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Determine the analysis and state the null and alternate hypothesis.
Determine what analysis would you do on each problem (i.e., one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)? Then state the null and alternative hypothesis for a problem.
Suppose you have developed a new program to stop teens from smoking. You try out the program on high school seniors and then find out how many of them started to smoke. You believe that the proportion of students smoking will be less than the current value of 23.
If Kim expects to use phone for 21 hours per month, which plan must she choose?
Calculate sample proportion and then also calculate a 99% confidence interval for true population proportion, p.
Using the .05 significance level, can we conclude that there is a positive association between the two variables?
An experiment was performed to investigate lifetime of a component exposed to high heat. Three different oven types were used at either 550°F or 600°F.
By constructing null and alternative hypotheses, computing critical values, and comparing test statistic to critical value.
Has the average community level of suspended particles for the month of August exceeded 30u/m3?
Do the data indicate that the sleeping pill is effective at a 1% level of significance?
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
Assume that a simple random sample has been selected from a normally distributed population. Find the test statistic, P-value, critical value(s), and state the final conclusion.
Do any of the selected samples seem to be out of the control limits? Describe.
According to table, which presents a MODI solution for a transportation problem, if that solution is used, which of the following is true.
Recognize and explain potential threats (up to 3) to external validity.
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