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Q1) 80 % of illegally parked cars in large city get tickets. Sample of 100 illegally parked cars is taken
a) Determine the expected percentage of tickets issued to these 100 cars?
b) Find out the variance for percentage of tickets?
c) Find out the probability that 75% or more cars get ticketed
d) Find out the probability that the percentage of tickets issued is between 68% and 82%?
Q2) A statistics class has 282 students. Average score on midterm is a 72, and standard deviation of this population of students is 12. Suppose that grades are normally distributed. You take sample of 20 students. Determine the probability that your sample will have the average between 70 and 75?
Compute β-error of test in part (a) if true difference in mean burning rate is 2.5 centimeters per second.
The Minitab output for the Tukey Least Significant Difference multiple comparisons is below. Which means are different and similar
Solve different inventory control problems using an appropriate OR method.
Conduct a statistical test to determine if the sample is representative of the population.
A sample of n observations is taken from a population. When performing statistical inference about a population variance, the appropriate chi-square distribution has:
Find the probability of getting a head and rolling a six
Ninety of the sample students are in the Business College, 120 are in the Liberal Arts College, and 90 are in the Education College.
What is the likelihood the sample mean is greater than $22.50 but less than $25.00?
Describe the sampling distribution model of this mean.
What is the standard deviation of expected returns for Stock X? For Stock Y?
If the estimate is to be within 8 mpg of the true mean with 98% confidence and the estimated standard deviation is 22 mph, how large a sample size must be taken?
Use suitable one or two sided test for null hypothesis of no difference in them then changes rating between groups at 0.10 significance level.
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