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Question: Suppose that a population has μ = 50 and σ= 10.
a) What is the Z value for x = 75?
b) What is the Z value for x = 40?
The next two questions refer to the following table where x= the number of days per week that 100 clients use a particular exercise facility.
X (# of days)
Frequency (# of people)
Cumulative Frequency
0
3
1
12
2
33
28
4
11
5
9
6
a. Complete the column of cumulative frequency
b. What is the 80th percentile?
c. Find the interquartile range.
d. Find the mean and standard deviation
A certain airplane has 2 independent alternators to provide electrical power. The probability that a given alternator will fail on a 1 hour flight is 0.02. What is the probability that (a) both will fail? (b) Neither will fail? (c) One or the othe..
A business owner decides to use a binomial distribution to solve one of his problems. He knows there is a 60 percent probability that he will sell one of his Red Oak floors to any customer who comes into his shop and views the wood.
what is the probability that the sample mean of IQ scores will not differ from the population mean by more than 2 points? (Round your answer to four decimal places.)
Use a data to obtain 95% confidence interval using your formula from Number 7. Does your interval contain the correct value?
Find the probability that the average diameter of those sand dollars is more than 2.707 centimeters. Assume that the variable is normally distributed.
The national average SAT score (for Verbal and Math) is 1028. Suppose that nothing is known about the shape of the distribution and that the standard deviation is 100. If a random sample of 200 scores were selected and the sample mean were calcula..
You have a standard deck of cards and you take out 2 cards at random. Let Y1 represent the number of red Queens in your sample and let Y2 represent the number of spades in your sample.
At the 0.05 level of significance, test whether the software package has reduced the average time it takes to complete deliveries.
Find the system reliability for each of the following.: (b) Which has the higher reliability? How could you configure a system of such relays to bring RS(t) up to 0.999?
Make a worksheet in Excel for your calculations. (b) Make a histogram of the data. Would you be justified in using a parametric t test that assumes normality? Explain.
A Russian SVR agent has 45 million dollars which he can spend to bribe academics, politicians, and bloggers to spread disinformation and to promote anti-American propaganda
The data collected was for each car for each type of fuel. Performance was measured in miles per gallon. Perform an ANOVA test and state the results.
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