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Test whether the gender distribution for theater goers from the general college by proportion test.
The student population at the stated college consists of 55% females and 45% males.
The college theater department recently staged a production of modern music. A researcher recorded the gender of each student entering the theater and found a total of 385 females and 215 males. Is the gender distribution for theater goers significantly different from the distribution for the general college? Test at the .05 level of significance.
A study of 40 bowlers showed that there average score was 186 the standard deviation of the population is 6. Find the 95% confidence interval of the mean score for all bowlers.
Draw a scatter diagram of the following bivariate data.
How large random sample of potential voters will be required to evaluate result with 95% confidence and with margin of error of plus and minus 3%?
Here are fifty observations on the weight of tea bags. Calculate the Standard Deviation and Variance.
What is the probability of obtaining 4 ones in a row when rolling a fair, six-sided die? Interpret this probability.
Using the simple test of independence (described in the lecture), decide if the events high calorie and high fiber are independent or dependent. Show your work.
Construct a scatter plot of P-RFM and P-HELM. If drawing the plot by hand, use graph paper to ensure accuracy.
An advantage of the permutation test over the t test for a difference in means, can Permutation tests be used for tests when we believe the two populations differ under the null hypothesis.
What reasons for complaints do you think the hotel should focus on if it wants to reduce the number of complaints? Describe.
Continuous random variable is uniformly distributed between a and b. The probability density function between a and b is.
A professor of math refutes the claim that the average student spends 3 hours studying for the midterm exam. Which hypothesis is used to test the claim?
Assume the population standard deviation is 1.2 hours. The standard error of the mean is:
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