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What is standard deviation of the sampling distribution of the sample mean. use the central limit theorem to find the approximate probability that the mean number of flaws exceeds 1.8 per square yar
What is the probability that a brand manager in Houston has a base salary in excess of $100,000?
At a used book sale, 100 books are adult books and 160 books are children's books. Seventy of the adult books are nonfiction while 60 of the children's books are nonfiction. If a book is selected at
Bellevue Hospital in New York City uses 100.6 °F as the lowest temperature considered to indicate a fever. What percentage of normal and healthy adults would be considered to have a fever? Does
Ten different people's income tax returns are done by each of the three software packages and the time is recorded for each. Which of the following is true?
Of the bolts manufactured for a certain application, 90% meet the length specification and can be used immediately, 6% are too long and can be used after being cut, and 4% are too short and must be
A student taking Management Science 301 at East Haven University will receive one of the five possible grades for the course: A,B,C,D, or F. The distribution of grades over the past two years is as
Mary is choosing a pair of running shoes. In her size, the running shoes come in four different styles and six different colors. How many different pairs of running shoes can Mary choose from?
The probability that he passes both finals is .60. What is the probability that the student will pass at least one of these final examinations?
A recent study of 25 students showed that they spent an average of $18.53 for gasoline per week. the standard deviation of the sample was $3.00. find the 95% confidence interval of the true mean.
At the 0.01 level of significance can it be concluded that the proportion of recorded grievances handled and recorded correctly at the lowest level possible has increased?
The 6 participants in a weight-loss class lost the following weights (in pounds) after three weeks of dieting:
What can you say about the means of the sample with respect to the population mean?
The manufacturer of a new chemical fertilizer guarantees that, with the aid of the fertilizer,70 % of the seeds planted germinate. If we believe the manufacturer's assertion, what is the probability
If the company bases monthly on the expected value of the monthly demand, what should Dakota's monthly order quantity to be for this product?
If you must estimate the population mean within 2 days, how many outside salespeople should you sample? Use the 90 percent confidence level.
The yield strength of a metal bolt has a mean of 6,050 pounds with a standard deviation of 100 pounds. Twenty samples of three bolts were tested, resulting in the means shown below. (a) Construct up
if its known that the variance of the length of life of electric light bulbs is 2,500, and if we obtain a mean life of 500 hours for a sample of 25 bulbs, determine a 95% confidence interval estimat
If researchers want to take a new sample of size 55, what will be the standard deviation of the distribution of the sample mean?
At alpha= 0.05 can it be considered that the ages of the automobiles are equally distributed among the three categories? what would the results suggest to a tire manufacturer?
At the 0.01 significance level, is there a difference in the mean number of times men and women order takeout dinners in a month? Calculation of the p-value is not required.
A contractor is considering a sale that promises a profit of $31,000 with a probability of 0.7 or a loss (due to bad weather, strikes, and such) of $13,000 with a probability of 0.3. What is the ex
Assume that we can consider these 67 accidents as a random sample of all accidents. If the politician is correct, what is the chance that you would observe 9 or fewer accidents with a teenager behin
24% of the students in the sample received and A. At the 1% signifiance level, the test hypothesis that more then 20% of the students received and A.
A sample of 100 $1.00 bills from a Subway cash register revealed that 16 had something written on them besides the normal printing. At significance level of 0.02, is this sample evidence consistent