sample data resulted in sample the mean temperature of humans is less than 98.6°F at the a = 0.01 level of significance. State the hypotheses. Ho = 98.6°F H1 < 98 6°F Find the test statistic. (Round to two decimal places as needed.)
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- Ho;p=0.77 H1;p>077 your sample consists of 136 subjects, with 100 sucesses calculate the t statistics rounded to 2 decimal placesIQ scores are normally distributed with a mean of 100 and standard deviation 16. Calculate the z-score for an IQ of 76. Include one decimal place in your answer. Add your answerUse technology to help you test the claim about the population mean, μ, at the given level of significance, α, using the given sample statistics. Assume the population is normally distributed. Claim: μ>1230; α=0.09; σ=203.58.Sample statistics: x=1255.28, n=275 A. Calculate the standardized statistic B. Determine P value C. Determine the outcome and conclusion of the test Please show me how you solved the problem.
- Jse the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 64 miles per hour, with a standard deviation of 4 miles per hour. Estimate the percent of vehicles whose speeds are between miles per hour and 72 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately % of vehicles travel between 56 miles per hour and 72 miles per hour.The distribution of heights in a population of women is approximately normal. Sixteen percent of the women have heights less than 62 inches. About 97.5% of the women have heights less than 71 inches. Use the empirical rule to estimate the mean and standard deviation of the heights in this population. Mean: K inches Standard Deviation: inchesH0: μ ≤ 16.09 vs. HA: μ > 16.09What is the test statistic for sample of size 25, mean 13.97,and standard deviation 1.48?
- Interstate Speeds It has been reported that the standard deviation of the speeds of drivers on Interstate 75 near Findlay, Ohio, is 8 miles per hour for all vehicles. A driver feels from experience that this is very low. A survey is conducted, and for 29 drivers the standard deviation is 9.9 miles per hour. At =α0.10, is the driver correct? Assume the variable is normally distributed. State the hypotheses and identify the claim with the correct hypothesis. H0: H1: Claim or Not a Claim? This Hypothesis test is one-tailed or two-tailed? What is the Critical Value?Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 71 miles per hour, with a standard deviation of 5 miles per hour. Estimate the percent of vehicles whose speeds are between 61 miles per hour and 81 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately ________ % of vehicles travel between 61 miles per hour and 81 miles per hour.Assume that a randomly selected subject is given a bone density test. Bone density test scores are normally distributed with a mean of 0 and a standard deviation of 1. Draw a graph and find P7, the 7th percentile. This is the bone density score separating the bottom 7% from the top 93%. Which graph represents P7? Choose the correct graph below. A. P7 The bone density score corresponding to P7 is (Round to two decimal places as needed.) B. A P7 2 C. ^ P7 Ly D. A P7
- P Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Dra a graph and find the bone density test scores that can be used as cutoff values separating the lowest 17% and highest 17%, indicating levels that are too low or too high, respectively. Sketch the region. Choose the correct graph below. O A. OB. ..... OC. Dz "z- The bone density scores are (Use a comma to separate answers as needed. Round to two decimal places as needed.) OD. étv MacBook Pro Next 6.7530.758O. 21 rer website name V & 9 207 30 ) 6 ( | H 99 ToScores on a standardized exam are normally distributed with a mean of 517 and a standard deviation of 60. The figure below shows the distribution of the scores on a standardized exam. Cal- culate the shaded area under the curve. Express your answer in decimal form accurate to at least two decimal places. Answer: 397 457 The Scores on a Standardized ExanA company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 129.5-cm and a standard deviation of 0.8-cm. For shipment, 27 steel rods are bundled together.Find P69, which is the average length separating the smallest 69% bundles from the largest 31% bundles.P69 = ________-cmEnter your answer as a number accurate to 2 decimal place. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.