99% 95% 90% 1% 5% 10% Left- tailed Sketch of the Curve Right Tailed Sketch of the Curve Sketch of the Curve Confidence Level Significance Level One-tailed Two-tailed curve on the Significance level with Corresponding Z-values. COMPLETION TEST. Fill in the missing values
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- According to the Distribution of Z table, ______ % of area is below a Z value of -0.50?Please complete the following exercises according to Areas under the normal curve table. Find the area under the normal curve for:a)Mean and z=1.49b)Mean and z=1.26c)z=1 and z=2d)z=-1 and z=+1e)Z=-1and z=-1.262Cam and Denise wish to check the data from their labexperiment to see if the distribution is approximatelyNormal. Which of the following would be most useful forassessing normality?A) boxplotB) stem and leaf plotC) bar graphD) scatterplotE) residuals plot
- Use the Weibull distribution to model ocean wave heights. Assume that the mean wave height at the observation station is 2.5 meters and the shape parameter equals 2. Determine the standard deviation of wave height.For normally distributed data, what is the area greater than z = 0.34?The sample mean x (with a bar above) is the best point estimate of the sample mean u (mu) True or false?
- In the 2015 AFC Championship game, there was a charge that the New England Patriots underinflated their footballs for an advantage. The Patriots' opponents during the championship game were the Indianapolis Colts. Measurements of the Colts' footballs were taken. The balls should be inflated to between 12.5 and 13.5 pounds per square inch (psi). The accompanying data consists of six of the eight measurements on the Colts' footballs. Complete parts (a) and (b) below. 12.75, 12.50, 12.15, 12.35, 12.55, 12.30 The test statistic is = (Round to two decimal places as needed.) The p-value is = (Round to three decimal places as needed.) b. Use the data to construct a 95% confidence interval for the mean psi for the Colts' footballs. How does this confidence interval support your conclusion in part (a)? The 95% confidence interval is ___ psi to ___ psi. (Round to two decimal places as needed. Use ascending order.)The approximate Z-score that corresponds to a right tail area of 0.42 isFind the percent of the total area under the standard normal curve between the following z-scores. z=−1.2 and z=−0.65
- A law enforcement organization claims that their radargun is accurate to within 0.5 miles per hour for a courthearing. An independent organization hired to test theaccuracy of the radar gun conducted 12 tests on a projectilemoving at 60 miles per hour. Given the data inthe following table, determine if the radar gun can beused in court. State the hypothesis and base your commentson an appropriate α level.An ecologist hypothesizes that birds with longer wing spans use wider tree branches. The ecologist captured male birds, measured their wing span and other characteristics in millimeters, and then marked and released them. During the ensuing winter, the ecologist repeatedly observed the marked birds as they foraged for food on tree branches. He noted the branch diameter on each occasion, and calculated the average branch diameter for each bird in centimeters. The measurement data are below. What can the ecologist conclude with an α of 0.05 wing span branch diameter 79.380.180.781.579.580.781.180.580.7 1.561.531.391.041.391.021.211.311.21 A) What is the appropriate statistic? Then Compute the statistic B) Compute the appropriate test statistic(s) for H1: ρ > 0 critical value = test statistic= C) Effect SizeFind the z score that has 11.9% of the distribution area to its left