8,918 Answered Questions for the topic statistics

Statistics

04/17/22

a company produces steel rods
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 125.7-cm and a standard deviation of 1.5-cm. For shipment, 6 steel rods are bundled... more
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Statistics

04/17/22

A company produces steel rods.
A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 172.1-cm and a standard deviation of 1.5-cm. For shipment, 26 steel rods are bundled... more
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Statistics

04/17/22

Express the confidence interval 342.4 < μ < 536.2 in the form of ¯ x ± M E .
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Statistics

04/17/22

Engineers must consider the diameters of heads when designing helmets.

Engineers must consider the diameters of heads when designing helmets. The company researchers have determined that the population of potential clientele have head diameters that are normally... more
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Statistics

04/17/22

A study was conducted on students from a particular high school over the last 8 years.

A study was conducted on students from a particular high school over the last 8 years. The following information was found regarding standardized tests used for college admitance. Scores on the SAT... more
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Statistics Math

04/14/22

Null Hypothesis test
In a large scale study done 10 years ago 32% of adults with children under the age of 18 reported that their family ate dinner together seven nights a week in a recent pole 175 of 500 adults with... more
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Statistics

04/14/22

statistics Chapter 14-15
Polling, part II. According to Pew Research, the contact rate (probability of contacting a selected household) in 1997 was 69% and in 2003 was 76%. However, the cooperation rate (probability of... more
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Statistics Probability

04/14/22

Hypothesis of Interest
Between 2009-2010 all high school classes were taught in person. The mean SAT grades during this period was μ=1100To understand the impact that online classes have on student learning, 16 students... more
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Statistics

04/14/22

If n=380 and phat=0.25, construct a 95% confidence interval
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Statistics

04/14/22

If n=160 and phat=0.95, construct a 95% confidence interval
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Statistics Math

04/13/22

A population of values has a normal distribution with μ = 42.1 and σ = 84.5 .
Find the probability that a single randomly selected value is between 30 and 58.4. Round your answer to four decimal places.P(30<X<58.4)=    Find the probability that a randomly selected... more
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Statistics Math

04/13/22

A population of values has a normal distribution with μ = 217.4 and σ = 40.9 .
Find the probability that a single randomly selected value is greater than 221.2. Round your answer to four decimal places. P(X>221.2)=  Find the probability that a randomly selected sample of... more
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Statistics Math Business Accounting

04/13/22

Business statistics
Temperature is used to measure the output of a production process. When the process is in control, the mean of the process is mean = 133.7  and the standard deviation is = 0.7.a. Construct... more
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Statistics

04/12/22

Suppose you calculate a 99% confidence interval of 13.05 to 21.64. Determine the margin of error.
Suppose you calculate a 99% confidence interval of 13.05 to 21.64. Determine the margin of error.
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Statistics Math

04/12/22

NEED HELP please!!!!!

A study was conducted on students from a particular high school over the last 8 years. The following information was found regarding standardized tests used for college admitance. Scores on the SAT... more
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Statistics Math

04/12/22

NEED HELP!!!!! PLEASE

Engineers must consider the diameters of heads when designing helmets. The company researchers have determined that the population of potential clientele have head diameters that are normally... more
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Statistics

04/12/22

Enter an exact number as an integer, fraction, or decimal. P(19 < x < 35)
Births are approximately uniformly distributed between the 52 weeks of the year. They can be said to follow a uniform distribution from one to 53 (spread of 52 weeks).
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Statistics

04/12/22

Engineers must consider

Engineers must consider the diameters of heads when designing helmets. The company researchers have determined that the population of potential clientele have head diameters that are normally... more
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04/12/22

a journal paper which has included any correlation statistical analyses
Subject: Psychology-Search for a journal paper that has included any correlation statistical analyses[Type the name and URL of the paper]-And report the following: 1) Keywords you use in this... more
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Statistics Math Probability Maths

04/12/22

Is hypothesis testing an efficient way of solving problems?why? Provide real life experience/example.
Is hypothesis testing an efficient way of solving problems?why?Provide real life experience/example.
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04/12/22

Choose the procedure for estimating the mean difference.
Suppose that a scientist seeks to compare the ability of a new hand sanitizer to eliminate Pseudomonas aeruginosa bacteria against the hand sanitizer currently in use. Assume that the mean number... more
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Statistics

04/11/22

A study was conducted

A study was conducted on students from a particular high school over the last 8 years. The following information was found regarding standardized tests used for college admitance. Scores on the SAT... more
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Statistics Math

04/11/22

Need help with this

H0:μ=54.29H1:μ>54.29Your sample consists of 22 subjects, with a mean of 55 and standard deviation of 1.42.Calculate the test statistic, rounded to 2 decimal places.t=
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Statistics Math

04/11/22

Need help solving this
H0:μ=31.1H1:μ<31.1Your sample consists of 38 subjects, with a mean of 30.2 and a sample standard deviation (s) of 1.86.Calculate the test statistic, rounded to 2 decimal places.t=
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Statistics

04/11/22

Empirical Rule need help

The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 51 ounces and a standard deviation of 7 ounces.Use the Empirical Rule,... more
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