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The production of pasture grass for hay is an important agricultural product. A new type of grass, called Teff Grass is advertised to produce 2 ton of hay per acre on the first cutting. Twenty-five test plots of this new grass resulted in average production of 1.92 ton per acre on the first cutting with a standard deviation of 0.40 ton. Assume that the production of hay is a normally distributed random variable, which is a necessary assumption with this small sample.
1. What is the name of the distribution of the test statistic if the mean hay production is 2tons?
what is the area under the normal curve between z -1.0 and z
The accompanying results are the number of home burglaries during the test month for communities in which the respective publicity methods were employed. Use the 0.05 level in comparing the publicity techniques.
Produce a scatter plot of the average SAT math scores versus the year the test was taken for all students (male and female) during the last 10 years (1996-2005)
The red and black slots are arranged on the table in three columns of 12 slots each. A $1 column bet wins $3 if the ball lands in one of the 12 slots.
At the .01 significance level, can we conclude that a larger proportion of men were driving on the New Jersey Turnpike than the national statistics indicate?
Can you conclude that the information in the article is untrue? Use the 0.05 significance level. Determine the p-value and explain its meaning.
With a random sample of size 18, you calculate the value of the test statistic tcalc as -2.07. What is the p-value for the hypothesis test?
Determine r.m.s. error for regression prediction of height at 18 from height at 6.
The twentieth century saw highs and lows in the arena of civil rights for African-Americans. At every opportunity-whether through war or legislation-black.
Assume the length of games follows the normal distribution with a standard deviation of 10 minutes. Complete parts a through d below.
Independent samples are taken of a random variable X.- If the PDF of is uniform over the interval - Write the approximation as an equation.
If Boer's investment bankers charge a flotation cost of 0.14 as a fraction of the price of a new stock issue, what is Boer's cost of issuing new equity?
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