Express the confidence interval 0.222
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- Please answer within 30min thanks.Test a claim that the mean amount of lead in the air in U.S. cities is less than 0.036 microgram per cubic meter. It was found that the mean amount of lead in the air for the random sample o 57 U.S. cities is 0.039 microgram per cubic meter and the standard deviation is 0.069 microgram per cubic meter. At α=0.10, can the claim be supported? Complete parts (a) through (e) below. Assume the population is normally distributed.Test a claim that the mean amount of lead in the air in U.S. cities is less than 0.036 microgram per cubic meter. It was found that the mean amount of lead in the air for the random sample of 57 U.S. cities is 0.039 microgram per cubic meter and the standard deviation is 0.067 microgram per cubic meter. At α=0.10, can the claim be supported? Complete parts (a) through (e) below. Assume the population is normally distributed. Question content area bottom Part 1 (a) Identify the claim and state H0 and Ha. H0: ▼ pp muμ sigma squaredσ2 sigmaσ ▼ not equals≠ greater than> less than or equals≤ less than< equals= greater than or equals≥ enter your response here Ha: ▼ muμ sigma squaredσ2 pp sigmaσ ▼ not equals≠ equals= greater than or equals≥ greater than> less than or equals≤ less than< enter your response here (Type integers or decimals. Do not round.) The claim is the ▼ null alternative…
- In the experiment, you repeated measurements 8 times for a resistor. After data processing, you determined that the standard deviation of the measurement is 2.80. What is the 95% confidence range of the result? O ±2.8N +1.94N +5.45N O ±8Nhis S alt Use the given information to find the number of degrees of freedom, the critical values x and x. and the confidence interval estimate of g. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Platelet Counts of Women 98% confidence; n=23, s=65.6. 3 Click the icon to view the table of Chi-Square critical values. df = (Type a whole number.) View an example Get more help - E D $ C 4 C R F % 5 V H T G 40 6 B Y & H 7 U N 4+ * J 8 T M hp ( V 9 K < O ► 11 ) O L alt P ctrl ? { ( / + = < } prt sc ] pause ← ← Clear all delete backspace T 1 enter E 9:20 PM AC 10/26/2022 T shift home num lock 7 home 4 Check answer 1 end end 1 8 00+ 5 O ins og up 2 ↓ * 9 pg up 6 → pg dn 3 pg dn del enterI need help with stats/2023, section 7.2 and 7.3, please help with TI-84 commands A car company says that the mean gas mileage for its luxury sedan is at least 22 miles per gallon (mpg). You believe the claim is incorrect and find that a random sample of 5 cars has a mean gas mileage of 21 mpg and a standard deviation of 5mpg. At α=0.10, test the company's claim. Assume the population is normally distributed. Which sampling distribution should be used and why? A. Use a normal sampling distribution because the population is normal, and σ is known. B. Use a normal sampling distribution because the population is normal, and σ is unknown. C. Use a t-sampling distribution because the population is normal, and σ is unknown. D. Use a t-sampling distribution because n<30. E. Use a t-sampling distribution because the population is normal, and σ is known F. Use a normal sampling distribution because n>30. Write out the appropriate hypotheses…
- Test a claim that the mean amount of lead in the air in U.S. cities is less than 0.038 microgram per cubic meter. It was found that the mean amount of lead in the air for the random sample of 56 U.S. cities is 0.038 microgram per cubic meter and the standard deviation is 0.068 microgram per cubic meter. At alphaαequals=0.01, can the claim be supported? Complete parts (a) through (e) below. Assume the population is normally distributed. d) Decide whether to reject or fail to reject the null hypothesis. ▼ Fail to reject Reject Upper H 0H0 because the standardized test statistic ▼ is is not in the rejection region. (e) Interpret the decision in the context of the original claim. There ▼ is not is enough evidence at the nothing% level of significance to ▼ reject support the claim that the mean amount of lead in the air in U.S. cities is ▼ equal greater than or equal less than or equal not equal greater than less than nothing…Test a claim that the mean amount of lead in the air in U.S. cities is less than 0.036 microgram per cubic meter. It was found that the mean amount of lead in the air for the random sample of 57 U.S. cities is 0.039 microgram per cubic meter and the standard deviation is 0.067 microgram per cubic meter. At α=0.10, can the claim be supported? Complete parts (a) through (e) below. Assume the population is normally distributed. Question content area bottom Part 1 (a) Identify the claim and state H0 and Ha. H0: muμ greater than or equals≥ 0.0360.036 Ha: muμ less than< 0.0360.036 (Type integers or decimals. Do not round.) The claim is the alternative hypothesis. Part 2 (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are t0=enter your response here. (Use a comma to separate answers as needed. Round to two decimal places as needed.)Part 6 of 7 (f) Determine whether to reject H. Use the a=0.10 level of significance. Do not reject the null hypothesis H Part: 6/7 Part 7 of 7 (g) State a conclusion. There is not enough evidence to conclude that the mean lead amount is less than 15 micrograms per liter. X
