07/30/21

The line of best fit through a set of data

The line of best fit through a set of data is y=43.867−2.669xAccording to this equation, what is the predicted value of the dependent variable when the independent variable has value 70?Round to 1... more
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07/30/21

What is the predicted explanatory value?
You run a regression analysis on a bivariate set of data (n=93). You obtain the regression equation y=−3.808x+41.312with a correlation coefficient of r=−0.608 (which is significant at α=0.01). You... more
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07/30/21

indicated probability
Assume the random variable x is normally distributed with mean μ=80 and standard deviation σ=4. Find the indicated probability.​P(x<78​)
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07/30/21

Probability question Im stumped
 A company has invested $100,000 in a plant which should meet all foreseeable demand for a patented product. The annual demand is normally distributed with a mean of of 20,000 units and a standard... more
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07/29/21

Please Help with this problem
Statistics students in Oxnard College sampled 11 textbooks in the Condor bookstore and recorded the number of pages in each textbook and its cost. The bivariate data are shown below:  Number of... more
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07/29/21

I am having trouble Please Help
Statistics students in Oxnard College sampled 9 textbooks in the Condor bookstore, and recorded the number of pages in each textbook and its cost. The bivariate data is shown below, Number of Pages... more
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07/29/21

Help me, thanks!
The difference between two positive integers is 6. If the smaller is added to the square of the larger, the sum is 104 . Find the integers by solving the equation.
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07/29/21

Which is MORE LIKELY: a.) a single butterfly has wings that are shorter than 0.8 cm, or b.) a sample of 50 butterflies has an average wing length that is shorter than 0.8 cm.
For a certain species of butterfly, the length of a wing (at its longest point) is normally distributed with a mean of 1 cm and a standard deviation of 0.2 cm.Which is MORE LIKELY: a.) a single... more
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07/29/21

Give an example of a continuous random variable which is not normally distributed.

Give an example of a continuous random variable which is not normally distributed. 
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07/29/21

Ina box contain 21 marbles: 6 white, 7 black, and 8 yellow. Randomly pick out one marble and return it back to the box for 8 times. What is the possibility to get exact 4 white and 3 black marbles?

The answer has four decimal place.
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07/29/21

C5.5: Suppose that the weights of all such animals can be described by a Normal model with a standard deviation of 98 pounds.
A livestock cooperative reports that the mean weight of yearling Angus steers is 1147 pounds. Suppose that the weights of all such animals can be described by a Normal model with a standard... more
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07/28/21

Equation of a circle
Given the general equation of a circle is x² + y² + 2x - 4y - 4 = 0Write the equation in the form of (x - h)² + (y - k)² = r²
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07/27/21

Find the measure of a. Please help!
A. 84 B. 90 C. 48 D. 44
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07/27/21

Expand (3x + y2)5.
Expand (3x + y2)5. (Simplify your answer completely.) 
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07/27/21

The mean daily production of a herd of cows is assumed to be normally distributed with a mean of 36 liters, and standard deviation of 11 liters.
The mean daily production of a herd of cows is assumed to be normally distributed with a mean of 36 liters, and standard deviation of 11 liters.A) What is the probability that daily production... more
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07/26/21

The length of time to find a parking space with mean of 6 min, standard deviation of 2 min. Probability it takes at least 9 min to find parking spot
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07/26/21

Solve math problem
x2-3x=28 plz solve
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07/26/21

test statistic, p-value?
You wish to test the following claim (Ha) at a significance level of α=0.002.    Ho:μ=62.9      Ha:μ<62.9You believe the population is normally distributed, but you do not know the standard... more
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07/26/21

Hypothesised population proportion, test statistic, p-value?
In a certain school district, it was observed that 27% of the students in the elementary schools were classified as only children (no siblings).  However, in the special program for talented and... more
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07/26/21

Construct a 98% confidence interval for the population mean length of time?
Suppose you are a researcher in a hospital. You are experimenting with a new tranquilizer. You collect data from a random sample of 12 patients. The period of effectiveness of the tranquilizer for... more
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07/26/21

Find the 80% confidence interval

 You intend to estimate a population mean μ from the following... more
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07/24/21

Given a standard normal distribution, find the probability of selecting a z-score greater than -2.49.
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07/24/21

HELP! Which statistical test can I use!

I have 6 studies, 3 studies on a old drug treatment that increases hormone “A” in patients with a specific disease to help relieve their symptoms, and 3 studies on three different new drugs that... more
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07/24/21

please help me with this problem!!
Software testers have reported their testing results of your team’s latest software release. Out of a sample of 1540 tests, 117 tests resulted in a crash. Your boss wants an estimate of the true... more
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07/22/21

find: P(-2.44 < z < -1.94)
For a standard normal distribution
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