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Q1) Recognize the situation in which median rather than the mean is favoured measure of? Central tendency?
Q2) One question on student survey asks: In typical week, how many times do you eat at fast food restaurant? Following frequency distribution table summarizes results for a sample of n=20 students.
Number of times per week
f
5 or more
2
4
3
6
1
0
a) Determine the mode for this distribution.
b) Determine median for the distribution.
c) Describe why you can't calculate the mean number of times using data in the table.
If 50 cups of coffee were measured, what is the probability that: The sample mean per cup is less than 7.8 ounces?
The simple coefficient of determination is the proportion of total variation explained by the regression line.
At the 5% level of significance, does this result support the conjecture?
Organize data into a frequency distribution. How many classes would you propose? What value would you propose for class interval?
Make a graph to visualize the problem and state, without doing the calculations, whether the p-value of the test
The conservative degrees of freedom for the t distribution are and The standard error, conservative degrees of freedom
Construct a 90% confidence interval for the proportion of all kernels that would not pop.
Utilize the given degree of confidence also sample data to construct a confidence interval for population proportion.
Statistical Hypothesis test for the given sample
Test hypothesis that Site B is more successful in initiating acquaintances than Site A. Use alpha = .05.
Obtain a test statistic and p -value assuming equal variances. Interpret these results.
Test hypothesis that calories of two populations are equal. Illustrate all steps of the hypothesis testing process. Points will be deducted for missing parts.
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