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The average hourly wage of workers at a fast food restaurant is $6.50/hr with a standard deviation of $0.45. Assume that the distribution is normally distributed. If a worker at this fast food resta
We select a random sample of college graduates employed full-time and find that the mean of the sample is 36 hours and that the standard deviation is 5 hours.
What type of data would you obtain from a rating scale? Please prove an application/example in your response of how this instrument could be used. For what population would you use a graphical rati
A recent study found that the average life expectancy of a person living in Africa is 53 years with a standard deviation of 7.5 years. If a person in Africa is selected at random, what is the probab
The heights in inches of 18 randomly selected adult males in LA are listed. Find the standard deviation. Display the data in a stem-and-leaf plot.
The American Automobile Association checks the prices of gasoline before many holiday weekends. ... during the May 2003 Memorial Day weekend in the Detroit, Michigan, area. .... before many holiday
A machine is set to fill a small bottlewith 9gram of a medicine. At the .01 sig level, can we conclude that the mean weight is less than 9 grams?
An employer wants to set a time limit so that 90% of the employees will finish a job on time. Past history has shown that the time required to do the job is normally distributed and has a mean time
Vagabond the mean output power is 42 watts, with a standard deviation of 8 watts Assuming a confidence level of 95%, which of the following statements do these data support?
The number of breakdowns is dependent on the shift, because the test value 11.649 is less than the critical value of 12.592.
Suppose an experiment utilizing a random block design has 3 treatments and 8 blocks for a total of 24 observations. Assume that the total Sum of Squares for the response is SS(Total) = 400. If the S
During a 36 year period, lightening killed 2768 people in the US. Assume that this rate holds true today and is constant throughout the year. Find the probability that tomorrow
A sample has a mean of 116 and a standard deviation of 18.2. Find the value of x that corresponds to each of these standard scores z = -1.26.
Would it be reasonable to conclude that the population mean of tread remaining is 0.30 inches?
How do you use these three levels in relationship to evaluate risk to patients in implementing the decisions based on research findings?
Does the evidence suggest that postpartum women do not get enough sleep? Use =0.05 level of significance. How is the problem set up using the classical and P-value approach.
The American Sugar Producers Association Wants to estimate the mean yearly sugar consumption. A sample of 16 people has a mean of 60 pounds and a standard deviation of 20 pounds.Would it be reasonab
A basketball player has made 66% of his foul shots during the season. Assuming the shots are independent, find the probability that in tonight's game he misses for the first time on his 6th attempt?
Great value in applying a new approach to the treatment of aggressive behavior to a small group of students. Why would this t Test be preferred to using another test statistic?
The Oil Price Information Center reports the mean price per gallon of regular gasoline is $3.26 with a population standard deviation of $.18. Assume a random sample of 40 gasoline stations is selec
suppose you work for an insurance company and you sell a $10,000 one year policy at an annual premium of $285. Actuarial tables show that the probability of death during the next year for a person o
You job is to figure out the necessary sample size to reduce sampling error to plus or minus $500. Do you need to have an estimate of the current mean income to answer this question? why or why not?
The amounts of money requested on home loan applications at Down River Federal Savings follow the normal distribution, with a mean of $70,000 and a standard deviation of $20,000. A loan application
The modem receiver takes a majority vote of the five received bits to estimate the input signal. Find the probability that the receiver makes the wrong decision.
At the 0.01 significance level is it reasonable to conclude that the modifaction reduced the number of traffic accidents?