In order to estimate the average time spent on the computer terminals per student at a local university, data were collected for a sample of 81 business students over a one-week period. Assume the population standard deviation is 1.8 hours. Answer questions 1-3.     1. What is the standard error of the mean? Group of answer choices 0.20 7.50 2.00 0.39       2. With a 0.95 probability, the margin of error is approximately Group of answer choices 0.39 1.96 0.20 1.64       3. If the sample mean is 9 hours, then the 95% confidence interval is Group of answer choices 8.61 to 9.39 hours 7.36 to 10.64 hours 7.04 to 10.96 hours 7.80 to 10.20 hours

Q: Joan's finishing time for the Bolder Boulder 10k race was 1.81 standard deviations faster than the…

A: It is given that the z-score is 1.81.

Q: Two out of 8 students at a local college say that they skip dinner in the evening. Find the mean,…

A: Given that  Success of probability p =2/8=0.25 Number of trials n=20 X~binomial (n,p)

Q: The population standard deviation           a. is always the same as the sample standard deviation.…

A: Solution: The standard deviation explains the dispersion in the data. The population standard…

Q: Joan's finishing time for the Bolder Boulder 10K race was 1.78 standard deviations faster than the…

A: From the provided information, Joan’s finishing time for the Bolder Boulder 10k race was 1.78…

Q: Joan’s finishing time for the bolder boulder 10k race was 1.85 standard deviations faster than the…

A:

Q: The We Go Farther Tire Company advertises a tire that lasts for 80,000 miles. The mileage for the…

A:

Q: The sample standard deviation is one measure that describes the value in the sample that the data…

A: A single number that seeks to represent a set of data by identifying the center position within that…

Q: A large company has many employees and the annual salaries of those employees follow a normal…

A: X follows a Normal distribution with mean = 70000 and S.D = 12000 Then z=(x-mean)/SD =…

Q: A randomly selected list of everyday food items was generated. Twenty-eight Grub Savers stores were…

A:

Q: Suppose that the average length of American songs is 245 seconds with a standard deviation of 28…

A: Solution: Let X be the length of American songs. From the given information, X has mean µ=245…

Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…

A: The mean is 500 and the standard deviation is 100.

Q: Suppose that Sacramento workers have a mean commute of 17 minutes and commute times are normally…

A:

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: students has an average of 300 dollars and a standard deviation of 1,000. Suppose that we take a…

A: It is given that the random variable X i.e, the amount of money in savings accounts follow normal…

Q: ketch a bell curve for the ACT composite data with markings on the horizontal axis for ±1 standard…

A: here given , For the ACT, the mean composite score was 21.0 with a standard deviation of 5.2.

Q: 500 freshmen at Arundel University took part in a math comprehension test. The scores were normally…

A: From the provided information, Mean (µ) = 75 Standard deviation (σ) = 7 Let X be a random variable…

Q: The salary for workers at a company are normally distributed with a mean of $60,000 and a standard…

A:

Q: Suppose you organized a​ 10-kilometer race in which the times were normally distributed with a mean…

A: Let X be any selected finishing time. Here, we have to find the percentage of runners took longer…

Q: Refer to the accompanying table, which describes results from groups of 8 births from 8 different…

A: xP(x)00.00310.02620.11830.21240.27450.22760.10870.02780.005

Q: All the houses in Stanton county have a mean size of 1650 square feet with a standard deviation of…

A:

Q: The percent fo Coloradans that own a Subaru is 56%. If you were to take a random sample of size 70,…

A: We have given that,  Let X be the random variable from binomial distribution with probability (p) =…

Q: Suppose that the distance of fly balls hit to the outfield (in baseball) is normally distributed…

A:

Q: What percentage of computer programmer major received a starting offer between $32000 and $38000?…

A: The following information has been provided: \mu = 39269, \text{ } \sigma = 2550Mean : μ=39269,…

Q: The mean is μ = girl(s). (Round to one decimal place as needed.) The standard deviation is o =…

A: Number of girls xP(x)00.00310.03220.11430.22740.26650.21460.11270.02980.003

Q: Suppose that heights of women in Utah are normally distributed with a mean of 74 inches and a…

A:

Q: In a bell-shaped distribution, 95 % of the data falls within 1 standard deviation of the mean.

A: Given that In a bell-shaped distribution, 95 % of the data falls within 1 standard deviation of the…

Q: Calculate z scores from two samples "he tallest living man at one time had a height of 252 cm. The…

A: Given data,Mean is μ=170.25sd is     σ=8.47

Q: The latest available data showed health care spending were $8086 per person in the United States…

A: Givenpopulation mean = $8086population standard deviation = $2500sample size = 100Health care…

Q: The scores of individual students on the American College Testing (ACT), a college readiness…

A: Given data The scores of  individual students has a  mean of 18.6 and a standard deviation of 6.0.…