a(n) ___________ sign. a. ¹, = b. =, ³ c. £, = d. =, ¹ Use the following information for questions 3 - 5. The Waterhole bar and grill decided to run a special offer of a fr ...continues

Probability

There are 5 pairs of shoes with distinct size. Now choose any 4 from it randomly, find the probability that they form at least a pair.

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