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Below are two groups:
A: 15, 22, 19, 25, 16
B: 32, 25, 27, 33, 21, 35, 30
a) Test to see if the variances are the same: give the null and alternate hypotheses; then the test statistic and critical value; finally decide if you accept or reject this null hypothesis at the 5% level.
b) Now do the same for the means of the two groups.
Determine the coefficient of determination for this regression problem and comment on its capability to predict outcome.
When it comes to advertising, "'tweens" are not ready for the hard line messages that advertisers often use to reach teenagers. The Geppeto Group study found that 78% of 'tweens understand and enjoy ads that are silly in nature.
Consider a finite size population for N in which you want to study a variable y that takes a very small value for the first element of the sampling frame
Illustrate what can we say about the probability distribution. Is it approximately normal, elucidate the mean and standard deviation.
Conduct a one-tailed hypothesis test given the information below. A certain brand of Green Energy light bulbs was advertised as having an average illumination life-span of 2,500 hours.
in examining the ability of users to complete a variety of information-seeking tasks on their mobile devices nielsen
suppose it is known that 45 of the population are coalition voters 45 are alp voters and 10 vote for greens. suppose it
Jolt agrees to replace any connector that fails within 19 months. Out of 500 connectors sold, how many does Jolt expect to replace on average?
You have been asked to develop a study of the effects of watching Sesame Street on childrens' gender role orientations, intelligence, or sociability.
Show that marginal cost and marginal revenue are given by? Show that the profit maximizing quantity which equates marginal revenue and marginal cost is?
Suppose that 20% of the homes in a neighborhood has a swimming pool in their backyards and 50% has a garage. 15% of homes have both a garage and a swimming pool.
A firm has tendered for two independent contracts. It estimates that it has probability 0.4 of obtaining contract A, and probability 0.1 of obtaining contract B. Find the probability that the firm:
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