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Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.
The percent defective for parts produced by a manufacturing process is targeted at 4%. The process is monitored daily by taking samples of sizes n = 160 units. Suppose that today's sample contains 14 defectives.
How many units would have to be sampled to be 95% confident that you can estimate the fraction of defective parts within 2% (using the information from today's sample--that is using the result that )?
What minimum sample size will be required if they want to be 99% confident that the sample proportion will not differ from the true population proportion by more than 5%?
The weight of cans of fruit is normally distributed with a mean of 1,000 grams and a standard deviation of 50 grams. What percent of the cans weigh 860 grams or less?
a company manufactures two products product a and product b. the wholesale price and manufacturing cost of each product
State the critical values for testing and what is the probability that this decision strategy will result in a Type I error?
To compare the effectiveness of three types of pain relievers, a homogeneous group of 22 students were divided randomly into three groups, and each group took one of three pain relievers for a period of 2 weeks.
what will be the standard deviation of the share price if it is assumed that there is a 95% probability that the value will be at least 64?
Describe when a z-test should be performed as opposed to a t-test? Which (if any) can we use all the time? Why or why not?
According to the Bureau of Labor Statistics (1996), the average price of a gallon of gasoline in all U.S. cities in the United States in January 1996 was $1.129. A later random sample in 24 cities found the mean price to be $1.24 with a standard d..
mr green harvested pumpkins for selling at four markets. he sold one-fifth of his crop at the first markey 40 at the
Obtain a test statistic and p -value assuming equal variances. Interpret these results.
The system will run successfully if any 3of them are functioning. Find the reliability of the system if the mission time is 8 hours. The life distribution of each component is given in the table.
which of the following is not a decision variable when formulating the project crashing problem as a linear program?the
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