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Categorize as simple, random, sample, stratified/systematic sample, cluster/convenience sample.
1) List discharged hotel customers, divide them day their length of stay, and draw simple random samples from each group.
2) List discharged hotel customers, number the customers and use random number table to obtain sample.
3) Randomly select hotel customer from 4 geographic regions and include the discharged customers.
4) At the beginning of the year have each hotel survey their 300 customer discharged.
5) Have each hotel survey 20 discharged customers and send in the results for the week.
What is the value of the sample test statistic? (Test the difference p1 - p2. Do not use rounded values. Round your final answer to two decimal places.)
Using the original data, test at the 5% significance level that the population standard deviation of studying times is greater than 4 hours.
From a previous study, the standard deviation of the ages is known to be 3 years.
The firm examined 35 randomly chosen fax transmissions during the next year, yielding a sample mean of 14.44 with a standard deviation of 4.45 pages. (a) At the .01 level of significance, is the true mean greater than 10? (b) Use Excel to find the..
At the .10 significance level you will test to determine if there has been an increase in selling time. Assuming we are using a t test what will be the critical value"?
Which of the given signifies difference in two population proportions?
Make a scatter plot of Y and X1 using Word. To do this click on insert and then chart. Click on X Y (Scatter). Enter the data from the table.
Is there evidence to suggest a difference in the mean waiting times at the four body shops? Use the .05 significance level.
The mean annual salary paid to all employees in a company was EURO 30.000. The mean annual salaries paid to male and female employees of the company were EURO 32.000, and 24.000, respectively. Determine the percentage of males and females employed..
Prediction interval for the regression line - Using the age and sick days data from table below, find the 98% prediction interval when x = 47 years.
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be:
Finding the probability selecting a defective item from a collection of items using tree diagram
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