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A Pew Internet and American Life Project 2007 report stated that 74% of teenage boys posted their photo on their online profile, while 83% of teenage girls did so. Assume that the sample sizes were each 500. Test whether the proportion of teenage boys posting their photo in their online profile differs from the proportion of teenage girls who do so.
a) State the null and alternative hypothesis.
Ho:________________ Ha:________________
b) Calculate the test statistic.
c) Determine the p-value.
d) At a significance level of 5%, what is your conclusion? Explain in context of the problem
What effect has the transformation had on the lowest exam mark and what effect has the transformation had on the highest exam mark - STATS 201/8 Data Analysis
Two strategies over the 6-year period. Create a histogram of the final fund values. Based on your simulation results, which of the two strategies would you recommend? Why?
Sample standard deviation s=4.8. what is a point estimate off the difference between mean annual consumption in Webster City and the national mean?
The price of XYZ Corporation stock is normally distributed all through the year with mean of $42.00 per share and a standard deviation of $2.25 per share. Suppose that the stock is traded 240 days out of the year.
A special test is given to people complaining of sever headaches. if someone has a brain tumor, the test is positive with a probability of .8 (80%).
Test the following hypotheses using the Traditional Method. You must show all the steps involved and the final statement must be phrased appropriately for the problem.
The distance is recorded for each hit, and the results are shown below, organized by brand. Carry out a complete analysis using ANOVA and a 5% significance level.
Determine the coefficient of correlation between the two variables. Interpret the value.
Assume the probability that a person has the desease is 0.03 for all people, independently of each other. Compute the total expected number of tests necessary.
questiona jonka tries to connect to his internet service provider. the probability that he connects on any single
the owner of the doughnut shop has been paying attention to the number of customers who come through the shop. she has
Fixed costs of $9,200 per month and variable costs of 70 cents per unit produced. Each item is sold to retailers at a price that averages 90 cents.
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