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A coin is tossed 4 times. Let A be the event that the first toss is heads. Let B be the event that the third toss is heads.
Q1. What is the probability that the third toss is heads, given that the first toss is heads?
Q2. Are A and B independent? Why or why not?
Simplify the principal square root of 64 z^4. Assume that z represents a positive real number.
Let z represent the standard normal variable and suppose a value is randomly selected. Find each of the following probabilities by:
Calculate a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49.
The Wall Street Journal reported some interesting statistics on the job market. One statistic is that 40% of all workers say they would change jobs for "slightly higher pay."
The booster club has gotten several businesses and car dealers to donate gasoline and cars for the college students to use to make a maximum of 575 personal contacts daily during the fund-raising drive. The college student will donate a total of 2..
Can you envision circumstances under which these outcomes would not be normally distributed? Provide three distinct examples of the business outcomes that are not normally distributed.
Each undergraduate course taught cost the college an average of $2,500 in faculty wages, and each graduate courses cost $ 3,000. How many undergraduate and graduate courses should be taught in the fall so that the total faculty salaries are kept t..
The amount of Jen's monthly phone bill is normally distributed with a mean of $50 and a standard deviation of $10. Find the 25th percentile.
On a scale from 0 to 100, the mean level of economic development among the countries in the world is 65 and the standard deviation is 10. What proportion of countries in the world have economic development scores above 80?
A business invests $10,000.00 in a savings account for 2 years, At the beginning of the second year, an additional $3500.00 is invested, At the end of the second year, the account balance is $15,569.75. What is the annual interest rate?
Can the formal hypothesis testing approach be used for non parametric tests? How are parametric and nonparametric statistics different?
Effect of a new training program on time taken to complete a task, measured by a "before" and "after" test
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