Compute the Standard deviation from the following dat=
Q: Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2900 grams…
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Q: In a random sample of 8 cell phones, the mean full retail price was $529.50 and the standard…
A: It is given that n=8, x=529.5, s=178 and μ=433.99. The degree of freedom=n-1=8-1=7
Q: Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and…
A: Suppose that the random variable x defines the weight of babies.
Q: Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean…
A: Obtain the two readings that are cutoff values separating the rejected thermometers from the others.…
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A: The pooled variance is, sp2=n1-1s12+n2-1s22n1+n2-2=85-116.42+60-118285+60-2=291.6688 The pooled…
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A: Given,mean(μ)=74500
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Q: Suppose a randomly selected sample of n = 36 men has a mean foot length of x = 27.5 cm, and the…
A: Given data: Sample size = 36 Mean = 27.5 cm Sample standard deviation = 2 cm
Q: Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and…
A: We have given that. 1) for 32 to 35 weeks μ =2700 , ? =600 ,X=2825 2) for 40 weeks μ…
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A: Standard deviation:Standard deviation helps to identify the spread of data for a group from the…
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Q: Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2500 grams and…
A: Given that: Population Baby's average weight when they are delivered after 32 to 35 weeks of…
Q: According to a study, the salaries of registered nurses are normally distributed with a mean of…
A: Given Data : Population Mean,μ = 58310 Population Standard Deviation,σ = 5038
Q: Suppose there are two different vaccines for Covid. Vaccine X and Vaccine Y. An interesting question…
A: Solution: Given information: n1= 78 Sample size of vaccine X n2= 93 Sample size of vaccine Y x =151…
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A: Given information- Sample size, n = 40 Sample mean, x-bar = (17+0.75) mpg Population standard…
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A: GivenFor BostonMean(μ)=6200standard deviation(σ)=8000For chicagoMean(μ)=48000standard…
Q: A random sample of 16 adult male wolves from the Canadian Northwest Territories gave an average…
A: x¯1=97, s1=6.3, n1=16x¯2=88, s2=7.1, n2=22 Let μ1 represent the population mean weight of adult male…
Q: na random sample of 9 cell phones, the mean full retail price was $509.10 and the standard deviation…
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Q: What theorem will let us treat T and M as approximately normal random variables? Central Limit…
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A: A hypothesis testing is a statistical procedure in which a choice is made about two competing…
Q: A town’s December high temperatures average 46 oF with a standard deviation of 9 oF, while in June…
A: Given Mean 1=46 Mean2=75 Standard deviation 1=9 Standard deviation 2=8
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Q: The mean of the commute time to work for a resident of a certain city is 27.3 minutes. Assume that…
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- In a sample of 14 randomly selected high school seniors, the mean score on a standardized test was 1197 and the standard deviation was 166.9. Further research suggests that the population mean score on this test for high school seniors is 1018. Does the t-value for the original sample fall between -to.95 and to.95? Assume that the population of test scores for high school seniors is normally distributed. fall between -to.95 and to.95 because to.95 = The t-value of t= (Round to two decimal places as needed.) CThe brain volumes (cm) of 50 brains vary from a low of 906 cm" to a high of 1488 cm. Use the range rule of thumb to estimate the standard deviation s and compare 3 13 the result to the exact standard deviation of 171.4 cm", assuming the estimate is accurate if it is within 15 cm 3 The estimated standard deviation is cm. (Type an integer or a decimal Do not round.) Compare the result to the exxact standard deviation. A. * The approximation is not accurate because the error of the range rule of thumb's approximation is less than 15 cm 13 The approximation is accurate because the error of the range rule of thumb's approximation is less than 15 cm cm³ OC. 3. The approximation is not accurate because the error of the range rule of thumb's approximation is greater than 15 cm 3 9 . The approximation is accurate because the error of the range rule of thumb's approximation is greater than 15 cm". cm³ in el Cick to select your answer(s). er javascript:doBxercise(3)- selected from a set of...…The visibility standard index (VSI) is a measure of Denver air pollution that is reported each dayto theDenver Post. The index ranges from 0 (excellent air quality) to 200 (very bad air quality).During the winter months, when air pollution is higher, the index has a mean of about 90 (rated as fair) with a standard deviation of approximately 30. Suppose that for 15 days (during the winter), the following VSI measures were recorded each day. Day 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 VSI 80 115 100 90 15 10 53 75 80 110 165 160 120 140 195 a) Make a control chart for the VSI, and plot the above data on the control chart. Besure to include the horizontal lines on the control chart b) identify all out-of-control signals (above or below the mean) that you find in the control chart by type (Type I, II, or III)
- Suppose the scores of students on an exam are Normally distributed with a mean of 522 and a standard deviation of 83. Then approximately 99.7% of the exam scores lie between the numbers such that the mean is halfway between these two integers. and ☐Assume that the readings at freezing on a bundle 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.If 4.1% of the thermometers are rejected because they have readings that are too high and another 4.1% are rejected because they have readings that are too low, find the two readings that are cutoff values separating the rejected thermometers from the others.interval of acceptable thermometer readings = _________ °CAssume that the readings at freezing on a bundle 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.If 4.8% of the thermometers are rejected because they have readings that are too high and another 4.8% are rejected because they have readings that are too low, find the two readings that are cutoff values separating the rejected thermometers from the others.interval of acceptable thermometer readings =_____________ °C
- The times to pop a regular bag of microwave popcorn without burning it are Normally distributed with a mean time of 140 seconds and a standard deviation of 20 seconds. The times to pop a mini bag of microwave popcorn, without burning it, are Normally distributed with a mean time of 90 seconds and a standard deviation of 15 seconds. Suppose two independent random samples, 25 of each, are taken and the mean popping times are calculated. Let R = the popping time of a randomly selected regular-sized bag and M = the popping time of a mini-sized bag. Which of the following best describes the mean of the sampling distribution of ? A) –50 B) 50 C) 90 D) 140Suppose that the hemoglobin levels among healthy females are normally distributed with a mean of 14.1 gdL. Research shows that exactly 95% of healthy females have a hemogoblin level of 16.1 gdL. What is the standard deviation of the distribution of hemoglobin levels and healthy females. Carry you intermediate computations to atleast four decimal places, and round your answer to at least two decimal places.What two values are needed to define any normal curve?
- The mean score on a driving exam for a group of driver's education students is 60 points, with a standard deviation of 3 points. Apply Chebychev's Theorem to the data using k=2. Interpret the results. At least ( )% of the exam scores fall between ( )and ( )Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2800 grams and a standard deviation of 900 grams while babies born after a gestation period of 40 weeks have mean weight of 3400 grams and a standard deviation of 445 grams. If a 33-week gestation period baby weighs 2625 grams and a 41-week gestation period baby weighs 3225 grams, find the corresponding z-scores. Which baby weighs less relative to the gestation period? Find the corresponding z-scores. Which baby weighs relatively less? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) OA. The baby born in week 33 weighs relatively less since its z-score, OB. The baby born in week 33 weighs relatively less since its z-score, OC. The baby born in week 41 weighs relatively less since its z-score, OD. The baby born in week 41 weighs relatively less since its z-score, is smaller than the z-score of is larger than the z-score of is…Agricultural scientists are testing a new chicken feed to see whether it increases the number of eggs laid. The scientists divided a flock in half and gave half of the chickens the new feed, while the other half were given a regular feed. The eggs laid in a one-year period for a random sample of 10 chickens using the new feed and 10 chickens using the regular feed are recorded. Assume that the population standard deviation of number of eggs laid is 12 eggs per year for both groups and that the number of eggs laid per year is normally distributed. Let the chickens given the new feed be the first sample, and let the chickens given the regular feed be the second sample. The scientists conduct a two-mean hypothesis test at the 0.05 level of significance to test if there is evidence that the new feed increases the number of eggs laid. (a) Which answer choice shows the correct null and alternative hypotheses for this test? Select the correct answer below: H0:μ1=μ2;…
