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MATH SOLVE
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General
A bearing used in an automotive application is required to have a nominal inside diameter of 1.5 inches. A random sample of 25 bearings is selected and the average inside diameter of these bearings is 1.4975 inches. Bearing diameter is known to be normally distributed with standard deviation inch. (a) Test the hypotheses versus using The true mean hole diameter significantly different from 1.5 in. at alpha equals 0.01. (b) What is the P-value for the test in part (a)
General
4 months ago
Assume that the population of the world in 2010 was 6.9billion and is growing at the rate of 1.1% a year. a) Set up a recurrence relation for the population of theworld n years after 2010. b) Find an explicit formula for the population of theworld n years after 2010. c) What will the population of the world be in 2030? 21. A factory makes custom sports cars at an increasing rate
General
4 months ago
Which expression is equivalent to 7-2z-4(z^3-z^3+4z^2+11z+14/z+2)?a. -4z^3+4z^2+6z+35b. -4z^3+4z^2-10z-21c. -18z-5d. -18z+10
General
4 months ago
Complete the solution of the equation. Find thevalue of y when x equals -5.-3x – 3y = -6
General
4 months ago
For each, list three elements and then show it is a vector space.(a) The set of linear polynomials P1 = {a0 + a1x | a0, a1 ∈ R} under the usual polynomial addition and scalar multiplication operations.(b) The set of linear polynomials {a0 + a1x | a0 − 2a1 = 0}, under the usual polynomial addition and scalar multiplication operations.
General
4 months ago
In a large population, 76% of the households have cable tv. A simple random sample of 225 households is to be contacted and the sample proportion computed. What is the probability that the sampling distribution of sample porportions is less than 82%?
General
4 months ago
5. How long will it take Greg to earn $500.00? Round to the nearest hour
General
4 months ago
A sleep time of 15.9 hours per day for a newborn baby is at the 10h percentile of the distribution of sleep times for all newborn babies. Assuming the distribution is normal with a standard deviation of 0.5 hour, approximately what is the mean time, in hours per day, for newborn babies? A. 15.1 B. 15.3 Ğ¡. 16.3 D. 16.5 E. 16.7
General
4 months ago
Eric wants to double protect his flower bed with a regular hexagonal shaped fence surrounded by a rectangular fence. How many feet of fencing does Eric need to surround his entire flower bed? Fencing is only sold in whole number quantities. Do not include units in your answer.
General
4 months ago
two pools are leaking, after 15 minutes pool A has leaked 2/3 gallon, after 20 minutes pool B has leaked 2/3 gallon. Which pool is leaking water the fastest and by how much?*20 points* please answee quick!
General
4 months ago
a line passes through the point (8,-4) and has a slope 3/4
General
4 months ago
twice a number plus twice a second number is 310. The difference between the numbers is 55
General
4 months ago
The first day of baseball comes in late March, ending in October with the World Series. Does fan support grow as the season goes on? Two polls, one conducted in March and one in November, both involved random samples of 1,001 adults aged 18 and older. In the March sample, 44% of the adults claimed to be fans of professional baseball, while 52% of the adults in the November sample claimed to be fans. (a) Construct a 99% confidence interval for the difference in the proportion of adults who claim to be fans in March versus November. (Let p1 be the proportion of people who claim to be baseball fans in March and p2 be the proportion of people who claim to be baseball fans in November. Use p1 − p2. Round your answers to three decimal places.)
General
4 months ago
Use the sample information 11formula13.mml = 37, σ = 5, n = 15 to calculate the following confidence intervals for μ assuming the sample is from a normal population.(a) 90 percent confidence. (Round your answers to 4 decimal places.)The 90% confidence interval is from to_____________.(b) 95 percent confidence. (Round your answers to 4 decimal places.)The 95% confidence interval is from to_____________.(c) 99 percent confidence. (Round your answers to 4 decimal places.)The 99% confidence interval is from to_____________.(d) Describe how the intervals change as you increase the confidence level.A. The interval gets narrower as the confidence level increases.B. The interval gets wider as the confidence level decreases.C. The interval gets wider as the confidence level increases.D. The interval stays the same as the confidence level increases
General
4 months ago
Two balls are selected at random from an urn that contains five white balls and eight red balls. Let the random variable X denote the number of white balls drawn times the number of red balls drawn. Find the probability distribution. (Order your answers from smallest to largest x-value. Round your answers to four decimal places.)
General
4 months ago
A simple random sample of 81 8th graders at a large suburban middle school indicated that 85% of them are involved with some type of after school activity. Find the 99% confidence interval that estimates the proportion of them that are involved in an after school activity.
General
4 months ago
you are asked to work on a project for a company.the company offers to pay you with two different plans.first plan is to pay you 450 per week.second plan is an hourly wage of $10.both plans come with a $200 bonus and a 40 hour work week fir a month. the monthly business cycle is 4 weeks. write linear equations to represent each pay plan
General
4 months ago
What is the sum of the exterior angles of a hexagon? Explain your answer.
General
4 months ago
The half-life of a radioactive material is 3175 years. If there is 400 grams of the radioactive material today, when would there be 25 grams still radioactive?
General
4 months ago
It is snowing and salt trucks aredumping a mixture to help. When themixture is dumped from a truck, itforms a mound with a conical shape. Ifthe mound has a diameter of 15 feetand a height of 10 feet, how muchsalt-sand mixture is there?
General
4 months ago
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