Hello, tutors. I need help with this. Can you please help me to solve it? Thank you!

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1. The average speed of cars on a highway is 150 km/hr. A sample of 40 cars shows an average speed of 145 km/hr with a standard deviation of 5 km/hr. Assuming a significance of 5% is the expectation of 150 km/hr reasonable? 2. A recent study was done to analyze sample pairs of measurements between running speed and time spent. The analysis revealed SSE = 5 and SST=20. What is the percentage of observations that can be explained? a. 25% b 15% c 50% d 75% 3. Two independent samples have different sizes. Sample 1 has a size of 64, a mean of $150,000 and a standard deviation of $15,000 while sample 2 has a size of 49, a mean of $180,000 and a standard deviation of $35,000. Write a hypothesis and a report showing your conclusion. 4. An ANOVA analysis was done on an experiment comparing five sections of a newspaper with samples of n = 10 in each section. The SS treatment showed a result of 100, while the SStotal showed 145. What is the value of Fstat?

SS	df	s2	F stat
Treatment	Treatment
Error	Error
Total	Total

a 2

b 3

c 4

d 25