# Presented below test of h 0 100 versus h 1 100 sample

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presented below. Test of H 0 : 100 versus H 1 : 100 Sample mean 98.5 Std error of mean 0.777 Assuming the life length of batteries is normally distributed, if you wish to conduct this test using a .05 level of significance, what is the critical value that you should use? Place your answer, rounded to 3 decimal places in the blank. For example, -1.234 would be a legitimate entry. -1.729
Question 17 of 20 1.0/ 1.0 Points Accepted characters : numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation). NOTE: For scientific notation, a period MUST be used as the decimal point marker. Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values. For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not. Suppose a firm that produces light bulbs wants to know whether it can say that its light bulbs typically last more than 1500 hours. Hoping to find support for their claim, the firm collects a random sample of n = 25 light bulbs and records the lifetime (in hours) of each bulb. The information related to the hypothesis test is presented below. Test of H 0 : 1500 versus H 1 : > 1500 Sample mean 1509.5 Std error of mean 4.854 What is the test value that you would use to conduct this test? Place your answer, rounded to 3 decimal places in the blank. For example, 1.234 would be a legitimate entry. 1.957
Part 3 of 3 - 3.0/ 3.0 Points Question 18 of 20 1.0/ 1.0 Points An alternative or research hypothesis is usually the hypothesis a researcher wants to prove.
Question 19 of 20 1.0/ 1.0 Points If a null hypothesis about a population proportion p is rejected at the 0.025 level of significance, then it must also be rejected it at the 0.05 level.
Question 20 of 20 1.0/ 1.0 Points Sample evidence is statistically significant at the level only if the p–value is larger than . True False Answer Key: False