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Perform appropriate statistics for each of the following variables in the data file "binge.save" 1) age, 2) gender, 3) race, and 4) class. The choice of statistics should be either percentage with bar chart (for categorical/discrete variables), or the mean and standard deviation for continuous/ratio variables. For categorical variables, you should create a chart.
Write a brief summary report on the demographic and class distribution of this sample. Paste the tables and charts into your report and label each of them properly. Statistics should follow a general statement in parentheses as supporting evidence.
Example 1: A majority of the survey respondents are married (married = 68%, single = 32%).
Example 2: Table 2 summarizes the income distribution of the sample. The average household income of this group is $55,000 with the standard deviation = $6,700.
Calculate p value? What is the critical value?
Angela works as a quality supervisor. She has uncovered a quality issue with safety brackets on baby swings. Angela determines that 21% of the safety brackets are out of spec.
IQ scores but have been standardized so that complete sample has mean of M = 10 and standard deviation of s = 2. Compute mean and the standard deviation for the sample of n = 8 females and for sample of n = 8 males.
Use the F test of ANOVA (assume α = 0.05) to decide whether or not there are any differences in true average lumen outputs between the three brands for this type of light bulb.
The number of UFO (Unidentified Flying Object) sightings per week in Roswell, NM is a random variable with the cumulative distribution function given below.
In a sample of 20 men, the mean height was 178 cm. In a sample of 30 women, the mean height was 164 cm. What was the mean height for both groups put together?
A manager receives a forecast for next year. Demand is projected to be 600 units for the first half of the year and 900 units for the second half.
This confidence interval can't be trusted to give information about the spending plans of all adults. Why not?
Test whether the mean weight is greater than 16 ounces with P-value approach.
What is the probability that a random person has an IQ between 85 and 115? Find the 90th percentile of the IQ distribution.
Compute the Kappa statistic and its standard error reading reproducibility of the diagnosis of dyspnea in this clinic.
Suppose that a random sample of 14 cars shows an average speed of 24.0 mph, with a sample standard deviation of 2.2 mph. Assume that the speeds of cars are normally distributed. Using the T-table, what is the p-value?
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