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Since the population proportion is not specified, it is common practice to use 50% in tis place. You cannot define the population proportion as 25% for problem 1-5..
A company claims to have invented a hand-held sensor that can detect the presence of explosives inside a closed container. Law enforcement and security agencies are very interested in purchasing several of the devices if they are shown to perform effectively. An independent laboratory arranged a test. They placed four empty boxes in the corners of an otherwise empty room. For each trial they put a small quantity of an explosive in one of the boxes selected at random. The company's technician then entered the room and used the sensor to try to determine which of the four boxes contained the explosive. The experiment consisted of 50 trials, and the technician was successful in finding the explosive 16 times. Does this indicate that the device is effective in sensing the presence of explosives?
1.Specify the parameter(s) in question. What type of hypothesis test will be used?
2.Write the null and alternative hypothesis using appropriate symbols.
3.Determine the test statistic showing the work for the formula.
4.Specify the p-value and what it represents in the problem using the appropriate probability distribution.
5.Interpret your results. (Explain clearly how the decision is made in terms of the null hypothesis and give a conclusion in context.)
Let i be an integer with 1
How many bit strings of length n are palindromes? Hint: Consider two cases n is even and n is odd. Note a palindrome is a "string" of letters or numbers which read the same frontwards and backwards.
Explain how you decide whether it is easier to solve a system by substitution or the elimination method. Response should be detailed and include an example
You are told that a line is tangent to the circle centred at (3,2) with radius 2. If the tangent line and circle intersect at the point (4, 2+ sqrt(3)) find the equation of the tangent.
Gavin and Seiji both worked hard over the summer. Together, they earned a total of $425. Gavin earned $25 more than Seiji. How much did each of them earn?
What proportion is between 150 and 140 centimeters
Problem on correlation coefficient
Define an intercept in a parabolic graph. What are the number(s) of intercepts a quadratic graph may have? Explain your answer/ diagram etc. How do you compute the intercepts in a quadratic function?
Write equations for the vertical and the horizontal lines passing through the point (-7,5) in (x,y)-coordinates.
The equation x - 3 ln x = 2 has exactly two solutions A and B, with 0
Use decision tree diagram to solve the problem.
Perform the operation and make the result in standard form
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