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Statistics Biostatistics Data Data Science

04/22/22

What statistical test should I use for this statistics report?

I will copy-paste my questionshttps://drive.google.com/file/d/1j1yRqwith0wlm1ool4pPQf-iw8_1JIw7/view?usp=sharingthis is the data im meant to use, im meant to use excel. tysm!I understand this is a... more

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Statistics Probability

04/22/22

How many 5-letter words contain two vowels and three consonants?

In this question, words are sequences of letters from the English alphabet, vowels are the letters a, e, i, o, and u, and all the other letters are consonants. (a) How many 5-letter words contain... more

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Statistics

04/22/22

Z-score = Given that the average IQ of a person is 82 with a standard deviation of 15 points. Translate the following IQ scores into standardized scores

IQ = 72 98

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Statistics

04/21/22

Use the range rule of thumb for identifying significant values to identify the limits separating values that are significantly low or significantly high

Body and exam measurements were collected from 300 subjects. The pulse rates from 100 males have a mean of 68.8 beats per minute and a standard deviation of 10.9 beats per minute. Use the range... more

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Statistics

04/21/22

Statistics CLT Homework

A manufacturer knows that their items have a normally distributed length, with a mean of 20 inches, and standard deviation of 1.8 inches.If 25 items are chosen at random, what is the probability... more

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Statistics

04/20/22

Suppose X ~ N(4, 2). What value of x is three standard deviations to the right of the mean? (Enter an exact number as an integer, fraction, or decimal.)

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Statistics

04/20/22

Suppose the probability of an IRS audit is 5.2 percent for U.S. taxpayers who file form 1040 and who earned $100,000 or more.

A) What are the odds that such a taxpayer will be audited? _____ to _____B) What are the odds against such a taxpayer being audited? _____ to _____

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Statistics

04/19/22

x1,x1,...xn are i.i.d. and ~N(0,1), find E(x_i)

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Statistics

04/19/22

(a) What is the probability that there is at least 50% red M&Ms in the random sample? (b) What is the probability no more than one-third of the M&Ms in the random sample are red?

51% of the M&Ms in a large bag of M&Ms are red. Suppose you take a random sample of 30 M&Ms from the large bag. (Round your answers to four decimal places.)

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Statistics

04/19/22

(a) What is the probability that there is at least 50% red M&Ms in the random sample? (b) What is the probability no more than one-third of the M&Ms in the random sample are red?

51% of the M&Ms in a large bag of M&Ms are red. Suppose you take a random sample of 30 M&Ms from the large bag. (Round your answers to four decimal places.)

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Statistics Probability

04/18/22

Suppose a jar contains 8 red marbles and 36 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.

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Statistics

04/18/22

Sample Size Calculation

An IQ test is designed so that the mean is 100 and the standard deviation is 15 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics... 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 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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What statistical test should I use for this statistics report?

How many 5-letter words contain two vowels and three consonants?

Z-score = Given that the average IQ of a person is 82 with a standard deviation of 15 points. Translate the following IQ scores into standardized scores

Use the range rule of thumb for identifying significant values to identify the limits separating values that are significantly low or significantly high

Statistics CLT Homework

Suppose X ~ N(4, 2). What value of x is three standard deviations to the right of the mean? (Enter an exact number as an integer, fraction, or decimal.)

Suppose the probability of an IRS audit is 5.2 percent for U.S. taxpayers who file form 1040 and who earned $100,000 or more.

x1,x1,...xn are i.i.d. and ~N(0,1), find E(x_i)

(a) What is the probability that there is at least 50% red M&Ms in the random sample? (b) What is the probability no more than one-third of the M&Ms in the random sample are red?

(a) What is the probability that there is at least 50% red M&Ms in the random sample? (b) What is the probability no more than one-third of the M&Ms in the random sample are red?

Suppose a jar contains 8 red marbles and 36 blue marbles. If you reach in the jar and pull out 2 marbles at random at the same time, find the probability that both are red.

Sample Size Calculation

a company produces steel rods

A company produces steel rods.

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

Engineers must consider the diameters of heads when designing helmets.

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

Null Hypothesis test

statistics Chapter 14-15

Hypothesis of Interest

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

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

A population of values has a normal distribution with μ = 42.1 and σ = 84.5 .

A population of values has a normal distribution with μ = 217.4 and σ = 40.9 .

Business statistics

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