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Statistics Probability

12/21/21

The worldwide market share for a web browser was 20.5% in a recent month. Suppose that a sample of 240 random students at a certain university finds that 60 use the browser.

b. Suppose that a sample of n=800 students at the same university (instead of n=240) determines that 25% of the sample use the web browser. At the 0.01 level of significance, is there evidence... more

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Statistics Probability

12/21/21

The data in the accompanying table represent the compressive strength, in thousands of pounds per square inch (psi), of 20 samples of concrete taken two and seven days after pouring.

Sample Two days Seven... more

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Statistics T Test One Tailed t Test Writing A Research Question

12/20/21

When is the One-tailed t-Test the appropriate choice?

I will explain the purpose and function of t-Tests (compare two means scores) Explain that the probability value .05 is applied directionally - exclusively one direction (higher or lower than the... more

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Statistics Probability

12/20/21

If X=70, S=12, and n=16, and assuming that the population is normally distributed, construct a 90% confidence interval estimate of the population mean, μ. please round to two decimal places.

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Statistics Probability

12/20/21

If X=70, S=12, and n=16, and assuming that the population is normally distributed, construct a 90% confidence interval estimate of the population mean, μ. please round to two decimal places.

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Statistics Probability

12/20/21

stats hw final practice 10

Assume there is a sample of n1=4, with the sample mean X1=37 and a sample standard deviation of S1=2, and there is an independent sample of n2=5 from another population with a sample mean of... more

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Statistics Probability

12/20/21

If X=70, S=12, and n=16, and assuming that the population is normally distributed, construct a 90% confidence interval estimate of the population mean, μ.

If X=70, S=12, and n=16, and assuming that the population is normally distributed, construct a 90% confidence interval estimate of the population mean, μ. please round to two decimal places.

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Statistics Probability

12/20/21

b. Determine the p-value and interpret its meaning. The p-value is

A manufacturer of chocolate candies uses machines to package candies as they move along a filling line. Although the packages are labeled as 8 ounces, the company wants the packages to contain a... more

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Statistics Probability

12/20/21

hw 8 question 10, please answer part a and b

A cellphone provider has the business objective of wanting to determine the proportion of subscribers who would upgrade to a new cellphone with improved features if it were made available at a... more

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Statistics Geometry Economics

12/19/21

Suppose that $2000 is invested at a rate of 5.5%, compounded semiannually. Assuming that no withdrawals are made, find the total amount after 3 years.

Homework question that I can't seem to get correct....Suppose that $2000 is invested at a rate of 5.5%, compounded semiannually. Assuming that no withdrawals are made, find the total amount after 3... more

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Statistics Probability

12/18/21

Let n1 =100, x1=60 , n2 =100, and x2=80 . Complete part (b) below.

Calculate the test statistic, ZSTAT, based on the difference p1−p2.The test statistic, ZSTAT, is negative 3.09−3.09.(Type an integer or a decimal. Round to two decimal places... more

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Statistics Probability

12/17/21

According to a recent report, 44% of college student internships are unpaid. A recent survey of 100 college interns at a local university found that 49 had unpaid internships.

a. Use the five-step p-value approach to hypothesis testing and a 0.01 level of significance to determine whether the proportion of college interns that had unpaid internships is different from... more

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Statistics Probability

12/17/21

In a one-tail hypothesis test where you reject only in the lower tail, what is the if zstat = +1.08

What is the P vlaue?

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Statistics Probability Stats

12/16/21

Probability Question

A thermostat is set on 70 degrees. A room temperature is distributed normally with the standard deviation of .1. What is the probability that the room temperature will be higher than 70.2 degrees?

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Statistics

12/16/21

If you randomly select three peanut M&M’s, compute that probability that at least one of them is blue.

If you randomly select three peanut M&M’s, compute that probability that at least one of them is blue.According to Masterfoods, the company that manufactures M&M’s, 12% of peanut M&M’s... more

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Statistics Math

12/16/21

math i need help asap

More and more people are abandoning national brand products and buying store brand products to save money. The president of a company that produces national brand coffee claims that 40% of the... more

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Statistics Math

12/16/21

i need help anyone?

According to a 2020 study, the average cost of gas, oil, tires, and maintenance on commuters who travel 15,000 miles per year in their own vehicles was $1770. A recent study based on 300 such... more

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Statistics Probability Maths

12/16/21

If the height of students in one school follows a normal distribution with a mean of 160 cm and a standard deviation of 5 cm. What is the percentage of the students with a height of 155-165 cm?

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Statistics

12/15/21

Math please help

A highway construction zone has a posted speed limit of 40 miles per hour. Workers working at the site claim that the mean speed of vehicles passing through this construction zone is at least 50... more

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Statistics

12/15/21

Find eight numbers such that the mean, the median, and the mode of the numbers are all 45, and no more than two of the numbers are the same.

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Statistics Math Biology Biostatistics

12/15/21

Population Dynamics

In a survey of northern mountain ash seedlings in northern Ontario, researchers randomly placed eight 1.0 m by 2.0 m quadrats in a field that measured 100 m by 150 m. Estimate the population... more

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Statistics

12/15/21

Si r = 0.8, la proportion de la variabilité de Y qui n'est pas expliquée par X est

a) 0,20b) 0,80c) 0,64d) 0,36

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Statistics Probability

12/14/21

Statistics question

2) The number of auto parts that a company produces follows a normal distribution. The company has two independent production lines: Line 1 produces an average of 75 parts per day with a... more

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Statistics Math

12/14/21

poisson distribution

a manufacturing process produces on the average 1.2 defects per 100 units of output and the number of defects follows a poisson distribution. What is the probability that the next 500 units show... more

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Statistics Linear Regression Anova

12/14/21

FILLING ANOVA TABLE

The partial ANOVA table below shows the results of an experiment to test the effect of two factors (A and B) on the yield in a production process. The levels of each factor were selected... more

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The worldwide market share for a web browser was 20.5​% in a recent month. Suppose that a sample of 240 random students at a certain university finds that 60 use the browser.

The data in the accompanying table represent the compressive​ strength, in thousands of pounds per square inch​ (psi), of 20 samples of concrete taken two and seven days after pouring.

When is the One-tailed t-Test the appropriate choice?

If X=70​, S=12​, and n=16​, and assuming that the population is normally​ distributed, construct a 90% confidence interval estimate of the population​ mean, μ. please round to two decimal places.

If X=70​, S=12​, and n=16​, and assuming that the population is normally​ distributed, construct a 90% confidence interval estimate of the population​ mean, μ. please round to two decimal places.

stats hw final practice 10

If X=70​, S=12​, and n=16​, and assuming that the population is normally​ distributed, construct a 90% confidence interval estimate of the population​ mean, μ.

b. Determine the​ p-value and interpret its meaning. The​ p-value is

hw 8 question 10, please answer part a and b

Suppose that $2000 is invested at a rate of 5.5%, compounded semiannually. Assuming that no withdrawals are made, find the total amount after 3 years.

Let n1 =100​, x1=60 ​, n2 =100​, and x2=80 . Complete part​ (b) below.

According to a recent​ report, 44% of college student internships are unpaid. A recent survey of 100 college interns at a local university found that 49 had unpaid internships.

In a​ one-tail hypothesis test where you reject only in the lower ​tail, what is the if zstat = +1.08

Probability Question

If you randomly select three peanut M&M’s, compute that probability that at least one of them is blue.

math i need help asap

i need help anyone?

If the height of students in one school follows a normal distribution with a mean of 160 cm and a standard deviation of 5 cm. What is the percentage of the students with a height of 155-165 cm?

Math please help

Find eight numbers such that the mean, the median, and the mode of the numbers are all 45, and no more than two of the numbers are the same.

Population Dynamics

Si r = 0.8, la proportion de la variabilité de Y qui n'est pas expliquée par X est

Statistics question

poisson distribution

FILLING ANOVA TABLE

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The worldwide market share for a web browser was 20.5% in a recent month. Suppose that a sample of 240 random students at a certain university finds that 60 use the browser.

The data in the accompanying table represent the compressive strength, in thousands of pounds per square inch (psi), of 20 samples of concrete taken two and seven days after pouring.

If X=70, S=12, and n=16, and assuming that the population is normally distributed, construct a 90% confidence interval estimate of the population mean, μ. please round to two decimal places.

If X=70, S=12, and n=16, and assuming that the population is normally distributed, construct a 90% confidence interval estimate of the population mean, μ. please round to two decimal places.

If X=70, S=12, and n=16, and assuming that the population is normally distributed, construct a 90% confidence interval estimate of the population mean, μ.

b. Determine the p-value and interpret its meaning. The p-value is

Let n1 =100, x1=60 , n2 =100, and x2=80 . Complete part (b) below.

According to a recent report, 44% of college student internships are unpaid. A recent survey of 100 college interns at a local university found that 49 had unpaid internships.

In a one-tail hypothesis test where you reject only in the lower tail, what is the if zstat = +1.08