07/01/20

Find the mean weight statistics- need help
You measure 32 textbooks' weights, and find they have a mean weight of 70 ounces. Assume the population standard deviation is 6.6 ounces. Based on this, construct a 95% confidence interval for the... more
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07/01/20

Stats- Critical Value Question
For a confidence level of 80% with a sample size of 10, find the critical t value.Critical Value = (round answer to 3 decimal places)
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07/01/20

Need Help- Sample Size Question
Start of QuestionsA political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 8% margin of error at a 95% confidence... more
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07/01/20

Need Statistics Help As Soon As Possible
Out of 400 people sampled, 176 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids.Give your answers as decimals, to three placesI am... more
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07/01/20

The average time between accidents in a factory is 20 weeks. Find the probability that more than 24 weeks pass between accidents.
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07/01/20

The average time between accidents in a factory is 18 weeks. Find the probability that more than 23 weeks pass between accidents.
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07/01/20

Many electronics follow a failure rate described by an exponential probability density function (PDF).

 Solar panels are advertised to last 20 years or longer, but panels made in China are failing at a higher rate. The time-to-failure of this device is usually exponentially distributed with mean 5... more
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07/01/20

Find P(X>6) if the mean is 22 and the standard deviation is 16
Find P(2≤X≤26)Find P(10≤X≤30)
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06/30/20

Geometric Series ?
Find a_10 if a_3=135 and r=1/3
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06/30/20

Card Probability

Find the probability of drawing an ace and a queen when two cards are drawn without replacement from a standard deck of cards.
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06/30/20

Midpoint on a triangle
Use GHJ, where A, B, and C are midpoints of the sides. If GH = 3x + 3 and BC = 2x - 3 what is GH
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06/30/20

Find the margin of error with the given values: 𝑐 = .9, 𝑥̅ = 8.1, 𝜎 = 2.5, 𝑛 = 36 (a) .685 (b) .375 (c) .817 (d) 1.37
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06/30/20

Find the standardized test statistic given: Claim: 𝜇 > 1745 , 𝑥̅ = 1752, 𝑠 = 38, 𝑛 = 44, 𝛼 = .05 (a) 1752 (b) 1447.4 (c) 1.22 (d) -1.22
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06/30/20

A fast food restaurant estimates that the mean sodium content in one of its breakfast sandwiches is 920mg. Construct the null and alternative hypotheses. Identify which one is the claim. 𝐻0: 𝐻𝑎:
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06/30/20

Find the P-value for the indicated hypothesis test with the given standardized test statistic. Right-tailed test, 𝑡 = 3.07, 𝑛 = 25
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06/30/20

Determine the decision that needs to be made at the 5% level of significance given the following information: 𝐻0:𝑝=0.45 𝐻𝑎:𝑝<.45and𝑃=0.064
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06/30/20

What effect does increasing the margin of error have on finding a minimum sample size for the mean?
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06/30/20

A certain fruit’s weights are normally distributed, with a mean of 290 grams and a standard deviation of 33 grams. A random sample of 23 pieces of fruit is taken.
(a) Describe the sample distribution of the sample means. 𝑋~N( ____ , ____ )(b) If you pick 23 pieces of fruit at random then 13% of the time, their mean weight will be greater than how many grams?
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06/30/20

certain fruit’s weights are normally distributed, with a mean of 290 grams and a standard deviation of 33 grams. A random sample of 23 pieces of fruit is taken.
(a) Does the CLT apply for this scenario? Explain.(b) Define 𝑋
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06/29/20

Given x = -1 + 3i, y = -2 - 5i, find and simplify the following:
 Given x = -1 + 3i, y = -2 - 5i, find and simplify the following:a.      x + yb.      xyc.      x/yd.     xy
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06/29/20

How do you find the coefficient of variation for two samples like this one

Listed below are pulse rates (beats per minute) from samples of adult malesand females (from Data Set 1 “Body Data” in Appendix B). Does there appear to be a difference?Male: 86 72 64 72 72 54 66... more
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06/29/20

A patient receives 10 mL of medicine every day at the same time. If 50% of the medicine metabolizes during the day, how much medicine will be left in his body after 3 days?

plz help me, thank you so much!!
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06/29/20

What is the y-intercept

What is the y-intercept of the line that passes through the points (3,7) and (-2,-3)?
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06/29/20

8. please answer all parts

For the standard normal distribution (μ=0μ=0 and σ=1σ=1), find:P(z < -1.14) =?
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06/29/20

7. please answer all parts

Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested.... more
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