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One hundred School children spent the day at Wally World, a poplar amusement park. Parents gave each child $20 for food, with orders to return the unspent funds at the end of the day. The lemon-lime gelato at the concession stand is quite popular with children, and, in fact, the children found no other item of food worth buying. A survey conducted on the bus on the way home revealed that children bought a mean of 2.3 gelatos, with a standard deviation of 0.6 gelatos. If a gelato sells for $2.50, find the sample mean and sample standard deviation for the amount of unspent money returned at the end of the day.
A random variable X is normally distributed with mu = 60 and standard XXX = 11. What is zscore for X = 71
If x is a binomial random variable where n = 100 and p = .1, find the possibility that x is less than or equal to 10 using the normal approximation to the binomial.
Based on this sample information, create a 90% confidence interval for population mean yearly premium.
Determine the distributions given below represent a probability distribution. Justify your answer.
Martin Motors has in stock three cars of the same make and model. The president would like to evaluate the gas consumption of the three cars (labeled car A, car B, and car C) using four different types of gasoline. For each trial, a gallon of gaso..
Would it be reasonable to conclude that the 5 percent of the employees are not able to pass the random drug test?
Determine the mean and standard error of the x - bar distribution.
Assume that the following four examines were tested as part of a large group that had a normally curved distribution.
Evaluate the standard deviation - use the conservative value for the degrees of freedom, Assume the two groups are independent and the data are approximately Normal. Let µ 1 and µ 2 represent the mean heart rates we would observe for the entire po..
The null hypothesis is to be tested at the 10% level of significance. The critical value from the table is:
Use relative frequencies to estimate the probability that a seed will germinate, What is your estimate?
What is the probability of a fatal accident over a lifetime?
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