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If the researcher deems the data to be statistically significant, which of the following is true with respect to a conclusion reached?
A nursing school wants to estimate the true mean annual income of its alumni. It randomly samples 200 of its alumni. The mean annual income was $52,500 with a standard deviation of $1,800. Find a 9
in a supermarket 20% shoplifters usually get cought .if a random sample of 8 shoplifter is selected .
What is the number of neurons n such that the probability of more than n neurons have higher firing rates for Condition 1is 0.99?
A restaurant offers a "customer's choice" sandwich for which the customer specifies the types of bread, meat, cheese, and topping he or she wants. There are three types of bread, three types of meat
Their mean breaking strength is found to be 1808 pounds. Can we support, at the 0.01 level of significance, the claim that the mean breaking strength has increased?
If the director wishes to estimate the mean number of admissions per 24-hour period to within 1 admission with 99% reliability, what size sample should she choose?
A kitten whose weight is in the bottom 10% of the probability distribution of weights is called undernourished. What is the cutoff point for the weight of an undernourished kitten?
At a probability of type 1 error of 0.05, test the claim that the assistant professors earn more than $42000 per year. the standard deviation of the population is $5230.
Poll showed that 61% of Americans say they believe that life exists elsewhere in the galaxy. What is the probability of randomly selecting someone not having that belief?
An averageof 2 cars arrive at a highway tollgate every 10 seconds. If this rate is approximated by a Poisson process, what is the probability that exactly 3 cars will arrive in a 10-second period?
Assume that the duration of human pregnancies can be described by a normal model with mean 268 days and standard deviation 17 days. What percentage of pregnancies should last between 260 and 270 da
If five measurements are taken at various times during the day, what is the probability that the average blood pressure reading will be less than 150 and hence fail to indicate that the patient has
What is the standard error of estimate and suppose a large sample is selected and about 95 percent of the predictions would be between what two values.
In December of 1999, a research team at Ohio State University reported that the median allowance for U.S. teenagers is $50 per week, with a coefficient of skewness of 0.762. While some teenagers re
Finds the tires have a mean of life 55,000 miles. Based on the results of the test, can the consumer group report in its next publication that the tires last less than 60,000 miles?
In a random sample 1040 consumers, you find 35% have stopped buying the product. At alpha=0.04, do you have enough evidence to support the claim?
Suppose that distribution of grades has average of 78 with standard deviation of 11. Find the appropriate cutoff points for the grades A and F.
The probabilities .9 and .1 respectively. Give the probability distribution for daily sales. Find the mean and standard deviation of the daily sales.
Assume the number of minutes of cell phone use is a normal distribution with a population mean of 200 minutes and a population standard deviation of 50 minutes. What percent of the population talk
Determine the range and the standard deviation of the checking account balances. What do the first and third quartiles show? Determine the coefficient of skewness and indicate what it shows. Because
Given a sequence of independent flips of such a coin, derive a simple expression for the probability that the next flip will be a head.
The amounts of money won by the top ten finishers in a famous car race are listed below. What was the mean prize earned?
A random sample of 35 observations was selected from a normally distributed population. the sample mean was x-bar=51, and the sample variance was s^2=16.0. does the sample show sufficient reason to
Also, 74 percent of the managers have MBA degrees. Using the probability formulas, find the proportion of employees who either have MBAs or are managers.