We review a district court's decision to deny a motion for a new trial on the grounds enumerated in § 25-11-102, MCA, for an abuse of discretion. Willing v. Quebedeaux, 2009 MT 102, P 19, 350 Mont. 119, 204 P.3d 1248; see also Cooper v. Hanson, 2010 MT 113, ¶ 28, 356 Mont. 309, 318, 234 P.3d 59, 64-65. "The decision to grant or deny a new trial is within the sound discretion of the trial judge and will not be disturbed absent a showing of manifest abuse of that discretion. 'The standard requires that the abuse of discretion be so significant as to materially affect the substantial rights of the complaining party.'" Willing, ¶ 19 (quoting Lopez v. Josephson, 2001 MT 133, ¶ 16, 305 Mont. 446, 30 P.3d 326).