Calculus and Above

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Find the value of the standard​ score, z, and determine
Find the value of the standard​ score, z, and determine whether to reject the null hypothesis at a 0.05 significance level. Is the alternative hypothesis​ supported? Upper H 0​: 4.50 ​grams, H a : u &… read more
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A credit score is used by credit agencies​ (such as mortgage
A credit score is used by credit agencies​ (such as mortgage companies and​ banks) to assess the creditworthiness of individuals. Values range from 300 to​ 850, with a credit score over 700 considered… read more
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A certain drug can be used to reduce the acid produced by
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Assume that the differences are normally distributed.
Assume that the differences are normally distributed. Complete parts ​(a) through ​(d) below. Observation 1 2 3 4 5 6 7 8 Upper X Subscript i 53.0 51.4 48.2 42.5 50.4 46.2 46.2 53.3 Upper Y Subscript … read more
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A genetic experiment involving peas yielded one sample of
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When testing gas pumps for​ accuracy, fuel-quality
When testing gas pumps for​ accuracy, fuel-quality enforcement specialists tested pumps and found that 1330 of them were not pumping accurately​ (within 3.3 oz when 5 gal is​ pumped), and 5656 pumps w… read more
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A genetic experiment involving peas yielded one sample of
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A 0.1 significance level is used for a hypothesis test of
A 0.1 significance level is used for a hypothesis test of the claim that when parents use a particular method of gender​ selection, the proportion of baby girls is different from 0.5. Assume that samp… read more
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One personality test available on the World Wide Web has a
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He claim is that the IQ scores of statistics professors are
he claim is that the IQ scores of statistics professors are normally​ distributed, with a mean greater than 117. A sample of 15 professors had a mean IQ score of 121 with a standard deviation of 11. F… read more
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Use the given information to find the ​p-value. ​Also, use a
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This question if for "Ryan" Find the critical z values.
this question if for "Ryan" Find the critical z values. Assume that the normal distribution applies. TwoTwo​-tailed ​test; alphaαequals=0.060.06 zequals= nothing ​(Round to two decimal places as neede… read more
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ARE THERE CHARGES IN VOLVED, According to a​ research,
According to a​ research, 52.052.0​% of households nationwide used natural gas for heating during a year.​ Recently, a survey of 2 comma 3002,300 randomly selected households showed that 53.053.0​% used natural gas. Use a 0.05 significance level to test the claim that the 52.052.0​% national rate has changed. Formulate the null and alternative hypotheses. Choose the correct answer below. A. Upper H 0H0​: pnot equals≠0.520.52​, Upper H Subscript aHa​: pequals=0.520.52 B. Upper H 0H0​: pgreater than>0.520.52​, Upper H Subscript aHa​: pless than<0.520.52 C. Upper H 0H0​: pequals=0.520.52​, Upper H Subscript aHa​: pgreater than>0.520.52 D. Upper H 0H0​: pequals=0.520.52​, Upper H Subscript aHa​: pnot equals≠0.520.52 Find the test statistic. zequals= nothing ​(Round to one decimal place as​ needed.) Find the​ P-value for the found test statistic. ​P-valueequals= nothing ​(Round to four decimal places as​ needed.) Now make a conclusion. Choose the correct answer below. A. There is not enough information to make a conclusion. B. There is not sufficient evidence to support the claim that the percentage of households using natural gas has changed. C. There is sufficient evidence to support the claim that the percentage of households using natural gas has changed … read more
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Find the P-value for the left-tailed hypothesis test with a
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1. Find the compliment of the claim. U>=256. Which is H0 and
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Do department managers have cooler heads? The mean temperature
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Children in the United States account directly for $ 36 billion
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1)The P-value for a hypothesis test is 0.078. For each of the
1)The P-value for a hypothesis test is 0.078. For each of the following significane levels,decide wheter the null hypothesis should be rejected. a)a=0.05 (b)a=0.10 Determine whether the null hypothesi… read more
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