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To determine whether extra personnel are needed for the day, the owners of a water adventure park would like to find a model that would allow them to predict the day's attendance each morning before opening based on the day of the week and weather conditions. The model is of the form
a. Interpret the estimated model coefficients.
b. Is there sufficient evidence to conclude that this model is useful tor the prediction of daily attendance? Use a = .05.
c. Is there sufficient evidence to conclude that the mean attendance increases on weekends? Use CY = .10.
d. Use the model to predict the attendance on a sunny weekday with a predicted high temperature of 95°F.
e. Suppose the 90% prediction interval for part d is (645,1,245). Interpret this interval
Group suspects that local shopkeeper's 10g packs is actually less than wt. The group took sample of 40 whose mean wt is 9.95 and s.d. of 0.15. Find p-value for the test of hypothesis.
Simulate 500 independent standard normal values. Use these to generate 250 pairs of bivariate normal vectors .Xi ; Yi /, with zero means, unit standard deviations, and correlation p D :25; :5; :75. Use your sim- ulated pairs to estimate P.X > 0; Y > ..
Is there an increasing or decreasing pattern? Explain what that means in terms of height and shoe sizes. Calculate the correlation coefficient, r. (3 decimal places)
the central limit theorem says that when a simple sample of size n is drawn from any population with mean ? and
Any person who is familiar with these trees understand the height of a California redwood tree which is related to another characteristics of the tree.
From the test data, can we determine whether the oven has an effect on the cake's density? The null hypothesis should be: Oven has no effect on density.
A manufacturer claims that the life span of its tires is 49,000 miles. You work for a consumer protection agency and you are testing these tires. Assume the life spans of the tires are normally distributed. You select 100 tires at random and test ..
suppose you were given the task of estimating the proportion of drivers in troy al who text while they drive. discuss
which of the following is true for a symmetrical distribution?a. mean modeb. median modec. the mean median and mode
It costs ABC $0.5 per pound to ship the box containing the weights. Because it's an odd-shaped package, though, shipping the bar costs $0.6 per pound plus a $10 surcharge. Find the mean and standard deviation of the company's total cost for shippi..
Time closely follows a normal distribution with a mean of 500 seconds and a standard deviation of 72 seconds. What percent of kiosk users take between 600 and 720 seconds?
State the hypotheses that can be used to determine whether the population proportions of delayed departures differ at these two airports and what is the point estimate of the proportion of flights that have delayed departures atChicago O'Hare?
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