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Statistics Math English

03/24/22

A 90% confidence intervals for the proportion...

A 90% confidence intervals for the proportion of first-year statistics students with brown hair is given to be (0.25, 0.41).(a) What is the sample proportion of students with brown hair? (Round to... more

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Statistics

03/24/22

Standard Normal Distribution

For a standard normal distribution, find:P(z < -1.19)

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Statistics

03/24/22

Exponential distribution

The average time between accidents in a factory is 7 weeks.Find the probability that more than 21 weeks pass between accidents.

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Statistics Math Intro To Statistics Continuous Random Variables

03/24/22

Find the standard deviation in volumes of quart-size Hellmann's mayonnaise jars.

The actual volumes of quart-size jars of Hellmann's mayonnaise are uniformly distributed from 31.43 to 32.5 fluid ounces. Find the standard deviation in volumes of quart-size Hellmann's mayonnaise... more

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Statistics

03/23/22

Statistical Math

NBA Player Stephen Curry has a better free throw percentage than the average forall NBA players. Based on his free throw percentage of 90.7%, the following bar graph displays the possible values of... more

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Statistics

03/23/22

stats i need help asap

Assume that adults have IQ scores that are normally distributed with a mean of 101.6 and a standard deviation 21.9. Find the first quartile Q,, which is the IQ score separating the bottom 25% from... more

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Statistics Math

03/23/22

I don't understand how to solve this. Can someone help me step by step?

A newspaper conducted a statewide survey concerning a proposal to raise taxes in order to prevent budget cuts to education. The newspaper took a random sample (assume it is an SRS) of 500... more

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Statistics Math English

03/23/22

A local five-star restaurant asks its patrons to fill out a quick satisfaction survey (is the patron satisfied or not) after their meal

A local five-star restaurant asks its patrons to fill out a quick satisfaction survey (is the patron satisfied or not) after their meal, and the restaurant claims that their satisfaction rating is... more

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Statistics

03/23/22

statistics problems

The area between z = −2.26 and z = 1.32 is

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Statistics Math Probability Maths

03/23/22

The average weight of 25 chocolate bars selected from a normally distributed population is 200 grams with a standard deviation of 10 grams.

The average weight of 25 chocolate bars selected from a normally distributed population is 200 grams with a standard deviation of 10 grams. Find the point estimate and the confidence interval... more

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Statistics Probability

03/23/22

Find P61 find the value and sample mean

A population of values has a normal distribution with μ=245.2μ=245.2 and σ=48.8σ=48.8. You intend to draw a random sample of size n=84n=84. Please answer the following questions, and show your... more

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Statistics Probability

03/23/22

find probability

A leading magazine (like Barron's) reported at one time that the average number of weeks an individual is unemployed is 30 weeks. Assume that the length of unemployment is normally distributed with... more

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Statistics Probability

03/23/22

A population of values has a normal distribution with μ=208.5μ=208.5 and σ=94.8σ=94.8. You intend to draw a random sample of size n=85n=85.

A population of values has a normal distribution with μ=208.5μ=208.5 and σ=94.8σ=94.8. You intend to draw a random sample of size n=85n=85. Please show your answers as numbers accurate to 4 decimal... more

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Statistics Probability

03/22/22

Help me please its urgent

A fast food chain store conducted a taste survey before marketing a new hamburger. The results of the survey showed that 75% of the people who tried this hamburger liked it. Encouraged by this... more

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Statistics Probability

03/22/22

In a Pet Club, 23 members have a dog, 37 members have a cat, 5 members have a hamster, and 10 members have a bird. What percentage of Pet Club members have a cat or a hamster?

In a Pet Club, 23 members have a dog, 37 members have a cat, 5 members have a hamster, and 10 members have a bird. What percentage of Pet Club members have a cat or a hamster? (Assume that each... more

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Statistics

03/22/22

Proportion of standard deviation

suppose the distribution of a variable is normally distributed. what proportion of the data will be within 0.75 standard deviations of the mean?

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Statistics

03/22/22

Minimum score required

Suppose ACT Science scores are normally distributed with a mean of 21.2 and a standard deviation of 4.7. A university plans to admit students whose scores are in thetop 35 %. What is the minimum... more

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Statistics

03/22/22

if you draw a card value of 4 or less from a standard deck of cards, i will pay you $18. if not you pay me $9. find the expected value proposition

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Statistics

03/21/22

Statistics: The CLT

A large tank of fish from a hatchery is being delivered to a lake. The hatchery claims that the mean length of fish in the tank is 15 inches, and the standard deviation is 6 inches. A random sample... more

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Statistics

03/21/22

Statistics: The CLT

Suppose x has a distribution with 𝜇 = 78 and 𝜎 = 8.Find P(74 ≤ x ≤ 79). (Round your answer to four decimal places.)

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Statistics

03/21/22

When 360 college students were surveyed160, said they own their car. Find a point estimate for p, the population proportion of students who own their cars.

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Statistics Probability

03/21/22

Statistic and Probability

Suppose that pulse rates among healthy adults are normally distributed with a mean of 79 beats/minute and a standard deviation of 8 beats/minute. What proportion of healthy adults have pulse rates... more

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Statistics

03/21/22

Confidence Intervals

A health insurance company wants to know the proportion of admitted hospital patients who have a type 2 diabetes at Orlando Health hospitals. How large of a sample should be taken to estimate the... more

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Statistics

03/21/22

This is a Statistics problem based on confidence

An Orlando radio station is interested in knowing the percentage of their listeners who attend their Summer Concert Series. How many listeners would the radio station need to sample to determine... more

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Statistics

03/20/22

According to Masterfoods

According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s are brown, 15% are yellow, 12% are red, 23% are blue, 23% are orange and 15% are green. You randomly... more

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A 90% confidence intervals for the proportion...

Standard Normal Distribution

Exponential distribution

Find the standard deviation in volumes of quart-size Hellmann's mayonnaise jars.

Statistical Math

stats i need help asap

I don't understand how to solve this. Can someone help me step by step?

A local five-star restaurant asks its patrons to fill out a quick satisfaction survey (is the patron satisfied or not) after their meal

statistics problems

The average weight of 25 chocolate bars selected from a normally distributed population is 200 grams with a standard deviation of 10 grams.

Find P61 find the value and sample mean

find probability

A population of values has a normal distribution with μ=208.5μ=208.5 and σ=94.8σ=94.8. You intend to draw a random sample of size n=85n=85.

Help me please its urgent

In a Pet Club, 23 members have a dog, 37 members have a cat, 5 members have a hamster, and 10 members have a bird. What percentage of Pet Club members have a cat or a hamster?

Proportion of standard deviation

Minimum score required

if you draw a card value of 4 or less from a standard deck of cards, i will pay you $18. if not you pay me $9. find the expected value proposition

Statistics: The CLT

Statistics: The CLT

When 360 college students were​ surveyed160, said they own their car. Find a point estimate for​ p, the population proportion of students who own their cars.

Statistic and Probability

Confidence Intervals

This is a Statistics problem based on confidence

According to Masterfoods

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When 360 college students were surveyed160, said they own their car. Find a point estimate for p, the population proportion of students who own their cars.