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A media rental store rented the following number of movie titles in each of these catagories: 160 horrors, 242 drama, 114 mystery, 308 romance, and 134 comedy. If a person selects a movie to rent, find the probability that it is a drama or comedy.
Enter the answer as a fraction or decimal rounded to 3 decimal places.
P (drama or comedy)=
Test the null hypothesis that there is no linear relationship between the pretest score and the score on the final exam against the two-sided alternative
The eighth-grade national norm for a social science test is a score of 123. The research director of a school district wants to know how the scores
For a normal distribution with a mean of 169 and a standard deviation of 30, what is the z value (distance from the mean) for a random value to be 129?
Prepare tables of descriptive statistics (mean, median, Quartiles, IQR, and Standard Deviation) by firm for net profit margin (PROFITS). Discuss.
a manufacturer wants to increase the absorption capacity of a sponge. based on past data the average sponge could
The winning number might be, for example, either 2873 or 9999. Explain why these two outcomes have exactly the same probability.
a. What percent of the packages will be delivered in less than 18 hours? b. What percent of the packages will be delivered in more than 16 hours?
Using the table below, compute the spearman rank correlation coefficient for the aggressiveness scores. Does this suggest that both twins tend to be similar in degrees of aggressiveness?
Construct a stem and leaf diagram from the data in Problem 1 using one stem for the scores in the 50s, 60s, 70s, 80s, and 90s.
Describe the sampling distribution of X. - What is the mean of this sampling distribution?- What is the standard deviation of this sampling distribution?
Give the expected value and standard deviation of defective shoes in the ShoeFit store order.
Independently of all the others. The system is operational if no two adjacent lamps fail. Obtain an expression for system reliability.
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