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Historically, a production line produces 6% defective items. The production supervisor takes sample of 100 items frequently and if he finds 8 or more defective products, he stops the line to make a
A study regarding the students graduating in 4 years of their entrance to the universities indicated that 62% of the students don't graduate within 4 years. Assume a random sample of 500 students wa
According to the newly published report approximately 43% of adults say filing their tax paperwork is worse than the trip to the dentist. If a random sample of 200 is chosen, the probability that at
A new Rasmussen Report national telephone survey finds out that just 32% of American Adults favor "sin taxes" on soda and junk foods. The survey was based upon a sample of 1,000 American Adults. Bas
According to a current news report, the average price of gasoline is $3.80 per gallon (March 2011). This price can be considered as the nationwide population mean price per gallon. Assume that the s
From 100 homes of similar sizes, sample of 25 homes is chosen to study the average home heating cost throughout the winter months. Assume the heating cost is known to be normally distributed with me
Assume a random sample of 36 items is chosen from a population. The population standard deviation is known to be 10. The standard error of the mean would be:
Assume there were 2500 greeting cards in the store's inventory. How are the results in (a) useful in assisting the store owner to Determine the total value of the inventory?
Assume we have a set of blood pressures with mean of 70 Diastolic and a sample standard deviation of 10 points. Supposing a normal distribution between what two values should 95% of all Diastolic b
A magazine claims that 25% of its readers are college students. Of random sample of 200 readers, 42 are college students. Employ a .10 level of significance to test Ho: p = .25 and Ha: p not equal t
Which form of the hypotheses should be employed to test the companies claim?
A research hypothesis must be stated as the_____________ hypothesis. A claim should basically be stated as the_____________ hypothesis. In a decision-making condition, the null hypothesis will be s
Given a one independent variable linear equation that states cost in $K, and given the following information, calculate the standard error and determine its meaning.
What is the minimum sample size required, using a prior study that found that 52% of respondents said they have high-speed Internet access.
On average I see one aircraft in sky every three hours throughout a day. If I watch for , 11 hours a day. Determine the probability that I will catch at least 6 plane throughout the day?
Soft Drink Taste Test A soft drink company wishes to introduce a new soft drink. The company is considering two flavors, lemon lime and cherry cola. In a sample of 125 people, it was found that
Using correct mathematical notation and symbols, express the following in set-builder notation: Z = {4, 5, 6, 7, 8, 9, 10, 11}.
There are two kinds of claims that are made to an insurance company. Let Ni(t) denote the number of type i claims made by time t, and assume that {N1(t), t > 0} and {N2(t),t > 0} are indepen
Give me a null hypothesis that would employ a t test statistical analysis. Use the same hypothetical situation taken in the t test hypothesis, and turn it into a null hypothesis using a one way ANOV
Post one separate item that is a question you've regarding a current or previous concept. Put the word Question in the subject line, along with the the idea or Topic number or page number.
Consider the following condition and comment on whether the sample results may cause concern regarding the quality of the process.
A researcher takes a sample and desires to compare the results to population from which it was drawn. The independent variable is "gender" and dependent variable is a yes/no response to whether they
An independent-measures research study employs two samples, each with n = 12 participants. If the data produce a t statistic of t = 2.08, then which of following is the correct decision for two-tail
The probability that a missile fired against a target isn't intercepted by an anti-missile missile is 2/3. Given that the missile hasn't been intercepted, the probability of successful hit is 3/4. i
What is a model that reflects the relationship between red blood cell count and the two independent variables (exercise and iron supplements)? assuming that the effect of the iron supplement depends