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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 level to find the population proportion.
a) State the 95% confidence interval for population proportion. (Round to tenth of a percent)
b) State the margin of error (Round to tenth of a percent)
Make a stem plot for the men height data. Calculate the five-number summary for the women.
Researchers are studying the absorption of two drugs into the bloodstream. Each drug is to be injected at three dosages. There are 24 people in the study, and they are randomly divided into six groups.
According to the Sleep Foundation, the average night's sleep is 6.8 hours. Assume the standard deviation is 0.6 hours and the probability distribution is normal. a. What is the probability that a randomly selected person sleeps more than 8 hours?
The nation health department has concerns with the chlorine level of 0.4% mg/mL at a local water park raises to unsafe level.
In grading eggs into small, medium and large, Margi farms packs the eggs that weigh more than 4.25 ounces in packages marked " large" and the eggs that weigh less than 2.45 ounces in packages marked " small" the remainder are packed in packages ma..
The number of degrees of freedom corresponding to between treatments is:
Forecast sales for the next day using a three-day weighted moving average where the weights are 3, 1, and 1 (the highest weight is for the most recent number).
An internal study by the Technology Services department at Lahey Electronics revealed company employees receive an average of 3.3 emails per hour. Assume the arrival of these emails is approximated by the Poisson distribution.
Calculate the probability of a value between 75.0 and 90.Calculate the probability of a value of 75.0 and less.
Carry out a test of hypothesis on each of regression coefficients. Could you delete any of the variables?
If 16 out of 20 spins just came up black, determine the probability that next spin is going to be red?
Critically discuss the concept of the normal distribution, why it is important, and what you think it means. When students talk about "grading on the curve," how does that apply to the normal distribution?
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