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According to a past survey, 23% of Americans have hypertension. After a stringent regimen of diet and exercise, 75 people were then tested and 18 were found to have hypertension. Based on this sample, does diet and exercise reduce hypertension? Use a significance level of 0.05.a) yesb) no
General
6 months ago
A polymer is manufactured in a batch chemical process. Viscosity measurements are normally made on each batch, and long experience with the process has indicated that the variability in the process is fairly stable with o 20. Fifteen batch viscosity measurements are given as follows: 724, 718, 776, 760, 745, 759, 795, 756, 742, 740, 761, 749, 739, 747, 742 A process change that involves switching the type of catalyst used in the process is made. Following the process change, eight batch viscosity measurements are taken: 735, 775, 729, 755, 783, 760, 738, 780 Assume that process variability is unaffected by the catalyst change. If the difference in mean batch viscosity is 10 or less, the manufacturer would like to detect it with a high probability. (a) Formulate and test an appropriate hypothesis using a 0.10. What are your conclusions? Find the P-value. (b) Find a 9096 confidence interval on the difference in mean batch viscosity resulting from the process change. (c) Compare the results of parts (a) and (b) and discuss your findings.
General
6 months ago
f(4) if f(x) = 3x - 1
General
6 months ago
33 divided by 2 long division
General
6 months ago
Bodens account has a principal of $500 and a simple interest rate of 3.3% . complete the double number line. HOW MUCH money will be in the account after 4 years, assuming Boden does not add or take out any money.
General
6 months ago
'Polonium-210 is a radioactive substance with a half-life of 138 days. If a nuclearfacility is handling 310 grams of polonium-210, then how many grams of polonium-210 will be left in 330 days. Round your answer 4 decimal places and remember touse labels.
General
6 months ago
A punch glass is in the shape of a hemisphere with a radius of 5 cm. If the punch is being poured into the glass so that the change in height of the punch is 1,5 cm/sec, at what rate is the exposed area of the punch changing when the height of the punch is 2 cm.
General
6 months ago
Show that if X is a geometric random variable with parameter p, thenE[1/X]= −p log(p)/(1−p)Hint: You will need to evaluate an expression of the formi=1➝[infinity]∑(ai/ i)To do so, writeai/ i=0➝a∫(xi−1) dx then interchange the sum and the integral.
General
6 months ago
A survey of 1010 college seniors working towards an undergraduate degree was conducted. Each student was asked, "Are you planning or not planning to pursue a graduate degree?" Of the 1010 surveyed, 658 stated that they were planning to pursue a graduate degree. Construct and interpret a 98% confidence interval for the proportion of college seniors who are planning to pursue a graduate degree. Round to the nearest thousandth.
General
6 months ago
Based on a poll, 67% of Internet users are more careful about personal information when using a public Wi-Fi hotspot. What is the probability that among four randomly selected Internet users, at least one is more careful about personal information when using a public Wi-Fi hotspot? How is the result affected by the additional information that the survey subjects volunteered to respond?
General
6 months ago
PLEASE HELP! 100 POINTS!!+ BRAINLIEST!!Two wires help support a pole. The wire at point A forms an angle of 54° with the ground and the wire at point B forms an angle of 72° with the ground. The distance between the wires on the ground is 23 m. Find the height of the pole to the nearest tenth of a meter.
General
6 months ago
How to calulate the area of a square with a perimeter of 60 inches
General
6 months ago
During the first half of a college basketball game, 24,196 people entered the athletic center. During the second half, 2,914 people left and 4,819 people entered. How many people were in the athletic center at the end of the game?
General
6 months ago
10 5/12- 12 7/12 = in simplest form
General
6 months ago
A solid lies between planes perpendicular to the y-axis at yequals0 and yequals2. The cross-sections perpendicular to the y-axis are circular disks with diameters running from the y-axis to the parabola x equals StartRoot 6 EndRoot y squared. Find the volume of the solid.
General
6 months ago
The managers want to know how many boxes of 12 cookies can be filled with the 3,258 cookies that have been baked. Fatima starts by subtracting the largest number of boxes she can easily calculate. She knows that 100 boxes of 12 cookies can be put into one crate. How many crates can be filled from the total of 3,258 cookies?
General
6 months ago
the height of woman ages 20-29 is normally distributed , with a mean of 64.4 inches. assuming the standard diviation = 2.3 inches. are you more likely to randomly select 1 woman with a height less than 64.9 inches or are you more likely to select a sample of 22 woman with a mean height less than 64.9 inches.(USING STANDARD NORMAL TABLE)A. what is the probability of randomly selecting 1 woman with a height less than 64.9 inches?B. what is the probability of selecting a sample of 22 woman with a mean height less then 64.9 inches?C. are you more likely to randomly select 1 woman with a height less than 64.9 inches or are you more likely to select a sample of 22 woman with a mean height of 64.9 inches?
General
6 months ago
Simplify 5 x times the fraction 1 over x to the power of negative 7 times x to the power of negative 2. 5x 5x−6 5 5x6
General
6 months ago
PLEASE HURRY!!Two hot air balloons are traveling along the same path away from a town,beginning from different locations at the same time. Henry's balloon begins30 miles from the town and is 48 miles from the town after 2 hours. Thedistance of Tasha's balloon from the town is represented by the function y =8x+ 20.Whích balloon was farther from the town at the beginning, and which traveledmore quickly?OA. Tasha's balloon was farther from the town at the beginning, butHenry's balloon traveled more quickly.OB. Tasha's balloon was farther from the town at the beginning, and ittraveled more quickly.OC. Henry's balloon was farther from the town at the beginning, butTasha's balloon traveled more quickly.OD. Henry's balloon was farther from the town at the beginning, and ittraveled more quickly.
General
6 months ago
A person is watching a boat from the top of a lighthouse. The boat is approaching the lighthouse directly. When first noticed, the angle of depression to the boat is 18°33'. When the boat stops, the angle of depression is 51°33'. The lighthouse is 200 feet tall. How far did the boat travel from when it was first noticed until it stopped? Round your answer to the hundredths place.
General
6 months ago
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