A random sample of 30 adult bottlenose dolphin was found to have a mean weight of 550 pounds with a standard deviation of 50 pounds. What will be the range of values for the estimate with a 90% confidence level? In answer box, provide only the high value.  Round the answer to 2 decimal places.

Q: The SAT math scores of a particular high school in New Jersey are approximately normally…

A: From the empirical rule we know that 95% of the observations falls in (µ-2σ,µ+2σ)  Where µ is the…

Q: Margin of Error 3. In a sample of 120 jeepneys with a standard deviation of 35km/h speed. Find the…

A: Given, sample size = 120 standard deviation = 35 confidence level = 90% Critical value for the 90%…

Q: You throw a ball as far as you can 5 times, recording the distance for each throw: 165 feet, 184…

A: since only 5 observation is given we will consider them as sample (n = 5)and population (N = 100)…

Q: The estimated standard deviation is°F. (Round to two decimal places as needed.) Compare the result…

A:

Q: A random sample of 45 cars in the drive-thru of a popular fast food restaurant revealed an average…

A: given that,population standard deviation, σ =4.89sample mean, x =17.79size (n)=45

Q: he distribution of heights of adult males has a mean of 69 inches and a standard deviation of 4…

A: Solution-: Let, X= The distribution of heights of adult males Given: (inches) We find, P[ he…

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: It is given that mean amount of food is 12 oz and number of dogs is 16. The sum of squared…

Q: The weight of football players is normally distributed with a mean of 200 pounds and a standard…

A: Given,mean(μ)=200standard deviation(σ)=25

Q: Assume that adults have IQ scores that are normally distributed with a mean of u = 105 and a…

A: Obtain the Z-score for the random variable X equals 129. The Z-score for the random variable X…

Q: find the z-number associated with a 92% level of confidence. find the z-number associated with a…

A:

Q: In 2011 the U.S. Department of Transportation reported with 95% confidence that the average length…

A: We have to find confidence Iinterval

Q: The average score on the Stats midterm was 70 points with a standard deviation of 6 points,…

A: Given that.   X~N( μ , ?)   μ=70    , ?=6  , Z-score = -1   Z-score =( x - μ )/?

Q: The Transport Network Vehicle Service (TNVS) drivers have an average booking of 22 rides a day with…

A: Here we have given the information, using this information we have to find the standard error of the…

Q: Below represents the amounts that a random sample of employees reported that they spent on dinner…

A:

Q: parent would spend on their child's birthday gift (use a 99% confidence level). Give your answers to…

A:

Q: Temperatures in a city are distributed approximately normal, with a mean of 69 degrees Fahrenheit…

A:

Q: A recent survey found that 61​% of all adults over 50 wear glasses for driving. In a random sample…

A: A recent survey found that 61​% of all adults over 50 wear glasses for driving. In a random sample…

Q: The average and standard deviation for ACT scores are 20 and 3 respectively. average and standard…

A:

Q: The average IQ of the adult population is 100. A researcher believes that average IQ of the…

A: The sample mean is calculated as follows: Mean = (69+79+89+99+109)/5           = 445/5           =…

Q: Adult men have an average height of 69.0 inches with a standard deviation of 2.8 inches. Find the…

A: The objective of this question is to find the height of a man given the z-score, the average height,…

Q: Adult men have an average height of 69.0 inches with a standard deviation of 2.8 inches. Find the…

A: given data, μ=69.0σ=2.8height of a man with a z-score of -1.75 =?

Q: mar is trying out to be a firefighter.  On the written exam, the mean of everyone who takes the test…

A: given data, μ=54.5σ=3.1Omar scores exactly 0.75 standard deviations above the mean z=0.75raw score…

Q: 5. Find the standard deviation. (Round to 3 decimals.)

A:

Q: A candy manufacturer has replaced 5.17% of their chocolate bars with a new mystery flavor. Find the…

A: Given: Sample size (n) = 424 p(chocolate bars with a new mystery flavor) = 5.17% = 0.0517

Q: To find an 88% confidence interval for mean body temperature of healthy US adult women using the…

A: Sample mean, x¯ = 98.382 sample standard deviation = s = 0.712 sample size, n = 50 Here the sample…

Q: The average hourly wage for manufacturing workers in the United States is $16.08 per hour, with a…

A: For the distribution (specified to be normal) of the hourly wage (in ) for manufacturing workers in…

Q: loaded my die so that the chance of a 1 is 0.1, the chance of a 6 is 0.2, and the chances of the…

A: Use ∑P(x) =1   to find the remaining probability

Q: Which is the best estimate for the number who bought fewer than 20 items during their trip? Rel f…

A: The histogram shows the number of items that customers bought during a trip to the grocery store one…

Q: As reported in Runner's World Magazine, the times of finishers in the New York City 10-km run are…

A: Given information- Population mean, µ = 60 minutes Population standard deviation, σ = 7 minutes Let,…

Q: The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances…

A:

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

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Q: he lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation…

A:

Q: Which graph represents P81? Choose the correct graph below. O A. O B. The temperature for P81 is…

A: Let Z denote the readings on the thermometre. Given that Z follows N(0,1)

Q: The mean time taken by all participants to run a road race was found to be 155 minutes with a…

A: Chebyshev's rule :  According to Chebyshev's rule, the probability that XX is within kk standard…

Q: The distribution of the scores on a standardized exam is approximately normal with mean 400 and…

A: The two values of Z that will contain 50% of scores lie are obtained as shown below:From the…

Q: me results of a certain medical test are normally distributed with a mean of 127 and a standard…

A: Given data,Mean μ=127sd     σ=12P(X>133)=?

Q: The standard deviation in the sample means is called the margin of error.

A: Answer : False  The given statement is incorrect.

Q: A California lake has been stocked with rainbow trout. These trout have an average length of 24…

A: Given Information: Mean μ=24 Standard deviation σ=3 Someone goes fishing and catches a trout that is…

Q: 3. In the population, the average IQ is 100 with a standard deviation of 15. A team of scientist…

A: Given information: x=140μ=100s=15n=35

Q: On a multiple choice test with 10 questions, each question has four possible answers, one of which…

A: