8,955 Answered Questions for the topic statistics

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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Statistics

04/11/22

The Acme Company manufactures widgets
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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Statistics

04/11/22

Pointless Survey at Costco
In a relatively pointless survey, the following data was collected on cars in a Costco parking lot: there were 35 orange cars; 38 green cars; 23 purple cars; 27 white cars; 86 red cars; 19 cars of... more
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Statistics

04/11/22

Estimating Population Standard Deviation or Va
A clinical trial was conducted to test the effectiveness of a drug used for treating insomnia in older subjects. After treatment with the​ drug, 17 subjects had a mean wake time of 90.8 min and a... more
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04/11/22

What is the approximate percentage of light-bulb replacement requests numbering between 45 and 65?
The physical plant at the main campus of a large state university receives daily requests to replace florescent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a... more
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Statistics

04/10/22

Approximately normally distributed with a mean of 53.8 in, and standard deviation of 2.1 in. What is the probability that the height of a randomly chosen child is between 52.55 and 54.25 in?

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Statistics Math Algebra 1 Algebra 2

04/10/22

Two dice are rolled. Determine the probability of the following. Rolling an even number or a number greater than 10.
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Statistics

04/10/22

Find critical value and critical region.
A 0.05 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 less than 0.5. Assume that... more
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Statistics

04/09/22

Find test statistics value, p- value, critical value and critical region.
A 0.05 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 less than 0.5. Assume that... more
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Statistics

04/09/22

Find statistic test and p-value

In a study of the accuracy of fast food drive -through orders, onerestaurant had 30 orders that were not accurate among 372orders observed. Use a 0.10 significance leve to 10%. Does theaccuracy... more
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Statistics

04/09/22

95% show up only for a flight of the time. Airline can fit 40 pax at $4000 but sells 42 tickets. What is the expected value of x? What is the interpretation of this value?
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Statistics Probability

04/08/22

I need help with probability statistics!!
The lengths of births in a small rural village are normally distributed with a mean of 269 days and a standard deviation of 15 days.In what range would you expect to find the middle 98% of most... more
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Statistics

04/07/22

An apple a day.
 An apple a day: A supermarket sells apples in bags labeled as weighing 10 pounds A sample of 50 bags: had a mean weight of 10.3 pounds with standard deviation of 0.1 pound. Someone wants to know... more
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Statistics

04/07/22

help with this problem
In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a mean of 53.3 inches, and standard deviation of 1... more
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Statistics

04/07/22

i need help solving this

A population of values has a normal distribution with μ=51.5 and σ=89.2. You intend to draw a random sample of size n=215. Please show your answers as numbers accurate to 3 decimal places.Find the... more
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