Based on a sample of 450 students, we found the average height is 165cm, with a...
Based on a sample of 450 students, we found the average height is 165cm, with a standard deviation of 6cm. a) Approximately how many percent of students are between 147 to 183cm? b) Assuming the histogram of height follows the normal distribution, approximately how many students have a height between 147 to 159cm? c) Assuming the histogram of height has a right skewed distribution, calculate the range of the height that will cover at least 71% of the students?
Homework Answers
Since we are given with the mean and standard deviation of the sample, we have a clear indication to use the normal distribution here. We can also use the Excel commands to solve this problem. =NORMDIST(X, Mean, Standard Deviation, TRUE) is the command to solve this problem. To get the value between the intervals, subtract the p-value obtained from bigger value to the smaller value using the NORMDIST function.
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Based on a sample of 450 students, we found the average height
is 165cm, with a...
Consider the approximately normal population of heights of male college students with mean μ = 66...
Consider the approximately normal population of heights of male college students with mean μ = 66 inches and standard deviation of σ = 4 inches. A random sample of 25 heights is obtained. (a) Describe the distribution of x, height of male college students. -skewed right -approximately normal -skewed left -chi-square (b) Find the proportion of male college students whose height is greater than 74 inches. (Give your answer correct to four decimal places.) (c) Describe the distribution of x,...
My hotes Asa Your consider the approximately normal population of heights of male college students with...
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If we are considering a population that is approximately normal and we choose the sample size...
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Suppose a researcher believes that the average height of female students in a large local high...
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A sample of call duration between different UPRM students is found to be 1.01, 0.97, 1.03, 1.04, 0.99, 0.98, 0.99, 1.01, and 1.03 minutes. Calculate a 99% confidence interval for the mean call duration (minutes), assuming an approximately normal distribution. Select one: o b. p c. t O d. any of the above
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Suppose a researcher believes that the average height of female
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wants to construct an interval that contains the true average
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certain prespecified probability. The researcher selects 36 female
students at random from the high school. The distribution of
heights is known to follow a normal distribution.
Suppose a researcher believes that the average height of female...
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