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Discovering Statistics: Referring to the information from my first question as stated; Nielson Media Research reported that, for the week, ending July 11, 2004, 12 million viewers watched the television show 60 minutes. Suppose that the distribution of viewers of 60 minutes is normal with mean µ = 12 million and the standard deviation σ = 4 million.
a. Find the number of viewers that represents the 75th percentile.
b. On one particular night, 24 million people watched 60 minutes. Is this unusual? On what do you base your answer?
The following time series data represent the yearly amounts spent on advertising (in millions of dollars) by a large toy company:
At the 5% level of significance, is there evidence of a difference among the mean access read times for the three files sizes?
Solve the problem: According to police sources a car with a certain protection system will be recovered 94% of the time. Find the probability that 4 of 8 stolen cars will be recovered.
A random sample of 30 students was selected, and the following values were recorded: Is this sample significantly different than the population? State the null and alternative hypotheses.
Four research participants take a test of mannual dexterity (high scores mean better dexterity) and anxiety test (high scores mean more anxiety). Scores are as follows:
You are running a chi-squared test. You have 2 groups with 3 characteristics each, what would your critical value be with an alpha of .025?
What proportion for smoking teenagers think their peers care a lot about keeping their weight down?
Further support that 51.3% of births are male. What is the probability that a randomly chosen child will be affected by the disease.
Determine point estimate of population mean? By using 90% confidence, determine the margin of error?
In a non instanteneous receipt model, daily demand is 55 units and daily production is 120 units, Co=$70 and Cc=$4 per unit per year. What is the maximum inventory level?
Mean and standard deviation for new sample were then computed to be M _ 6 and s _ 3. Write down the values of mean and standard deviation for original sample?
Compute the sample variance and the sample standard deviation for these data (to 2 decimals).
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