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1. An experiment involves selecting a random sample of 256 middle managers at random for study. One item of interest is their mean annual income. The sample mean is commuted to be $35,420 and the sample standard deviation is $2,050. What is the standard error of the mean?
2. The wildlife department has been feeding a specal food to rainbow trout fingerlings in a pond. A sample of the weights of 40 trout revealed that the mean weight is 402.7 grams and the standard deviation 8.8 grams. What is the probability that the mean weight for a sample of 40 trout exceeds 405.5 grams?
What would you recommend Taylor do to cut back its labor cost? (Illustrate using an ABC plan.)
The grade point averages for 10 randomly selected high school students are listed below. Assume the grade point averages are normally distributed.
Explain how many cars would required to go by the speed trap to be 99.8% sure which at least one driver will warm oncoming traffic of the speed trap.
Make up a scatter diagram with 10 dots for each of the following situations:
A random sample of 36 days yielded the average daily output of 890.2 tons, with standard deviation of 19.8 tons. Use this information to make a 95% confidence interval for mean.
Criterion of realism or Hurwitz. Assume that the payoff from an investment depends on market conditions. Illustrate what is the criterion of realism value.
Which of the following is the appropriate conclusion from carrying out these multiple comparisons
Find the probability that a women develops breast cancer given that she has a family history of breast cancer._____________
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
There were 25 subjects included in each of the combinations of gender and smoking status. One of the variables measured was the heart rate after six minutes of exercise. A two-way ANOVA is performed with the resulting ANOVA table given below
Find out the least-squares regression line and interpret its slope.
The mean amount of time a (unnamed) computer server is down is 18.3 minutes with a standard deviation of 5.7 minutes.
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