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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?
At the .01 significance level, can we conclude that the 30-yeer mortgage rate for small banks is less than 6 percent? Estimate the p -value.
From the given probability distribution finite the mean and standard deviation.
In our discussions of basic probability theory the concepts of mutually exclusive events and independent events share prominent roles.
Banner Mattress and Furniture Company wishes to study the number of credit applications received per day for the last 300 days.
In a random sample of 184 college students, 97 had part-time jobs. Find the margin of error for the 95% confidence interval used to estimate the population proportion.
Can you test the significance of the relationship between physical activity level and systolic blood pressure, adjusting for age, and weight, given the ANOVA table above?
Her students this semester can be considered a sample from the population of all students she might teach, so she compares their mean score with 72.
In the last quarter of 2007 a group of 64 mutual funds had a mean return of 0.9% with a standard deviation of 5.2%. Consider the normal model N(0.009.052) for the returns of these mutual funds.
The number of ferromagnetic artifacts for each plot is determined. The variable in this information is number of ferromagnetic artifacts per 100 square meters.
The following frequency distribution shows the time (in minutes) that a sample of students uses the computer terminals per day. Compute the coefficient of variation.
The MacBurger restaurant chain claims that the waiting time of customers for service is normally distributed, with a mean of 3 minutes and a standard deviation of 1 minute.
Find out the value of correlation coefficient. Make a regression model to predict winning percentage utilizing all of the data.
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