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A survey found that people who took coldeeze at the onset of a cold suffered on average 42 hours. What proportion of the reprsentative sample (with a mean of 63 hours and standard deviation of 20 su
Construct a confidence interval of the population proportion at the given level of confidence. x=105, n=150, 95% confidence
Assume there is a rope with the length of 10 feet, Alexa will cut it anywhere along the rope's length with equal probability. Let X be the distance from the starting point to the cutting point.
At the .01 significance level, is there a difference in the mean number of times men and women send a Twitter message in a day? What is the value of the test statistic for this hypothesis test?Answe
How does the horsepower and weight affect the mileage of family Sedan ? Data from a sample of 20 2010 family sedans were collected and organized and stored in Auto 2010 :
An instructor for a stat class of 250 students decided that she was going to curve the exam grades if the average is lower than 80. After grading 50 exams, she observed that the average is 77. She k
In a very large population, the distribution of annual income is skewed, with a long right tail. We take a simple random sample of n people from this population and record the n incomes. We expect a
A company wished to model the number of minutes required to unload shipments of drums of chemicals at its warehouse as a function of the number of drums and the total shipment weight in hundreds of
Formulate a linear programming model to determine the optima areas in square yards for each of the three crops. Solve three iterations of the simplex method for this model.
A newspaper selected a simple random sample of 1,600 readers. They asked whether the paper should increase its coverage of local news and 40% said yes. What is the 95% confidence interval for the pr
The outcomes of a t test with 38 degrees of freedom, where the acquired value of t was 1.38, and the significance level was p < .20. 2. The proper placement of a figure within the text. 3. The pr
The length of human pregnancies from conception to birth varies according to a distribution that is approximately normal having a mean of 266 days with a standard deviation of 16 days. What is the
You conducted a Chi-Square Goodness of Fit Test in your ASCI 691 capstone project. Unfortunately, you did not get the sample size you had hoped for during your research. You were able to get 55 in t
You conducted a t-test in your capstone research. You did not find a statistically significant difference between your groups even though your sample size was relatively small. Upon conducting a pos
Name the distribution and specify the parameters of T. What's the probability that in session with the software remote, student uses it for more than 45 min?
The pulse rates for 13 adult women were as follows. Construct a 0.98 confidence interval for the mean pulse rate. (Give your answers correct to one decimal place and show owrk please).
Test at the 5% level of significance. Assume the population standard deviation= $1,580. Compute the z or t value of the sample test statistic.
A survey of 850 workers were asked how much they used the Internet at work. 578 said they used the internet within limits, and 255 said that they did not use the Internet within limits. Construct
Sketch the area corresponding to the most extreme 1% of the standard normal distribution using the normal curve. Find the z scores that correspond to the most extreme 1% of the standard normal distr
If you want to alter the cutoff value from 60 in order to reduce the error probability in part a to .05, what cutoff value should you choose?
Each private locker in the gym building is labeled with three upper-case alpha characters followed by two Base 16 characters. What is the maximum number of different locker numbers that can be gene
What is the probability that there are exactly 6 girls among the first 10 and exactly 12 girls among the first 19 babies born in a certain hospital in a given week?
A population is normal with a variance of 17. Suppose you wish to estimate the population mean, u. Find the sample size needed to assure with 68.26% confidence that the sample mean will not differ f
Compute the standard error of the estimate of the data below.
A random group of seniors was selected from a university and asked about their plans for the following year. The school advising office claims that 55% of the students plan to work, 30% of the stude