Reference no: EM1313092
1. In 1990, the average duration of long-distance telephone calls originating in one town was 7.2 minutes. A long-distance telephone company wants to perform a hypothesis test to determine whether the average duration of long-distance phone calls has changed from the 1990 mean of 7.2 minutes. Write the null and alternative hypothesis.
2. A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO, p, is less than 5 in every one thousand. Write the null and alternative hypothesis.
3. A medical school claims that more than 28% of its students plan to go into general practice. It is found that among a random sample of 130 of the school's students, 39% of them plan to go into general practice. Find the P-Value for a test of the school's claim.
4. In a sample of 88 children selected randomly from one town, it is found that 8 of them suffer from asthma. Find the P-value for a test of the claim that the proportion of all children in the town who suffer from asthma is equal to 11%.
5. Test the claim that the mean age of the prison population in one city is less than 26 years. Sample data are summarized as n = 25, x = 24.4 years, and s = 9.2 years. Use a significance level of α = 0.05.
Find the test statistic t.
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Find out the vertical and horizontal components
: Two balls, of masses = 60 and = 70, are suspended. The lighter ball is pulled away to a 67 angle with the vertical and released. Suppose that the positive axis is directed to the right.
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Find the angular speed of the cylinder
: A solid cylinder of radius 0.35 m is released from rest from a height of 1.8 m & rolls down the incline as shown. Find the angular speed of the cylinder when it reaches the horizontal surface?
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Find the contribution margin ratio and break even point
: Find the contribution margin ratio, Break even point and Margin of Safety and number of units sold to earn targeted profits and evaluate the company's contribution margin ratio?
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What is the capacitance of second capacitor
: A 1.2µF capacitor is charged to a potential difference of 11.0V. The wires connecting the capacitor to the battery are next disconnected from the battery and connected across a second, initially uncharged, capacitor. The potential difference across t..
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Null and alternate hypothesis for the given statement
: Test the claim that the mean age of the prison population in one city is less than 26 years. Sample data are summarized as n = 25, x = 24.4 years, and s = 9.2 years. Use a significance level of α = 0.05.
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Budgeted cash disbursements for the tilson company
: Prepare a schedule for each month showing budgeted cash disbursements for the Tilson Company and a schedule for each month showing budgeted cash receipts for Tilson Company
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Equilibrium real wage rate and equilibrium quantity
: Calculate the equilibrium real wage rate and the equilibrium quantity of labor. Suppose that the nominal wage rate equals 60. In the short-run, aggregate demand and aggregate supply are equal at a price level of 1.0. Compute the real wage rate.
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Its speed when it strikes the ground
: A block with mass m = 15kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4234N/m after being compressed the distance x1 = 0.536m from the spring's unstretched length. The floor is frictionless except for a roug..
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Hypothesis test-one sample mean
: Test the claim that for the adult population of one town, the mean annual salary is given by μ = $30,000.
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