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A nationwide study indicated that 80% of college students with a cell phone send and receive text messages with their phones. A simple random sample of n=200 college students with cell phones is obtained.
A) describe the sample distribution of p-hat, the sample proportion of college students with cell phones who send or receive text messages with their phones.
B) What is the probability that 154 or fewer college students in the sample send and receive text messages with their cell phones? Is this result unusual?
The state wanted to see how three different math classes compared, so they gave a standardized test to all the students. Given the following results
Use the binomial distribution in the Data Analysis add - in to simulate the distribution of men and women among the next ten arrivals at an emergency room, assuming that, on average, six people out of ten who arrive are men.
The height of women at a school are basically distributed with mean 66.4 in. and standard deviation 3.7 in. Determine the range of heights centered about the mean in which:
Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 40 people.
Each party's position must be statistically sound. Include as suitable graphs, computations, and statistical tests.
Thirty percent of the population in a southwestern community are Spanish-speaking Americans. A Spanish-speaking person is accused of killing a non-Spanish speaking American.
Find the probability of exactly 6 Mexican-Americans among 12 jurors.
NCAA Football Coach Salaries: Given below are annual salaries for simple random sample of NCAA football coaches (Based on data from USA). How do mean and median change if highest salary is omitted?
A survey of 300 union members in New York reveals that 112 favor the Republican candidate for governor. Construct the 98% confidence interval for the true population proportion of all New York State union members who favor the Republican candidate..
At α = 0.05, is the correctness of the prediction different for the two types of cola drinkers?
Provided an example of a research problem at any organization that would benefit from the employ of either descriptive statistics or probability distribution statistics.
A radio station in Myrtle Beach announced that at least 90% of the hotels and motels would be full for the Memorial Day weekend. The station advised listeners to make reservations in advance if they planned to be in the resort over the weekend.
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