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A common stock is held for two years, during which time it receives an annual dividend of $20. The stock was sold for $100 and generated an average annual return of 32%. What price was paid for the
assume adults have IQ scores that are normally distributed with a mean of 105 and a standard dviation 20. find the probability that a rondomly selected adult has an IQ betwwen 93 and 117
A food snack manufacturer samples 7 bags of pretzels off the assembly line and weighs their contents. If the sample mean is 12.7 oz. and the sample standard deviation is 0.40 oz., find the 95% confi
A normal distribution has a mean of 45, and an unknown standard deviation. Which random variable value below could possibly have a z-score of 2.4?
A high school counselor is interested in the percentage of students who will be going to college. She randomly picks 60 students and finds that 53 will be going to college. Use a 95% confidence leve
At the .01 significance level, can we conclude that the mean number of patients per day is more than 25? Estimate the p-value and interpret it.
accounts have remained unpaid exceeds 50 days, the historical average for the company. Perform the hypothesis test by setting _____equal to .10, .05, .01, and .001.
The game scores from the Los Angeles Lakers are normally distributed. The average score was 106 points per game with a standard deviation of 6 points. What percent of the games had a score above 121
Despite the skewness of the distribution, there were no extreme outliers. Explain why we can use t procedures for these data. 2) What are the degrees of freedom?
When a survey calls residential telephone numbers at random, only 28% of the calls reach a live person. You watch the random dialing machine make 17 calls. What is the probability that exactly 3 cal
If the deposits into savings accounts are considered to be normally distributed with a standard deviation of $1,250, what sample size would be necessary at a 90% confidence level to determine the sa
what is the calculation if facebook reports that the average number of facebook friends worldwide is 175.5 with a standard deviation of 90.57 . if i was to take a sample of 25 students , what is the
You are receiving a trip to Europe as a graduation gift. The final destination is a surprise. You have only been to been told that you starting point is London and that you will be arriving there on
The sample mean and standard deviation were $2.05 and $0.40 respectively. Find a 90% confidence interval for the mean price of the greeting card.
A random sample of 70 printers discovered that a20 of them were being used in small businesses. Find the 99% limit for the population porportion of printers that are used in small businesses.
If a sample of 10 randomly selected months yields a mean advertising expenditure of $380 monthly, what is a 90% confidence interval for the mean of the store's monthly advertising expenditure?
If a fair six sided dice is rolled 1200 times find the probability of getting more than 210 sixes.
A sample of n = 100 observations from a normal population is drawn. The population mean is 500 and the population standard deviation is 200. Find the following.
A random sample of 100 voters found that 44% were goint to vote for a certain candidate. Find the 99% limit for the population proportion of voters who will vote for that candidate.
A random sample of 400 pregnant women revealed that 60 of them are smoking while pregnant. Test the physician's claim at the .05 level of significance.
Give a 99% confidence interval for the mean amount of the increase. Does omitting the annual fee induce customers to charge more on their credit cards?
Nine percent of undergraduate students carry credit card balances greater than $7,000. What is the probability that at least three will have a balance greater than $7,000?
Let n = 269 represent the number of ticket reservations. Let r represent the number of people with reservations who show up for the flight. What expression represents the probability that a seat wil
An auditor for Health Maintenance Services of Georgia reports 40% of policyholders 55 years or older submit a claim during the year. Fifteen policyholders are randomly selected for company records.
Suppose customers arrive according to poisson process at a rate of 8/hr. Service time is exponentially distributed with mean 15 min. Find the steady-state probability distributions.