Jan and Susan both have negative z scores signifying they scored below the mean.
Assume that all the distributions are normal, average is always taken to be the arithmetic mean x^- or mu. Which of these students scored below mean?
Relevant Questions
asked 2021-05-25
Assume that all the distributions are normal, average is always taken to be the arithmetic mean \(\bar{x}\) or \(\mu\). A college Physical Education Department offered an Advanced First Air course last semester. The scores on the comprehensive final exam were normally distributed, and the the z scores for some of the students are shown below:
Robert, 1.10
Juan, 1.70
Susan, -2.00
Joel, 0.00
Jan, -0.80
Linda,1.60
Which of these students scored below the mean?
asked 2021-05-03
Assume that all the distributions are normal, average is always taken to be the arithmetic mean xˉ or μ. A college Physical Education Department offered an Advanced First Air course last semester. The scores on the comprehensive final exam were normally distributed, and the the z scores for some of the students are shown below: $Robert, 1.10 \quad Juan, 1.70Susan,−2.001.70Susan,−2.00 Joel,0.00Jan,−0.80Linda,1.60Joel,0.00Jan,−0.80Linda,1.60 (c) Which of these students scored below the mean?
asked 2021-05-18
The college physical education department offered an advanced first aid course last semester. The scores on the comprehensive final exam were normally distributed, and the z scores for some of the students are shown below:
Robert, 1.10 Juan, 1.70 Susan, -2.00
Joel, 0.00 Jan, -0.80 Linda, 1.60
Which of these students scored above the mean?
Robert, 1.10 Juan, 1.70 Susan, -2.00
Joel, 0.00 Jan, -0.80 Linda, 1.60
Which of these students scored above the mean?
asked 2021-05-09
The college physical education department offered an advanced first aid course last semester. The scores on the comprehensive final exam were normally distributed, and the z scores for some of the students are shown below:
Robert, 1.10 Juan, 1.70 Susan, -2.00
Joel, 0.00 Jan, -0.80 Linda, 1.60
Which of these students scored above the mean?
Robert, 1.10 Juan, 1.70 Susan, -2.00
Joel, 0.00 Jan, -0.80 Linda, 1.60
Which of these students scored above the mean?
asked 2021-06-07
Which of the following is NOT a conclusion of the Central Limit Theorem? Choose the correct answer below.
a) The distribution of the sample means x over bar x will, as the sample size increases, approach a normal distribution.
b) The distribution of the sample data will approach a normal distribution as the sample size increases.
c) The standard deviation of all sample means is the population standard deviation divided by the square root of the sample size.
d) The mean of all sample means is the population mean \(\mu\)
a) The distribution of the sample means x over bar x will, as the sample size increases, approach a normal distribution.
b) The distribution of the sample data will approach a normal distribution as the sample size increases.
c) The standard deviation of all sample means is the population standard deviation divided by the square root of the sample size.
d) The mean of all sample means is the population mean \(\mu\)
asked 2021-08-08
Assume that the true value, that is the population mean, the average height of french women in france is 167.5 cm. Students in a class of 160 students each took a random sample of french women of size 100, measured the height of the women and calculated a 95% confidence interval (confidence interval) for the average height.How many students can be expected to calculate a confidence interval that does not include the number 167.5?
15 8 5 20 1
15 8 5 20 1
asked 2021-08-04
This exercise requires the use of a graphing calculator or computer programmed to do numerical integration. The normal distribution curve, which models the distributions of data in a wide range of applications, is given by the function
\(\displaystyle{p}{\left({x}\right)}={\frac{{{1}}}{{\sqrt{{{2}\pi^{\sigma}}}}}}{e}-\frac{{\left({x}-\mu\right)}^{{2}}}{{{2}\sigma^{{2}}}}\)
where \(\pi\) = 3,14159265 ... and \(\sigma\) and \(\mu\) are constants called the standard deviation and the mean, respectively. Its graph (for \(\sigma=1\) and \(\mu=2)\) is shown in the figure.
With \(\displaystyle\sigma={\color{red}{{5}}}\) and \(\mu=0\), approximate \(\displaystyle{\int_{{{0}}}^{{+\infty}}}{p}{\left({x}\right)}{\left.{d}{x}\right.}\).(Round your answer to four decimal places.)
