A mechаnicаl engineer is testing а new high-strength allоy bоlt. The histоrical mean tensile strength for standard bolts is 800 MPa. The engineer claims that a new heat-treatment process increases the mean tensile strength.Population Standard Deviation (Known): σ = 20 MPaSample Size: n = 45 bolts are tested.Significance Level: α = 0.05Hypothesis: H₀: μ = 800 vs. H1: μ > 800The engineer performs a one-sample z-test using statistical software. The output is shown below.Software Output (MINITAB)One-Sample Z: Tensile Strength Test of mu = 800 vs > 800 The assumed standard deviation = 20Variable N Mean StDev SE Mean 95% Lower Bound Z-Value P-ValueStrength 45 804.62 20 3.42 799.71 1.55 0.061Based on the output above, select the best statistical conclusion.
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