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- A recent newspaper article claims that 62% of car accidents involve some evidence of distracted driving. A police officer questions this claim, and pulls a random sample of 61 accident reports. If 43 of them involve distracted driving, is this enough evidence to show that the proportion of car accidents involve some evidence of distracted driving is significantly greater than than reported by the newspaper? (Use α=0.025) The test statistic = (please show your answer to 3 decimal places.) The p-value = (Please show your answer to 4 decimal places.)Suppose X is a non-standard normal variable, with a mean of 139, and std deviation of 15 (i.e. X~N(139,15)). You have an observation (z) on a standard normal scale (i.e. Z~N(0,1)). If z = 1.29, what is it on an X scale? How can I calculate this using excel & by hand?Assume that ui and µ2 are the averages of maximum speeds of new high-tech electric scooter types. Use the t test at significance level 0.01 to test Ho: µi - µ2 = -18 versus H.: μι - μ2<18 for the following data: ni = 6, x1=117.8, si=5.06, n2 = 6, xz= 128.2, and s2 = 5.28. (where n, , and s denote the sample size, sample mean and sample standard deviation respectively.) %3D
- The pulse rates of 176 randomly selected adult males vary from a low of 40 bpm to a high of 116 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 95% confidence that the sample mean is within 2 bpm of the population mean.For each of 12 organizations, the cost of operations per client was found, the 12 scores have a mean of $2133 and a standard deviation of $345. At a=0.01 test the claim of a stockholder who complains that the mean for all such organization exceeds $1,800 per client. what is the critical value and what t=You measure 38 textbooks' weights, and find they have a mean weight of 61 ounces. Assume the population standard deviation is 2.4 ounces. Based on this, construct a 99% confidence interval for the true population mean textbook weight.Give your answers as decimals, to two places < μμ <
- IN V> F. Use the EMPIRICAL RULE for the following question and give your answer to one decimal place: The mean birthweight of infants is 3152.0g with a standard deviation of 693.4g. out of Calculate the range of birthweights that will account for 68% of infants: Low value = grams High value = grams Calculate the range of birthweights that will account for 95% of infants: Low value = grams High value = grams Calculate the range of birthweights that will account for 99.7% of infants: LOw value = grams High value = grams prt sc home end F4 F5 %23 %24 2 6. 51 L. 3. 4. 9988 R. H. C. 8.You measure 23 textbooks' weights, and find they have a mean weight of 32 ounces. Assume the population standard deviation is 3.4 ounces. Based on this, construct a 99% confidence interval for the true population mean textbook weight. Give your answers as decimals, to two places < μμ<To determine if their 1.33 centimeter galvanized pipes are properly adjusted, Fogarty Manufacturing has decided to use an X-Chart which uses the range to estimate the variability in the sample. Answer How to enter your answer Step 3 of 7: What is the Lower Control Limit? Round your answer to three decimal places. 1 ~ 3 Sample Mean Sample Range 1.33 1.3320 1.29 1.38 1.3300 Period obs1 obs2 obs3 obs4 obs5 1.34 1.29 1.35 2 1.35 1.35 3 1.34 1.35 1.36 1.29 1.29 1.31 1.32 1.33 1.34 1.3360 1.35 1.30 1.3340 1.32 1.38 1.3260 1.37 1.33 1.31 1.31 1.29 1.30 1.35 1.31 1,32 1.34 1.38 8 1.35 1.33 1.31 1.34 1.3180 1.33 1.3300 1.34 1.37 1.28 1.36 9 10 1.32 1.37 1.30 1.37 1.29 1.32 1.30 1.28 1.29 11 1.35 1.36 1.38 12 1.36 1.32 1.31 1.30 1.35 13 1.29 1.35 1.32 1.32 1.37 1.35 1.35 1.34 1.32 1.34 14 15 1.32 1.36 1.29 1.32 1.35 45 Table 67 Control Chart 1.35 1.28 Copy Table Average Values The average of the selected cell(s) is 1.340. Copy Value 1.3300 1.3440 1.3080 1.3400 1.3280 1.3300 1.3400 1.3280 0.06…
- Instructor-created question Question Help A study of 420,051 cell phone users found that 132 of them developed cancer of the brain or nervous system. Complete parts (a) and (b). a. Use the sample data to construct a 90% confidence interval estimate of the percentage of cell phone uners who develop cancer of the brain or nervous system. (Round to three decimal places as needed.) b. Prior to this study of cell phone use, the rate of such cancer was found to be 0.0247% tor those not using cell phones Do cell phone users appear to have a rate of cancer of the brain or nervous system that is different from the rate of such cancer among those not using cell phones? Why or why not? OA. No, because 0.0247% is included in the confidence interval OB. Yes, because 0.0247% is included in the confidence interval OC. No, because 0 0247% is not included in the confidence interval. OD. Yes, because 0.0247% is not included in the confidence interval ntsA random sample of n = 16 mid-sized cars tested for fuel consumption gave a mean of x ¯ = 21.69 miles per gallon with a standard deviation of s = 2.51 miles per gallon. Assuming that the miles per gallon given by all mid-sized cars have a normal distribution, find a 99 % confidence interval for the population mean, μ .Round your answers to two decimal places.The level of calciumin the blood of healthy young adults follows aNormal distributionwithmean μ = 10milligrams per deciliter and standard deviation = 0.4. A clinicmeasures theblood calcium of 100 healthy pregnant young women at their first visit for prenatal care.The mean of these 100 measurements is ¯ x = 9.8. Is this evidence that the mean calciumlevel in the population of healthy pregnant young women is less than 10? To answer this,test the hypotheses H0 : μ = 10 versus Ha : μ < 10 at the 5% significance level.(a) What is the value of the P-value?(b) Determine which of the following statements is true.• H0 should be rejected.• H0 should not be rejected.• Ha should be rejected.• There is a 5% chance that the null hypothesis is true.