Astigmatism is measured in diopters. A perfect eye with no astigmatism has 0 diopters while people with a measurement of 1.5 or more typically need contacts or eyeglasses to have clear vision. A sample of 50 students with glasses determined their level of diopters. The sample mean is found to be 1.795 diopters with a sample standard deviation of 0.356. Determine if this is significantly more than as compared to the typical measurement of 1.5 diopters.

Q: Humerus bones from the same species of animal have approximately the same length-to-width ratios. It…

A: Solution: Given information: n= 100 Sample size  x= 5.6 Sample mean s= 0.25 Sample standard…

Q: verage will decline if the patient is immediately told the truth about the injury. The EMT randomly…

A: As per Bartleby guideline expert have to answer first three subparts only dear student please upload…

Q: It takes an average of 14.5 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: As per our guidelines we can solve first three sub part of question and rest can be reposted.…

Q: It takes an average of 9.4 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: As per guideline éxpert have to answer first 3 subparts only.

Q: The number of ants in a group is normally distributed with a mean of 67.0 and a standard deviation…

A: Let X be the random variable for the number of ants in a group. Given that, X~N(μ=67.0, σ=83.64)…

Q: The weights of adult California Condors average 14.8lbs with a standard deviation of 3.25lbs.…

A:

Q: Suppose the heights of 10-year-old boys in the US vary according to a normal distribution with a…

A: The objective of this question is to find the percentile of a boy with a height of 140 cm given that…

Q: A student received a grade of 82 on an exam in a large course. Standardizing this mark gave the…

A:

Q: support the scientist’s estimate

A: A scientist estimates that the mean nitrogen dioxide level in Westman is greater than 28 parts per…

Q: The scores on a standardized test are normally distributed with a mean of 115 and standa deviation…

A: Z = 2.2 , μ  = 115 , σ= 15

Q: It takes an average of 11.5 minutes for blood to begin clotting after an injury.  An EMT wants to…

A: Sample size n=59 Sample mean=12.3 Population standard deviation =2.35 NOTE:- According to bartleby…

Q: The state of California had a mean annual rainfall of 23 inches and a standard deviation of 4…

A: Answer: From the given data, Let X denotes the mean annual rainfall of California Here, X is…

Q: to begin otting after an injury. average will change if the patient is immediately told the truth…

A:

Q: The nails produced by a machine are assumed to have a mean of 5.0 cm. A random sample of 80 nails…

A: Null hypothesis: H0: µ=5. Alternative hypothesis: H1:µ>5. This is a right tailed test. Here, the…

Q: Suppose that striped dolphin lengths are normally distributed with a population standard deviation…

A: The formula for the minimum sample size is as follows: Here, zα/2 is the critical value at 95%…

Q: umerus bones from the same species of animal have approximately the same length-to-width ratios. It…

A:

Q: ble and highest possibel marks assuming normal distributiion .

A: P(X<5)=Pz<5-589=0

Q: A dataset has a mean of 48.1 and a standard deviation of 6.3. What is the z-score of the value 18.5,…

A: Solution  Given That, A dataset has a mean of 48.1 and a standard deviation of 6.3. What is the…

Q: samples of n = 100 from

A:

Q: A particular fruit's weights are normally distributed, with a mean of 659 grams and a standard…

A: From the provided information, Mean (µ) = 659 grams Standard deviation (σ) = 7 grams Let X be a…

Q: It takes an average of 10.4 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: Givensample size(n)=67Mean(x)=10.8standard deviation(s)=2.94α=0.05claim is to see if the average…

Q: The lengths of individual fish in a pond have a non-Normal distribution with a mean of 18.6 cm and a…

A:

Q: Assume the mean length of a the female foot is roughly 9.58 in. with a standard deviation of 0.51…

A: From the given information, the mean of 9.58 and a standard deviation of 0.51. The  standard…

Q: Assume that a sample is used to test a normal population mean(μ). A sample of size 33 with a mean of…

A: Answer: From the given data, Sample size(n) = 33 mean (X¯) = 26.2 Standard deviation (S) = 5.4 μ =…

Q: The average score on an test of sustained attention is 30 with a standard deviation of 5. A…

A:

Q: Condé Nast Traveler conducts an annual survey in which readers rate their favorite cruise ship. All…

A: given, Group1: The ships carry 500 passengers Sample size n1=37 Sample average rating x¯1=85.39…

Q: It takes an average of 12.8 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: From part (c) we have test statistic t = 2.072

Q: Suppose that another sample of resting heart rates for five Math students was obtained: 72, 68, 66,…

A: From the given data we want to know the data value .

Q: It takes an average of 9.9 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: The level of significance is 0.01.

Q: e diameters of Douglas firs grown at a Christmas Tree Farm are normally distributed with a mean of 4…

A: GIVEN DATA, normal distributionμ=4σ=1.5we have to find out the given probabilities.

Q: Suppose the mean blood glucose of a population of adults is 162 with a standard deviation of 58.…

A:

Q: fitness center is interested in finding a 95% CI for the mean number of days per week that Americans…

A: Given: Xˉ=3.2 s=2.6 n=248  Confidence level = 95% As the population standard deviation is not known,…

Q: A researcher would like to know if a vegan diet will lower cholesterol. A sample of n = 9 adults is…

A:

Q: It takes an average of 11.6 minutes for blood to begin clotting after an injury. An EMT wants to see…

A: The sample size n is 40.

Q: A lightbulb is advertised as lasting 1000 hours with a standard deviation of 150 hours. Assume the…

A: It is given that the mean and standard deviation are 1,000 and 150, respectively.

Q: All the houses in Stanton county have a mean size of 1650 square feet with a standard deviation of…

A:

Q: It takes an average of 14.6 minutes for blood to begin clotting after an injury. An EMT wants to see…

A:

Q: If a sample of 144 male weights has a mean of 266 pounds and standard deviation of 32 pounds. The CV…

A: Given data Mean (x̅ ) = 266Standard deviation (s) = 32Coefficient of variation(CV) for sample is…

Q: Adult women in the U.S. have a mean height of 64.3", with a standard deviation of 2.58 inches.…

A: