Calculus and Above

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The mean wind speed in Region A is miles per hour. Assume
The mean wind speed in Region A is miles per hour. Assume the population standard deviation is miles per hour. The mean wind speed in Region B is miles per hour. Assume the population standard deviati… read more
Kofi
PhD in Statistics
Ph.D.
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In a survey of drivers from the​ South, wear a seat belt. In
In a survey of drivers from the​ South, wear a seat belt. In a survey of drivers from the​ Northeast, wear a seat belt. At ​, can you support the claim that the proportion of drivers who wear seat bel… read more
Kofi
PhD in Statistics
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A researcher claims that a​ post-lunch nap decreases the
A researcher claims that a​ post-lunch nap decreases the amount of time it takes males to sprint 20 meters after a night with only 4 hours of sleep. The table shows the amounts of time​ (in seconds) i… read more
Kofi
PhD in Statistics
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Is there enough evidence to support the​ scientist's claim?
is there enough evidence to support the​ scientist's claim? Assume the samples are random and​ dependent, and the population is normally distributed. Complete parts​ (a) through​ (e) below. Kofi… read more
Kofi
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An energy company wants to choose between two regions in a
An energy company wants to choose between two regions in a state to install​ energy-producing wind turbines. A researcher claims that the wind speed in Region A is less than the wind speed in Region B… read more
Kofi
PhD in Statistics
Ph.D.
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A real estate agency says that the mean home sales price in
A real estate agency says that the mean home sales price in City A is the same as in City B. The mean home sales price for homes in City A is ​\$. Assume the population standard deviation is ​\$. The me… read more
Kofi
PhD in Statistics
Ph.D.
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For the following​ information, determine whether a normal
For the following​ information, determine whether a normal sampling distribution can be​ used, where p is the population​ proportion, is the level of​ significance, is the sample​ proportion, and n is… read more
Kofi
PhD in Statistics
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Test the claim about the population​ mean, ​, at the given
Test the claim about the population​ mean, ​, at the given level of significance using the given sample statistics. ​Claim: ​; ​; . Sample​ statistics: ​, n Identify the null and alternative hypothese… read more
Kofi
PhD in Statistics
Ph.D.
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Decide whether the normal sampling distribution can be used.
Decide whether the normal sampling distribution can be used. If it can be​ used, test the claim about the population proportion p at the given level of significance using the given sample statistics. … read more
Kofi
PhD in Statistics
Ph.D.
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Test the claim about the population​ mean, ​, at the given
Test the claim about the population​ mean, ​, at the given level of significance using the given sample statistics. ​Claim: ​; ​; . Sample​ statistics: ​, n… read more
Kofi
PhD in Statistics
Ph.D.
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Use a calculator or computer software to generate a normal
Use a calculator or computer software to generate a normal quantile plot for the data in the accompanying table. Then determine whether the data come from a normally distributed population. Generate a… read more
Kofi
PhD in Statistics
Ph.D.
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In a​ 4-week study about the effectiveness of using magnetic
In a​ 4-week study about the effectiveness of using magnetic insoles to treat plantar heel​ pain, 51 subjects wore magnetic insoles and 47 subjects wore nonmagnetic insoles. The results are shown at t… read more
MunishK
Assistant Professor
M. Sc Mathematica
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We want to conduct a hypothesis test of the claim that the
We want to conduct a hypothesis test of the claim that the population mean score on a nationwide examination in anthropology is different from . So, we choose a random sample of exam scores. The sampl… read more
Kofi
PhD in Statistics
Ph.D.
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According to a certain government agency for a large​
According to a certain government agency for a large​ country, the proportion of fatal traffic accidents in the country in which the driver had a positive blood alcohol concentration​ (BAC) is 0.320.3… read more
Kimberley Wright
Masters
260 satisfied customers
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
Kofi
PhD in Statistics
Ph.D.
17,290 satisfied customers
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
GLENN GILONGOS
Master of Mathematics
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Section 8-2: 28 Assume a significant level of a + 0.05 and
Section 8-2: 28 Assume a significant level of a + 0.05 and use the given information for the following: Original claim: Women have heights with a standard deviation equal to 5.00 cm. The hypothesis te… read more
Ryan
Bachelor's Degree
4,665 satisfied customers
Statistics problems: For each exercise perform and show
Statistics problems: For each exercise perform and show these steps: a. State the Hypothesis and identify the claim b. find the critical value(s) c. Compute the test value d. Make the decision e. summ… read more
Stevewh
Teacher
Bachelor's Degree
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