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According to the National Restaurant Association, 20% of fine-dining restaurants have instituted policies restricting the use of cell phones. From a sample of 100 fine-dining restaurants,
a. What is the probability that the sample has between 15% and 25% of restaurants that have established such policies?
b. The probability is 90% that the sample percentage will be contained within what symmetrical limits of the population percentage?
Perform the indicated test of hypothesis. HO: M 7, given x= 0.01, N=25, Xbar = 7.019 and SD is =.1681. Assume the sample is selected from a normally distributed population.
The number of degrees of freedom corresponding to between treatments is:
If the company does not want to replace more than 5% of the televisions?
Using WSJ or IBD look up the following stocks: General Electric, General Motors, Microsoft and Intel and answer the following questions for each stock. You may have to refer to several issues of your newspaper for all of the information if the pap..
What is the probability that separates the bottom 25 percent from the rest of the distribution.
Suppose that n trials of a binomial experiment result in no successes.
Briefly explain how the standard deviation influences outcome of hypothesis test. How does σ influence measures of effect size?
The NY Dept of Motor Vehicles (DMV) designs its license plates with space for 7 letters or numerals. In the most recent iteration, the DMV uses three letters followed by 4 numbers.
At 0.05 level of significance, is there evidence of noteworthy difference in variation in sales among different aisle locations?
Can you test the significance of the relationship between physical activity level and systolic blood pressure, adjusting for age, and weight, given the ANOVA table above?
Under older Federal Aviation Administration rules, airlines had to estimate the weight of a passenger as 185 pounds. That amount is for an adult traveling in winter, and it includes 20 pounds of carry-on baggage.
Identify the sampling distribution to be used: the standard normal distribution or the Student's t distribution. Find the critical value(s).
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