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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
College students often make substantial portion of population of college cities and towns. State College, Pennsylvania, ranks first with 71.1% of its population made up of college students. Determin
How do you distinguish between the two main effects & the interaction in the structure of a Two-factor analysis?
Day care centers in large cities like New York and San Francisco are notoriously expensive. Assume that day care costs are normally distributed with a mean equal to $9,000 and a standard deviation e
Explain a condition in your past professional or personal experience in which a hypothesis test may have proven useful. What null and alternative hypotheses would you test? What kind of test would
Once the linear regression model is developed, it can be used to make predictions for any values of the dependent variable or variables. Why is it not appropriate to do that?