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A population of 1,000 students spend an average of $10.50 a day on dinner. The standard deviation of the expenditure is $3. A simple random sample of 64 students is taken. What is the probability that these 64 students will spend a combined total of more tahn $715.21? What is the probability that these 64 students will spend a combined total between $703.59 and $728.45?
Alternative C would have fixed costs of $100,000 and variable costs of $15 per unit. Revenue is expected to be $50 per unit. Which alternative has the lowest break-even quantity?
If you are using the method of least squares for fitting trends in an annual time series containing 25 consecutive yearly values.
If a class of 30 students is chosen at random from the university population, find the mean and variance of the number of male students.
Suppose that we observe a random sample size n from a normally distributed population. If we are able to reject H0:µ = µ in favor of a two-tailed alternative hypothesis at the 10% significant level
John conducted his study to measure self-esteem among victims of domestic violence before and after they complete an 8-week program for abuse victims with 10 individuals.
How large should the sample size be if she wishes to be accurate within $0.10. A previous study showed that the standard deviation of the price was $.12.
Determine the following: the three different types of shows you want to compare; the mood you will measure and how you will measure it; what you think will happen-how you think each group will score on the mood measure you use.
For a sample of 138 independent observations from a normal distribution of unknown μ and variance σ 2 = 2.6, the sample mean is 52.3. What is the width of the 95% confidence interval for μ?
An independent second stage is normally distributed with a mean of 43 minutes and variance of 10 minutes. What is the probability that the two stages take over 80 minutes?
Compute the test statistic. Use the t distribution table to compute a range for the p value. What is the rejection rule using the critical value? What is the conclusion?
Computing the probability values using normal distribution - The data set has a bell-shaped distribution. Between what two prices do 68% of the houses lie?
The manager of a local branch of a bank believes that over the past few years the bank has begun to cater to a different clientele and that the average amount withdrawn from its ATMs is no longer $140.00.
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