20 students are selected at random. let X be the number of students in the sample...
20 students are selected at random. let X be the number of students in the sample with GPA greater that 3.0. it is known that 60% of students have a GPA of greater than 3.0. find the following:
P(x<4)
P(x=12)
P(6
Homework Answers
Add Answer to:
20 students are selected at random. let X be the number of
students in the sample...
66 randomly selected students were asked the number of pairs of shoes they have. Let X...
66 randomly selected students were asked the number of pairs of shoes they have. Let X represent the number of pairs of shoes. The results are as follows: # of Pairs of Shoes 4 5 6 7 8 9 10 11 12 13 14 15 Frequency 5 5 3 5 5 6 7 5 7 5 6 7 Round all your answers to 4 decimal places where possible. The mean is: _________ The median is: _________ The sample standard deviation...
A random sample of 15 night students was taken with a sample mean GPA of 2.82...
A random sample of 15 night students was taken with a sample mean GPA of 2.82 and a standard deviation of 0.05. A random sample of 17 day students was taken with a sample mean GPA of 2.79 and a standard deviation of 0.07. Test the claim that the mean GPA of night students (un) is greater than than the mean GPA of day students (up) at a = 0.10. Assume that the data come from normal populations with unequal...
conducts an experiment in which they tip a coin 10 times and count of heads. Let the random represent varlable X represent the number of heads. Write the distribution of x In a class of 40 studen...
conducts an experiment in which they tip a coin 10 times and count of heads. Let the random represent varlable X represent the number of heads. Write the distribution of x In a class of 40 students, each student conducts an experiment in which they flip a coin 10 times and count the number of heads. Let the random variable&represent the mean number of heads found by the students Write the distribution of á 8) One student conducts an experiment...
Suppose that n students are selected at random without replacement from a class containing 28 students,...
Suppose that n students are selected at random without replacement from a class containing 28 students, of whom 8 are boys and 20 are girls. We assume that 0 < n < 28. Let X denote the number of boys that are obtained. Answer the following questions: a (4 marks) State the distribution of X, with parameters b (1 mark) Write down the possible values of X c (1 mark) Express E(X) in terms of n. d (4 marks) For...
Forty randomly selected students were asked the number of pairs of sneakers they owned. Let X...
Forty randomly selected students were asked the number of pairs of sneakers they owned. Let X = the number of pairs of sneakers owned. The results are as follows. X Frequency 1 2 2 4 3 7 4 13 5 13 6 1 1.) Find the sample standard deviation, s. (Round your answer to two decimal places.) 2.) What percent of the students owned at least five pairs? (Round your answer to one decimal place.) *Please show step by step*
6.33 Let x be a continuous random variable that is normally distributed with a mean of 25 and a standard deviation o...
6.33 Let x be a continuous random variable that is normally distributed with a mean of 25 and a standard deviation of 6. Find the probability that x assumes a value a. between 28 and 34 b. between 20 and 35 6.34 Let x be a continuous random variable that has a normal distribution with a mean of 30 and a stan- dard deviation of 2. Find the probability that x assumes a value a. between 29 and 35 b....
Forty randomly selected students were asked the number of pairs of sneakers they owned. Let X...
Forty randomly selected students were asked the number of pairs of sneakers they owned. Let X = the number of pairs of sneakers owned. The results are as follows. X Frequency 1 2 2 5 3 6 4 13 5 13 6 1 A. Find the sample mean x. (Round your answer to two decimal places.) B. Find the sample standard deviation, s. (Round your answer to two decimal places.) C. Complete the columns of the chart. (Round your answers...
Let X be the number of packages being mailed by a randomly selected customer at a...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. 1 0.3 2 0.4 3 0.1 4 0.2 p(x) (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1 1.5 2 2.5 3 3.5 4 POCO (b) Refer to part (a) and calculate...
Let X be the number of packages being mailed by a randomly selected customer at a...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. x 1 P(x) 0.2 2 0.4 3 4 0.3 0.1 (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1.5 35 (b) Refer to part (a) and calculate PX $ 2.5). (c) Again...
A random sample of 15 night students was taken with a sample mean GPA of 2.82 and a standard deviation of 0.05. A random sample of 17 day students was taken with a sample mean GPA of 2.79 and a standard deviation of 0.07. Test the claim that the mean GPA of night students (un) is greater than than the mean GPA of day students (up) at a = 0.10. Assume that the data come from normal populations with unequal...
conducts an experiment in which they tip a coin 10 times and count of heads. Let the random represent varlable X represent the number of heads. Write the distribution of x In a class of 40 students, each student conducts an experiment in which they flip a coin 10 times and count the number of heads. Let the random variable&represent the mean number of heads found by the students Write the distribution of á 8) One student conducts an experiment...
Suppose that n students are selected at random without replacement from a class containing 28 students, of whom 8 are boys and 20 are girls. We assume that 0 < n < 28. Let X denote the number of boys that are obtained. Answer the following questions: a (4 marks) State the distribution of X, with parameters b (1 mark) Write down the possible values of X c (1 mark) Express E(X) in terms of n. d (4 marks) For...
6.33 Let x be a continuous random variable that is normally distributed with a mean of 25 and a standard deviation of 6. Find the probability that x assumes a value a. between 28 and 34 b. between 20 and 35 6.34 Let x be a continuous random variable that has a normal distribution with a mean of 30 and a stan- dard deviation of 2. Find the probability that x assumes a value a. between 29 and 35 b....
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. 1 0.3 2 0.4 3 0.1 4 0.2 p(x) (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1 1.5 2 2.5 3 3.5 4 POCO (b) Refer to part (a) and calculate...
Let X be the number of packages being mailed by a randomly selected customer at a certain shipping facility. Suppose the distribution of X is as follows. x 1 P(x) 0.2 2 0.4 3 4 0.3 0.1 (a) Consider a random sample of size n = 2 (two customers), and let X be the sample mean number of packages shipped. Obtain the probability distribution of X. 1.5 35 (b) Refer to part (a) and calculate PX $ 2.5). (c) Again...
Most questions answered within 3 hours.
-
A sock stuck to the side of a clothes-dryer barrel has a
centripetal acceleration of 24...
asked 46 minutes ago -
A perfect gas undergoes an isentropic process such that its
volume doubles. If the ratio of...
asked 1 hour ago -
list the elements in groups 3A to 6A in the same order as in the
periodic...
asked 1 hour ago -
Estimating effect size. Peng and Chen (2014)
evaluated effect size estimates for various tests. In their...
asked 1 hour ago -
Write a script in MySQL that creates and calls a stored
procedure name test. This procedure...
asked 1 hour ago -
If we test the following: H0: μ = 17
vs. H1: μ ≠ 17 and the...
asked 1 hour ago -
in the past year TVG had revenues of 3 million, cost
of goods sold of $25...
asked 1 hour ago -
4) In a polypeptide, which bond cannot rotate because of its
partial double bond character?
The...
asked 2 hours ago -
Assume that in the short run L = 1,000 and K = 100. 1. What is...
asked 2 hours ago -
At a given temperature, 2.06 atm of H2 and 3.7 atm of Br2 are
mixed and...
asked 2 hours ago -
Sodium reacts with Hydrochloric acid to form sodium chloride and
hydrogen gas. 2Na(s)+ 2 HCl(aq)-> 2...
asked 2 hours ago -
The following circuits (1 & 2) are combined to form a
series-parallel circuit and resulting circuit...
asked 2 hours ago