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Assume that the smiling time of eight-week old babies, in seconds, follows a uniform distribution between 0 and 23 seconds, inclusive. This means that any smiling time from 0 to and including 23 seconds is equally likely.
Let X = length, in seconds, of an eight-week old baby's smile.
What is the probability that a randomly chosen eight-week old baby smiles between 2 and 18 seconds?
Compute a 95% confidence interval for the mean using the formula and where is the mean of the ten random numbers.
Otherwise you lose $1. If you make this wager very many times, what will be the mean outcome?
What is your conclusion regarding null hypothesis?
The alternative hypothesis is true. In this case the consumer advocacy group will have, A consumer advocacy group doubts this claim and tests the hypotheses
Assume 1.5% of antennas on new Nokia cell phones are imperfect. For random sample of 200 antennas, determine the probability that: None of the antennas is defective.
Write the null and alternative hypotheses you would use to test the following situation.
To select a _________ sample, an intact group of subjects that represent the population is selected.
In which category is ANOVA properly classified?
State the appropriate set of hypothesis to test whether there is a relationship between the variables X and Y.
If one person is selected at random, what is the probability that person is Female?
Using part(a), explain to investor differences between distribution of performance figures for the 2 kinds of stock funds.
Which is the probability that the median of the sample is between $17 and $20?
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