The lifetime of a certain type of battery is normally distributed with mean value 15 hours and standard deviation 1 hour. There are nine batteries in a package. What lifetime value (in hours) is such that the total lifetime of all batteries in a package exceeds that value for only 5% of all packages? (Round your answer to two decimal places.) USE SALT hours
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- 210 people are asked how many siblings they have? # of Siblings Frequency Relative Frequency Cumulative Frequency 0 0.2286 48 1 40 0.1905 88 2 34 122 3 54 0.2571 176 4 34 0.1619 a. Complete the table (Use 4 decimal places when applicable) b. What percent of the people have exactly four siblings? %Find the explained variation, unexplained variation, total variation, coefficient of determination, and standard error of estimate. Round to a minimum of 4 decimal places, if necessary.Eight different second-year medical students took blood pressure measurements of the same patient and the results are listed below. Systolic 131 130 120 139 145 129 146 121 Diastolic 88 96 81 99 98 86 98 79 Explained variation ? Unexplained variation ? Total variation ?e table below shows the life expectancy for an individu rs. ear of Birth Life Expectancy 930 59.7 940 62.9 950 70.2 965 69 7
- Joshua went to a doctor's appointment yesterday. He was weighed and the paperwork said that his weight put him in the 35th percentile for weight. This means that for all [gender] that were weighed at the same [age], [per]% of them weighed [compare] Joshua. Question options: [gender] boy [gender] girls [gender] all kids [age] day [age] week [age] age [per] 35 [per] 65 [compare] more than [compare] less than [compare] the same asIn a student survey, forty-one part-time students were asked how many courses they were taking this term. The (incomplete) results are shown below: Please round your answer to 4 decimal places for the Relative Frequency if possible. # of Courses Frequency Relative Frequency Cumulative Frequency 1 15 0.3659 15 2 12 0.2927 ? 3 ? ? 41 What percent of students take exactly one courses ? %construct a 90% condifence interval for the population mean of total calcium in this patient blood
- The time it takes an employee to package the components of a certain product is normally distributed with ? = 7.5 and ? = 1.5 minutes. As an incentive, management has decided to give a bonus to the 25% of employees who took the shortest amount of time to package the components. Find the amount of time taken to package the components that will indicate that an employee should get a bonus. (Round your answer to two decimal places.) An employee must package components in a time minutes.A scale is known to be "low-calibrated" in that it measures an aluminum bar to be 4 grams lower than the actual weight. If ????μold is the mean of all possible measurements of the bar using the old calibration, and ????μnew is the mean of all possible measurements of the bar using a re-calibrated scale. It is desired that ????−????=4μnew−μold=4. Consider the test ?0:????−????=4H0:μnew−μold=4 vs. ?0:????−????≠4H0:μnew−μold≠4 Sample after calibration: mean is 95.8 , SD is 4.9 and sample size is 10 Sample before calibration: mean is 89.352 , SD is 4.2 and sample size is 62 We do not know population standard deviations. What is the p-value? (Hint: best to use software, or else the Desmos Calculator for the 2 sample T and Z test)230 people are asked how many siblings they have? # of Siblings Frequency Relative Frequency Cumulative Frequency 0. 0.2087 48 1 49 0.213 97 40 0.1739 137 49 4 44 0.1913 230 a. Complete the table (Use 4 decimal places when applicable) b. What percent of the people have exactly two siblings? %
- The accompanying table contains data on the weight, in grams, of a sample of 50 tea bags produced during an eight-hour shift. Complete parts (a) through (d). Click the icon to view the data table. (Round to two decimal places as needed.) Find the p-value. p-value = .819 (F State the conclusi Do not reject H b. Construct a 90 The 90% confider (Round to four de Interpret the 90% More Info Tea Bag Weight (in grams) 5.65 5.45 5.42 5.41 5.53 5.34 5.54 5.46 5.53 5.59 5.42 5.51 5.55 5.54 5.61 5.56 5.47 5.44 5.49 5.39 5.46 5.63 5.53 5.32 5.68 5.29 5.49 5.76 5.56 5.41 5.57 5.59 5.52 5.33 5.49 5.54 5.61 5.44 5.45 5.24 5.56 5.63 5.49 5.58 5.68 5.43 5.49 5.57 5.58 5.35 I XThe frequency table below gives the frequency of exam scores rounded to the nearest 5%. Find the mean and round to one decimal place as needed. Number Percentages of on an Exam 65 70 75 80 85 90 95 100 Students 4 8 7 11 9 7 2 2Strictly homework not quiz thanks!