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If you wish to determine there is evidence that average starting salary for finance graduates exceeds $42,000, then you should formulate the null and alternative hypotheses such that
a. either a two-tailed or one-tailed test could be used
b. a two-tailed test should be used
c. a one-tailed test should be used
d. the probability of committing a Type II error equal to .42
problem 1 - of a random sample of 600 trucks at a bridge 114 had bad signal lights. construct a 95 percent confidence
beechwood specialty electronics has just leased space for a store in the crestview hills towne center that will provide
A cell phone company collects data from a random sample of 500 households. The results indicate that 135 of the households would add an extra cellular number, provided it was offered at a reduced monthly cost.
The cell phone industry is growing at a rapid pace. Current estimates suggest that 60% of people have cell phones. Suppose 25 people were randomly and independently sampled.
The number of degrees of freedom for the appropriate chi-square distribution in a test of independence is:
Compute 95 percent confidence interval for mean percentage share of billing volume from network television for population of all US advertising agencies.
To test whether the significant difference between two sample variance using F-tests.
The following examples are experiments and their associated random variables. In each case identify the values the random variable can assume and state whether the random variable is discrete or continuous:
We will select a random sample of 8 cigarettes and conduct a hypothesis test at the 10 % level of significance to determine whether the true mean nicotine content of all cigarettes differs from 8.4 mg.
suppose you want to test the claim that mu!=3.5 with standard deviation unknown. Given a sample size of n = 40 and a level of significance of alpha=.05, when should you reject H0.
kyle averages 5 finished accounts per day. his standard deviation is 1 account per day and we want to know how many accounts he has to finish in a day to be at his 79.95 percentile
what critical value t should be used to calculate the margin of error for a confidence intervalfor the mean of the
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