Heights were measured for a random sample of 20 plants grown while being treated with a particular nutrient. The sample mean and sample standard deviation of those height measurements were 39 centimeters and 12 centimeters, respectively.

Assume that the population of heights of treated plants is normally distributed with mean M. Based on the sample, can it be concluded that M is different from 45 centimeters? Use the 0.1 level of significance.

Perform a two-tailed test. Then fill in the table below.

The null hypothesis is:
The alternative hypothesis is:
The type of test statistics: z, t, chi square, f
The result of the test statistics (rounded to at least three decimals)
The p-value(rounded to at least three decimals)

Solution Summary

The statistics of plant heights for a particular nutrient is examined.

Please help with the following problem.
Theories have been developed about the heights of winning candidates for the U.S. presidency and the heights of candidates who were runners-up. Listed below are heights (in inches) from recent presidential elections. Is there a linear correlation between the heights of candidates who w

Assume the males and females who prefer the movie "Crash" are samples taken from the population of males and females in the U.S. Their heights are used to calculate sample statistics.
Females-17 Males-9
Females heights-66,62,64,71,61,68,68,62,69,68,70,64,63,68,62,64,67
Male heights-71,76,71,66,74,76,73,72,70
1. Use stude

See attached file for full problems and data.
Answer each problem below. Be sure to show all work. Give statistical evidence for your analysis and use statistical vocabulary.
Problem 1:
What is the probability that a person selected at random from the collected data will be male?

Probability questions on NBA.
ONLY DO PROBLEM 1 and 2 from the four questions in the document.
Problem 1 ? Consider the NBA Data Set Given:
A. What proportion of these players are less than 74 inches tall?
B. Suppose a random sample of 25 of these players is taken and x is the number of players in the sample who are less t

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If the mean and the standard deviation of a continuous random variable that is normally distributed are 20 and 5, respectively, find an interval that contains 68% of the distribution.
A. (18,24)
B. (15,25)
C. (12,25)
D. (10,30)
2. If the mean and the standard deviation of a continuous random variable that is normally d

To estimate the mean size of maple trees in a certain area of the Adirondacks. A sample of 15 maple tree heights is collected (refer to the data set).
Data Sheet numbers:
50, 41, 31, 33, 47, 39, 41, 44, 39, 32, 35, 43, 37, 49, 51
a) Determine a 90% confidence interval for the population mean of maple tree heights.

47. Corn plants from a test plot are measured, and the distribution of heights at 10-cm intervals is recorded below.
(see chart in attached file)
Calculate (a) the mean height, (b) the variance (c) the standard deviation, and (d) standard error of the mean.
48. The genes dumpy wing (dp), clot eye (cl), and apterous wing