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A high school counselor desires to analyze whether the teenage pregnancy rate at her school is different from rate nationwide. She knows that the rate nationwide is 15 %. She randomly chooses 80 fem
A study estimates that there is the strong positive correlation in the U. S. between teachers' salaries as well as annual consumption of liquor. Determine most valid conclusion?
At the ? = 0.05 level of significance, is there sufficient evidence to conclude that a difference exists between the proportion of swimmers who had ear infections?
What is the distribution of the time at which the last message is sent by you?
Each and every participant tastes both Cheddar and Swiss cheese grilled sandwiches. Except for the kinds of cheese employed in the grilled sandwiches, there is no difference between the two kinds o
A researcher is interested in comparing tastiness of different kinds of cheese in grilled cheese sandwiches. The researcher expects that Cheddar cheese grilled sandwiches are rated tastier than Swis
A researcher is interested in comparing Christian maturity level of students who volunteer for the community service versus those who do not. The researcher supposes that those who carryout communit
What statistical test should be employed to examine the data? Identify H0 and Ha for this study. Conduct the appropriate analysis.
A high school counselor wants to examine whether the teenage pregnancy rate at her school is different from the rate nationwide. She knows that the rate nationwide is 15 %.
Determine the joint probability function for X1 and X2. What are the marginal probability functions for X1 and X2? Are X1 and X2 independent random variables?
The number of arrivals at the gallery is Poisson distribution with the average of 4.5 people per hour. Determine the probability that between 10 and 14 people (inclusive) will arrive in the next 4-hou
Consider the manufacture of Grandmother's Fudge Nut Butter Cookies. Grandmother has noted that the number of nuts in a cookie is a random variable with a Poisson mass function and that the average n
Grandmother has noted that number of nuts in a cookie is the random variable with the Poisson mass function and that the average number of nuts per cookie is 1.5. Estimate the numerical value of the
Determine the numerical value of the probability of having at least one nut in a randomly selected cookie?
Joe Galaxy is the astronaut for project Pluto. Mission success or failure depends only on behavior of three major systems. Joe decides the following assumptions are authentic and apply to the perfor
Assume that an intelligence test is constructed to have the normal distribution with a mean of 100, and the standard deviation of 15. Between what two scores symmetrically distributed around mean wi
About the time when Joe was due back on Earth, you overheard the radio broadcast regarding Joe in a very noisy room. You're not positive what the announcer say, but, based upon all available informa
The plant manager randomly chooses a molding from the early morning run and discovers it is defective. Determine the probability that the foreman forgot to shut off the machine the previous night?
Suppose the time needed by the worker to carry out a maintenance operation is normally distributed with the mean of 68 minutes and a standard deviation of 7 minutes. Compute the probability that the
Employ rejection region approach and the level of significance =0.10 to test the proper hypothesis. Determine the appropriate p-value for this hypothesis
Determine the P-value of your test in (b) [ i.e approximate it by placing it between two values.] What kind of population should the sample have come from in order that t-test be valid?
Suppose that a procedure yields a binomial distribution with the trial repeated n times. Employ the binomial probability formula to find the probability of x successes given the probability p of suc
Find out the probability that if the airline books 22 persons, not enough seats will be available? Determine the probability that not enough seats will be available.
Assume you will carry out a test to determine whether there is sufficient evidence to support the claim of linear correlation between two variables. Find out the critical values of r given the numbe