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Compute the probability that a simple random sample of automobile insurance policies of size 100 will have a sample mean within $25 of the population mean.
The probability that a tomatoe seed will germinate is 0.7. If the farmer plants the seeds in groups of 14 what is the mean of seeds germainating in each group and the standard deviation?
To determine how the number of housing starts is affected by mortgage rates, an economist recorded the average mortgage rate and the number of housing starts in a large country for the past 10 years
An airline fi nds that 5% of the persons making reservations on a certain flight will not show up for the flight. If the airline sells 160 tickets for a flight that has only 155 seats, what is proba
At the 0.05 level of significance, test whether the software package has reduced the average time it takes to complete deliveries.
At the 5% level of significance, test whether the proportion of internet users paying bills online is now more than 50%.
Next, prepare a 700-1,050-word analysis of your survey. In your analysis, include the following: a. Explain how the proposed survey addresses your problem statement
She wants to choose the passing grade such that the probability of passing a student who guesses on every question is less than 1/10. What score should she set as the lowest passing grade?
Find the minimum sample size needed, using a prior study that found that 19% of computers needed repairs or had problems by the time the product was three years old.
Assume you have a normally distributed sample of n = 2,500 female college students with a mean weight of 130.00 pounds and a standard deviation of 14.00 pounds.
A customer receives a defective product. What is the probability that it came from Binford? What assumptions did you make to answer this question?
Let X denote the number of students that were on the bus carrying this randomly selected student. One of the 4 bus drivers is also randomly selected. Let Y denote the number of students on his bus.
Suppose you are using a 0.01 significance level to test the claim that 800 using a P-value. You are given the sample statistics n = 35, 770, and 82. Find the P-value.
Question. What is the probability the newspaper's sample will lead the newspaper to predict defeat of the referendum, that is, what is the probability that the newspaper's sample results in a sample
A professor is interested in comparing the average amount spent on textbooks for freshmen and sophomores. What is the appropriate degrees of freedom in this case? Give your answer to four decimal plac
How many pages should the manufacturer advertise for each cartridge if it wants to be correct 90 percent of the time?
You select a sample of 64 measurements from a normally distributed population. Suppose that your sample mean is 1175 and that your sample standard deviation is 100. Using α=0.05, what is the
The average wage of georgia cashiers is $17.44 per hour with a standard deviation of $5.25. in which sate do the wages of the cashiers appear to be more dispersed? please show your work."
A random sample of 48 days taken at a large hospital shows that an average of 38 patients were treated in the emergency room (ER) per day. The standard deviation of the population is 4.
If a popcorn kernel is randomly selected, what is the probability that it takes between 130 seconds to 170 seconds for the kernel to pop?
what is the minimum sample size needed if the total width of the confidence interval must be less than 5 percentage points i.e. the confidence interval should extend at most 2.5 percentage points ab
What is the response variable in this problem? How much money the teacher spent on school supplies. What is the explanatory variable in this problem?
Assuming that the standard deviation of stock price movements that day was 2 points and assuming stock price movements were normally distributed around their mean of 1.5 points, what is the probabil
Find a 95% confidence interval for the difference between this year and last year in the mean number of units sold at all retail stores and interpret the results.
A machine fills boxes of fish fingers to a mean volume of 368 grams with a standard deviation of 15 grams. Assume that the volumes in the bottles are normally distributed. If a sample of 25 boxes is