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Statistics

Type I and Type II error

Subject:

Statistics

Topic:

All Topics

Posting ID:

4425

OTA ID:

103060

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Interpretation of Data using SPSS (--provide detailed response)

I'm in the number crunching phase of some research. I had an advanced stats class two years ago, hence, the haziness on the interpretation end. I compiled the data from the Metropolitan Chicago Information Center (MCIC) and developed two hypotheses relative to data about residents' perception of crime in their neighborhoods for the years 1992 and 1996. Here are the hypotheses: Hypothesis 1 - If experience is the prime determinant of perception, males and females have similar experiences of crime in their neighborhood. Hypothesis 2 - If media exposure shapes perception, people with different education levels have different exposure to the media and should have different perceptions of... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

4433

OTA ID:

103314

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Determining the sampling distribution of a proportion.

According to a well-known newspaper journal, 58.3% of the 222,900 households in a particular county get the Sunday edition of the local newspaper. Suppose that random samples of 200 households are selected. In what proportion of the samples will between 55% and 60% of the households get the Sunday edition of the newspaper? P(0.55 < Ps <0.60) = P(-0.95 < Z < 0.49) = 0.5168 0.49 in the Cumulative Standardized Normal Distribution Table (= 0.6879) What are the specific steps involved in converting P(0.55 < Ps <0.60) to P(-0.95 < Z < 0.49)?

Subject:

Statistics

Topic:

All Topics

Posting ID:

4465

OTA ID:

101733

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7 multiple choice questions on normal distribution, confidence interval, critical values, F test, statistical significance, linear regression

1. Only two doctors would make a diagnosis on patients coming into the same STD clinic for gonorrhea. The probability of the two doctors making a diagnosis of gonorrhea is (independent, dependent, synergistic, cannot tell). 2. Assume that birth weights are normally distributed with a mean of 3400g and a standard deviation of 700 g. If you want to find the probability that a birth weight will be less than or equal to 2000 g you would first normalize and set up the equation as: 3. Which confidence interval has the most variability? a. (.0039, .0058) b. (.009, .0058) c. (1.20, 3.00) d. they all have the same variability 4. A test statistic was calculated to be -1.6/ You need to d... click for more

Subject:

Statistics

Topic:

All Topics

Posting ID:

4489

OTA ID:

103060

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Statistics/Phstat - Complete a decision tree and opportunity loss table

Purchase Price= 10 Selling price = 20 on Christmas day 2 otherwise Profit/loss 10 on Christmas day (8) otherwise a) Compute the payoffs for purchasing 100,200,500 or 1000 trees for each level of demand b) Set off the payoff table indicating the event and alternative course of action c) Set up a decision tree d) Set up an opportunity loss table

Subject:

Statistics

Topic:

All Topics

Posting ID:

4494

OTA ID:

103060

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