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Using the command RANDBETWEEN in Excel, generate 100 random numbers between 24 and 48, then label it as Population 1. For population 2, generate 100 random numbers between 21 and 49, and for population 3, generate 100 random numbers between 19 and 45.
For each sample data generated
a. Find the sample mean and sample variance.
b. Present in tabular and graphical forms the sampling distribution of x
c. Find E(x) and var(x)
d. Compute the standard error of x?
e. Find the probability that the sample mean is within one standard error away from the population mean?
A store asked 250 of its customers whether they were satisfied with the service or not. The responses were also classified according to the gender of the customers. We want to study whether there is a relationship between satisfaction and gender.
What is the independent variable and what are its levels? What is the dependent variable?- Is this a between-groups or within-groups design? Explain.
Construct a scatterplot and verify that estimating a simple linear regression is appropriate in this problem.
One player selects four pegs, each peg having six possible colors, and places them in a line. The second player then tries to guess the sequence of colors.
When the experiment is performed many times, the chain ends in state one approximately 20 percent of the time and in state two approximately 80 percent of the time. Compute a sensible estimate for the unknown parameter p and explain how you found ..
To study whether or not pressure exerted on the upper arm increases bleeding time, 39 persons had their upper arm subjected to a pressure of 40 mmHg of mercury.
Determine the conditional distribution of the number of registered signals given the number of transmitted signals, that is, compute P (Y (t) = k | X(t) = n) for suitable choices of k and n.
Where S, A, and R are measured in dollars per week. Vanguard's marketing director is comfortable using parameter estimates that are statistically significant at the 10% level or better.
Forecast the number of deliveries utilizing exponential smoothing constant for different values also compare it. A hospital records the number of floral deliveries its patients receive every day.
A fisheries biologist who had to estimate the number of prawns in two aquaculture ponds chose three locations at random within each pond and deployed
the average price of homes sold in the u.s. in the past year was 220000. a random sample of 81 homes sold this year
(a) What is the maximum height above the ground the cannonball reaches? (b) What is the speed of the cannonball just before it hits the ground?
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