Reference no: EM13245226
1) A study of 35 golfers showed that their average score was 92. The standard deviation of the sample was 5.
a) Find the best point estimate of the mean.
b) Find the 95% confidence interval of the mean score for all golfers.
c) Find the 95% confidence interval of the mean score if the sample of 60 golfers is used.
d) Which interval is smaller? Explain why.
2) Pizza Hut wishes to find the 90% confidence interval of the true mean cost of a medium "veggie" pizza. How large a sample is needed if the store manager wants to be accurate to within $0.10? A previous study gave a standard deviation of $0.57.
3) A sample of 17 states has the cigarette taxes (in cents) listed:
112 120 98 55 71 35 99 124 62
150 150 55 100 132 20 70 93
Find the 98% confidence interval for this tax in all 50 states, the District of Columbia, and Puerto Rico.
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Find the time interval for each cycle
: A particular heat engine has a useful power output of 4.90 kW and an efficiency of 27.0%. In each cycle, Find the time interval for each cycle
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Explain melting point from low to high
: Predict the order of melting point, from low to high, for the following compounds, based on intermolecular forces: CaF2 H2O H2S CH2Cl2 N2
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Derive the equations for total revenue for the two firms
: The price in a market is dominated by two firm is affected by the quantities supplied by both firms, Q1 and Q2: P = 120 - (Q1 + Q2). The marginal cost for the two firm is identical and constant and equal to 20.
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What is the secondary potential
: A transformer has 590 primary and 170 secondary turns. An alternating potential of 90 V is applied to the primary
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Find the best point estimate of the mean
: Find the best point estimate of the mean and find the 95% confidence interval of the mean score for all golfers.
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Who bears the cost of import barriers protecting a job
: Who bears the cost of import barriers protecting a job where the industry employing labor has lost its comparative advantage Consider the use of tariffs on steel imports into the U.S. during the recent Bush Administration.
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Define ph halfway to the equivalence point for the titration
: What is the pH halfway to the equivalence point for the titration of 0.20 M CH3NH2 with 0.20 M HCl? (Kb of CH3NH2 = 4.4 x 10-4)
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Determine the total impedance
: An LRC circuit is connected to a 12.0-kHz , 745-V (rms) source, L = 28.0mH , R = 8.80k? , and C = 6350pF, Determine the total impedance
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Explain does either firm have a dominant strategy
: Firm K can earn $25 million in profits from strategy S if firm L responds with strategy P, and $7.5 million in profit from S if L responds with strategy Q. Firm K can follow strategy T, which returns $16 million if firm L responds with strategy P ..
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